Initial commit

.gitignore

+node_modules
+.vscode
+.idea
+.DS_Store
+test.txt
+build
+src/types

LICENSE

+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
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+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

+# Uniswap V2 Subgraph
+
+[Uniswap](https://uniswap.org/) is a decentralized protocol for automated token exchange on Ethereum.
+
+This subgraph dynamically tracks any pair created by the uniswap factory. It tracks of the current state of Uniswap contracts, and contains derived stats for things like historical data and USD prices.
+
+- aggregated data across pairs and tokens,
+- data on individual pairs and tokens,
+- data on transactions
+- data on liquidity providers
+- historical data on Uniswap, pairs or tokens, aggregated by day
+
+## Running Locally
+
+Make sure to update package.json settings to point to your own graph account.
+
+## Queries
+
+Below are a few ways to show how to query the uniswap-subgraph for data. The queries show most of the information that is queryable, but there are many other filtering options that can be used, just check out the [querying api](https://thegraph.com/docs/graphql-api). These queries can be used locally or in The Graph Explorer playground.
+
+## Key Entity Overviews
+
+#### UniswapFactory
+
+Contains data across all of Uniswap V2. This entity tracks important things like total liquidity (in ETH and USD, see below), all time volume, transaction count, number of pairs and more.
+
+#### Token
+
+Contains data on a specific token. This token specific data is aggregated across all pairs, and is updated whenever there is a transaction involving that token.
+
+#### Pair
+
+Contains data on a specific pair.
+
+#### Transaction
+
+Every transaction on Uniswap is stored. Each transaction contains an array of mints, burns, and swaps that occured within it.
+
+#### Mint, Burn, Swap
+
+These contain specifc information about a transaction. Things like which pair triggered the transaction, amounts, sender, recipient, and more. Each is linked to a parent Transaction entity.
+
+## Example Queries
+
+### Querying Aggregated Uniswap Data
+
+This query fetches aggredated data from all uniswap pairs and tokens, to give a view into how much activity is happening within the whole protocol.
+
+```graphql
+{
+  uniswapFactories(first: 1) {
+    pairCount
+    totalVolumeUSD
+    totalLiquidityUSD
+  }
+}
+```
+
+
+先全部安装graph-cli
+npm install -g @graphprotocol/graph-cli@0.20.3
+
+helper.ts
+  修改factory地址
+
+prices.ts
+  修改WETH地址，USDT_WETH_PAIR用于获取主币的价格，USDC_WETH_PAIR和DAI_WETH_PAIR可以留空
+  修改WHITELIST默认追踪的白名单代币，也可以不填或不修改
+  测试网无价值，返回价值的都硬编码返回0 ZERO_BD
+
+subgraph.yaml
+  修改factory地址和开始区块，如果开始区块距今不满足7天，explorer info前端会报错
+
+部署
+yarn
+yarn codegen
+graph remove movat/movaswap --node http://13.204.105.72:8020
+graph create movat/movaswap --node http://13.204.105.72:8020
+graph deploy movat/movaswap --ipfs http://13.204.105.72:5001 --node http://13.204.105.72:8020

abis/ERC20.json

+[
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "name",
+    "outputs": [
+      {
+        "name": "",
+        "type": "string"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "_spender",
+        "type": "address"
+      },
+      {
+        "name": "_value",
+        "type": "uint256"
+      }
+    ],
+    "name": "approve",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "totalSupply",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "_from",
+        "type": "address"
+      },
+      {
+        "name": "_to",
+        "type": "address"
+      },
+      {
+        "name": "_value",
+        "type": "uint256"
+      }
+    ],
+    "name": "transferFrom",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "decimals",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint8"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "name": "_owner",
+        "type": "address"
+      }
+    ],
+    "name": "balanceOf",
+    "outputs": [
+      {
+        "name": "balance",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "symbol",
+    "outputs": [
+      {
+        "name": "",
+        "type": "string"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "_to",
+        "type": "address"
+      },
+      {
+        "name": "_value",
+        "type": "uint256"
+      }
+    ],
+    "name": "transfer",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "name": "_owner",
+        "type": "address"
+      },
+      {
+        "name": "_spender",
+        "type": "address"
+      }
+    ],
+    "name": "allowance",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "payable": true,
+    "stateMutability": "payable",
+    "type": "fallback"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "name": "owner",
+        "type": "address"
+      },
+      {
+        "indexed": true,
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "Approval",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "name": "from",
+        "type": "address"
+      },
+      {
+        "indexed": true,
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "Transfer",
+    "type": "event"
+  }
+]

abis/ERC20NameBytes.json

+[
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "name",
+    "outputs": [
+      {
+        "internalType": "bytes32",
+        "name": "",
+        "type": "bytes32"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  }
+]

abis/ERC20SymbolBytes.json

+[
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "symbol",
+    "outputs": [
+      {
+        "internalType": "bytes32",
+        "name": "",
+        "type": "bytes32"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  }
+]

abis/factory.json

+[
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_feeToSetter",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "constructor"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "token0",
+        "type": "address"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "token1",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "address",
+        "name": "pair",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "name": "PairCreated",
+    "type": "event"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "name": "allPairs",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "allPairsLength",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "tokenA",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "tokenB",
+        "type": "address"
+      }
+    ],
+    "name": "createPair",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "pair",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "feeTo",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "feeToSetter",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "name": "getPair",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_feeTo",
+        "type": "address"
+      }
+    ],
+    "name": "setFeeTo",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_feeToSetter",
+        "type": "address"
+      }
+    ],
+    "name": "setFeeToSetter",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  }
+]

abis/pair.json

+[
+  {
+    "inputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "constructor"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "owner",
+        "type": "address"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "Approval",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "sender",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount0",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount1",
+        "type": "uint256"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      }
+    ],
+    "name": "Burn",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "sender",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount0",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount1",
+        "type": "uint256"
+      }
+    ],
+    "name": "Mint",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "sender",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount0In",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount1In",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount0Out",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount1Out",
+        "type": "uint256"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      }
+    ],
+    "name": "Swap",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint112",
+        "name": "reserve0",
+        "type": "uint112"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint112",
+        "name": "reserve1",
+        "type": "uint112"
+      }
+    ],
+    "name": "Sync",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "from",
+        "type": "address"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "Transfer",
+    "type": "event"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "DOMAIN_SEPARATOR",
+    "outputs": [
+      {
+        "internalType": "bytes32",
+        "name": "",
+        "type": "bytes32"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "MINIMUM_LIQUIDITY",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "PERMIT_TYPEHASH",
+    "outputs": [
+      {
+        "internalType": "bytes32",
+        "name": "",
+        "type": "bytes32"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "name": "allowance",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "approve",
+    "outputs": [
+      {
+        "internalType": "bool",
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "name": "balanceOf",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      }
+    ],
+    "name": "burn",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "amount0",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "amount1",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "decimals",
+    "outputs": [
+      {
+        "internalType": "uint8",
+        "name": "",
+        "type": "uint8"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "factory",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "getReserves",
+    "outputs": [
+      {
+        "internalType": "uint112",
+        "name": "_reserve0",
+        "type": "uint112"
+      },
+      {
+        "internalType": "uint112",
+        "name": "_reserve1",
+        "type": "uint112"
+      },
+      {
+        "internalType": "uint32",
+        "name": "_blockTimestampLast",
+        "type": "uint32"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_token0",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "_token1",
+        "type": "address"
+      }
+    ],
+    "name": "initialize",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "kLast",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      }
+    ],
+    "name": "mint",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "liquidity",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "name",
+    "outputs": [
+      {
+        "internalType": "string",
+        "name": "",
+        "type": "string"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "name": "nonces",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "owner",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "deadline",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint8",
+        "name": "v",
+        "type": "uint8"
+      },
+      {
+        "internalType": "bytes32",
+        "name": "r",
+        "type": "bytes32"
+      },
+      {
+        "internalType": "bytes32",
+        "name": "s",
+        "type": "bytes32"
+      }
+    ],
+    "name": "permit",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "price0CumulativeLast",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "price1CumulativeLast",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      }
+    ],
+    "name": "skim",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "amount0Out",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "amount1Out",
+        "type": "uint256"
+      },
+      {
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "internalType": "bytes",
+        "name": "data",
+        "type": "bytes"
+      }
+    ],
+    "name": "swap",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "symbol",
+    "outputs": [
+      {
+        "internalType": "string",
+        "name": "",
+        "type": "string"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [],
+    "name": "sync",
+    "outputs": [],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "token0",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "token1",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "totalSupply",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "transfer",
+    "outputs": [
+      {
+        "internalType": "bool",
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "from",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "transferFrom",
+    "outputs": [
+      {
+        "internalType": "bool",
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  }
+]

package.json

+{
+  "name": "uniswap-v2-subgraph",
+  "version": "1.0.0",
+  "repository": "https://github.com/graphprotocol/uniswap-v2-subgraph",
+  "license": "GPL-3.0-or-later",
+  "scripts": {
+    "codegen": "graph codegen --output-dir src/types/",
+    "build": "graph build",
+    "create-local": "graph create davekaj/uniswap --node http://127.0.0.1:8020",
+    "deploy-local": "graph deploy davekaj/uniswap --debug --ipfs http://localhost:5001 --node http://127.0.0.1:8020",
+    "deploy": "graph deploy ianlapham/uniswap-v2-dev --ipfs https://api.thegraph.com/ipfs/ --node https://api.thegraph.com/deploy/ --debug",
+    "deploy-staging": "graph deploy $THE_GRAPH_GITHUB_USER/$THE_GRAPH_SUBGRAPH_NAME /Uniswap --ipfs https://api.staging.thegraph.com/ipfs/ --node https://api.staging.thegraph.com/deploy/",
+    "watch-local": "graph deploy graphprotocol/Uniswap2 --watch --debug --node http://127.0.0.1:8020/ --ipfs http://localhost:5001"
+  },
+  "devDependencies": {
+    "@graphprotocol/graph-cli": "^0.21.3",
+    "@graphprotocol/graph-ts": "^0.20.1",
+    "@typescript-eslint/eslint-plugin": "^2.0.0",
+    "@typescript-eslint/parser": "^2.0.0",
+    "eslint": "^6.2.2",
+    "eslint-config-prettier": "^6.1.0",
+    "prettier": "^1.18.2",
+    "typescript": "^3.5.2"
+  }
+}

schema.graphql

+type UniswapFactory @entity {
+  # factory address
+  id: ID!
+
+  # pair info
+  pairCount: Int!
+
+  # total volume
+  totalVolumeUSD: BigDecimal!
+  totalVolumeETH: BigDecimal!
+
+  # untracked values - less confident USD scores
+  untrackedVolumeUSD: BigDecimal!
+
+  # total liquidity
+  totalLiquidityUSD: BigDecimal!
+  totalLiquidityETH: BigDecimal!
+
+  # transactions
+  txCount: BigInt!
+}
+
+type Token @entity {
+  # token address
+  id: ID!
+
+  # mirrored from the smart contract
+  symbol: String!
+  name: String!
+  decimals: BigInt!
+
+  # used for other stats like marketcap
+  totalSupply: BigInt!
+
+  # token specific volume
+  tradeVolume: BigDecimal!
+  tradeVolumeUSD: BigDecimal!
+  untrackedVolumeUSD: BigDecimal!
+
+  # transactions across all pairs
+  txCount: BigInt!
+
+  # liquidity across all pairs
+  totalLiquidity: BigDecimal!
+
+  # derived prices
+  derivedETH: BigDecimal
+
+  # derived fields
+  tokenDayData: [TokenDayData!]! @derivedFrom(field: "token")
+  pairDayDataBase: [PairDayData!]! @derivedFrom(field: "token0")
+  pairDayDataQuote: [PairDayData!]! @derivedFrom(field: "token1")
+  pairBase: [Pair!]! @derivedFrom(field: "token0")
+  pairQuote: [Pair!]! @derivedFrom(field: "token1")
+}
+
+type Pair @entity {
+  # pair address
+  id: ID!
+
+  # mirrored from the smart contract
+  token0: Token!
+  token1: Token!
+  reserve0: BigDecimal!
+  reserve1: BigDecimal!
+  totalSupply: BigDecimal!
+
+  # derived liquidity
+  reserveETH: BigDecimal!
+  reserveUSD: BigDecimal!
+  # used for separating per pair reserves and global
+  trackedReserveETH: BigDecimal!
+
+  # Price in terms of the asset pair
+  token0Price: BigDecimal!
+  token1Price: BigDecimal!
+
+  # lifetime volume stats
+  volumeToken0: BigDecimal!
+  volumeToken1: BigDecimal!
+  volumeUSD: BigDecimal!
+  untrackedVolumeUSD: BigDecimal!
+  txCount: BigInt!
+
+  # creation stats
+  createdAtTimestamp: BigInt!
+  createdAtBlockNumber: BigInt!
+
+  # Fields used to help derived relationship
+  liquidityProviderCount: BigInt! # used to detect new exchanges
+  # derived fields
+  pairHourData: [PairHourData!]! @derivedFrom(field: "pair")
+  liquidityPositions: [LiquidityPosition!]! @derivedFrom(field: "pair")
+  liquidityPositionSnapshots: [LiquidityPositionSnapshot!]! @derivedFrom(field: "pair")
+  mints: [Mint!]! @derivedFrom(field: "pair")
+  burns: [Burn!]! @derivedFrom(field: "pair")
+  swaps: [Swap!]! @derivedFrom(field: "pair")
+}
+
+type User @entity {
+  id: ID!
+  liquidityPositions: [LiquidityPosition!] @derivedFrom(field: "user")
+  usdSwapped: BigDecimal!
+}
+
+type LiquidityPosition @entity {
+  id: ID!
+  user: User!
+  pair: Pair!
+  liquidityTokenBalance: BigDecimal!
+}
+
+# saved over time for return calculations, gets created and never updated
+type LiquidityPositionSnapshot @entity {
+  id: ID!
+  liquidityPosition: LiquidityPosition!
+  timestamp: Int! # saved for fast historical lookups
+  block: Int! # saved for fast historical lookups
+  user: User! # reference to user
+  pair: Pair! # reference to pair
+  token0PriceUSD: BigDecimal! # snapshot of token0 price
+  token1PriceUSD: BigDecimal! # snapshot of token1 price
+  reserve0: BigDecimal! # snapshot of pair token0 reserves
+  reserve1: BigDecimal! # snapshot of pair token1 reserves
+  reserveUSD: BigDecimal! # snapshot of pair reserves in USD
+  liquidityTokenTotalSupply: BigDecimal! # snapshot of pool token supply
+  liquidityTokenBalance: BigDecimal! # snapshot of users pool token balance
+}
+
+type Transaction @entity {
+  id: ID! # txn hash
+  blockNumber: BigInt!
+  timestamp: BigInt!
+  # This is not the reverse of Mint.transaction; it is only used to
+  # track incomplete mints (similar for burns and swaps)
+  mints: [Mint]!
+  burns: [Burn]!
+  swaps: [Swap]!
+}
+
+type Mint @entity {
+  # transaction hash + "-" + index in mints Transaction array
+  id: ID!
+  transaction: Transaction!
+  timestamp: BigInt! # need this to pull recent txns for specific token or pair
+  pair: Pair!
+
+  # populated from the primary Transfer event
+  to: Bytes!
+  liquidity: BigDecimal!
+
+  # populated from the Mint event
+  sender: Bytes
+  amount0: BigDecimal
+  amount1: BigDecimal
+  logIndex: BigInt
+  # derived amount based on available prices of tokens
+  amountUSD: BigDecimal
+
+  # optional fee fields, if a Transfer event is fired in _mintFee
+  feeTo: Bytes
+  feeLiquidity: BigDecimal
+}
+
+type Burn @entity {
+  # transaction hash + "-" + index in mints Transaction array
+  id: ID!
+  transaction: Transaction!
+  timestamp: BigInt! # need this to pull recent txns for specific token or pair
+  pair: Pair!
+
+  # populated from the primary Transfer event
+  liquidity: BigDecimal!
+
+  # populated from the Burn event
+  sender: Bytes
+  amount0: BigDecimal
+  amount1: BigDecimal
+  to: Bytes
+  logIndex: BigInt
+  # derived amount based on available prices of tokens
+  amountUSD: BigDecimal
+
+  # mark uncomplete in ETH case
+  needsComplete: Boolean!
+
+  # optional fee fields, if a Transfer event is fired in _mintFee
+  feeTo: Bytes
+  feeLiquidity: BigDecimal
+}
+
+type Swap @entity {
+  # transaction hash + "-" + index in swaps Transaction array
+  id: ID!
+  transaction: Transaction!
+  timestamp: BigInt! # need this to pull recent txns for specific token or pair
+  pair: Pair!
+
+  # populated from the Swap event
+  sender: Bytes!
+  from: Bytes! # the EOA that initiated the txn
+  amount0In: BigDecimal!
+  amount1In: BigDecimal!
+  amount0Out: BigDecimal!
+  amount1Out: BigDecimal!
+  to: Bytes!
+  logIndex: BigInt
+
+  # derived info
+  amountUSD: BigDecimal!
+}
+
+# stores for USD calculations
+type Bundle @entity {
+  id: ID!
+  ethPrice: BigDecimal! # price of ETH usd
+}
+
+# Data accumulated and condensed into day stats for all of Uniswap
+type UniswapDayData @entity {
+  id: ID! # timestamp rounded to current day by dividing by 86400
+  date: Int!
+
+  dailyVolumeETH: BigDecimal!
+  dailyVolumeUSD: BigDecimal!
+  dailyVolumeUntracked: BigDecimal!
+
+  totalVolumeETH: BigDecimal!
+  totalLiquidityETH: BigDecimal!
+  totalVolumeUSD: BigDecimal! # Accumulate at each trade, not just calculated off whatever totalVolume is. making it more accurate as it is a live conversion
+  totalLiquidityUSD: BigDecimal!
+
+  txCount: BigInt!
+}
+
+type PairHourData @entity {
+  id: ID!
+  hourStartUnix: Int! # unix timestamp for start of hour
+  pair: Pair!
+
+  # reserves
+  reserve0: BigDecimal!
+  reserve1: BigDecimal!
+
+  # total supply for LP historical returns
+  totalSupply: BigDecimal
+
+  # derived liquidity
+  reserveUSD: BigDecimal!
+
+  # volume stats
+  hourlyVolumeToken0: BigDecimal!
+  hourlyVolumeToken1: BigDecimal!
+  hourlyVolumeUSD: BigDecimal!
+  hourlyTxns: BigInt!
+}
+
+# Data accumulated and condensed into day stats for each exchange
+type PairDayData @entity {
+  id: ID!
+  date: Int!
+  pairAddress: Bytes!
+  token0: Token!
+  token1: Token!
+
+  # reserves
+  reserve0: BigDecimal!
+  reserve1: BigDecimal!
+
+  # total supply for LP historical returns
+  totalSupply: BigDecimal
+
+  # derived liquidity
+  reserveUSD: BigDecimal!
+
+  # volume stats
+  dailyVolumeToken0: BigDecimal!
+  dailyVolumeToken1: BigDecimal!
+  dailyVolumeUSD: BigDecimal!
+  dailyTxns: BigInt!
+}
+
+type TokenDayData @entity {
+  id: ID!
+  date: Int!
+  token: Token!
+
+  # volume stats
+  dailyVolumeToken: BigDecimal!
+  dailyVolumeETH: BigDecimal!
+  dailyVolumeUSD: BigDecimal!
+  dailyTxns: BigInt!
+
+  # liquidity stats
+  totalLiquidityToken: BigDecimal!
+  totalLiquidityETH: BigDecimal!
+  totalLiquidityUSD: BigDecimal!
+
+  # price stats
+  priceUSD: BigDecimal!
+}

src/mappings/core.ts

+/* eslint-disable prefer-const */
+import { BigInt, BigDecimal, store, Address } from '@graphprotocol/graph-ts'
+import {
+  Pair,
+  Token,
+  UniswapFactory,
+  Transaction,
+  Mint as MintEvent,
+  Burn as BurnEvent,
+  Swap as SwapEvent,
+  Bundle
+} from '../types/schema'
+import { Pair as PairContract, Mint, Burn, Swap, Transfer, Sync } from '../types/templates/Pair/Pair'
+import { updatePairDayData, updateTokenDayData, updateUniswapDayData, updatePairHourData } from './dayUpdates'
+import { getEthPriceInUSD, findEthPerToken, getTrackedVolumeUSD, getTrackedLiquidityUSD } from './pricing'
+import {
+  convertTokenToDecimal,
+  ADDRESS_ZERO,
+  FACTORY_ADDRESS,
+  ONE_BI,
+  createUser,
+  createLiquidityPosition,
+  ZERO_BD,
+  BI_18,
+  createLiquiditySnapshot
+} from './helpers'
+
+function isCompleteMint(mintId: string): boolean {
+  return MintEvent.load(mintId).sender !== null // sufficient checks
+}
+
+export function handleTransfer(event: Transfer): void {
+  // ignore initial transfers for first adds
+  if (event.params.to.toHexString() == ADDRESS_ZERO && event.params.value.equals(BigInt.fromI32(1000))) {
+    return
+  }
+
+  let factory = UniswapFactory.load(FACTORY_ADDRESS)
+  let transactionHash = event.transaction.hash.toHexString()
+
+  // user stats
+  let from = event.params.from
+  createUser(from)
+  let to = event.params.to
+  createUser(to)
+
+  // get pair and load contract
+  let pair = Pair.load(event.address.toHexString())
+  let pairContract = PairContract.bind(event.address)
+
+  // liquidity token amount being transfered
+  let value = convertTokenToDecimal(event.params.value, BI_18)
+
+  // get or create transaction
+  let transaction = Transaction.load(transactionHash)
+  if (transaction === null) {
+    transaction = new Transaction(transactionHash)
+    transaction.blockNumber = event.block.number
+    transaction.timestamp = event.block.timestamp
+    transaction.mints = []
+    transaction.burns = []
+    transaction.swaps = []
+  }
+
+  // mints
+  let mints = transaction.mints
+  if (from.toHexString() == ADDRESS_ZERO) {
+    // update total supply
+    pair.totalSupply = pair.totalSupply.plus(value)
+    pair.save()
+
+    // create new mint if no mints so far or if last one is done already
+    if (mints.length === 0 || isCompleteMint(mints[mints.length - 1])) {
+      let mint = new MintEvent(
+        event.transaction.hash
+          .toHexString()
+          .concat('-')
+          .concat(BigInt.fromI32(mints.length).toString())
+      )
+      mint.transaction = transaction.id
+      mint.pair = pair.id
+      mint.to = to
+      mint.liquidity = value
+      mint.timestamp = transaction.timestamp
+      mint.transaction = transaction.id
+      mint.save()
+
+      // update mints in transaction
+      transaction.mints = mints.concat([mint.id])
+
+      // save entities
+      transaction.save()
+      factory.save()
+    }
+  }
+
+  // case where direct send first on ETH withdrawls
+  if (event.params.to.toHexString() == pair.id) {
+    let burns = transaction.burns
+    let burn = new BurnEvent(
+      event.transaction.hash
+        .toHexString()
+        .concat('-')
+        .concat(BigInt.fromI32(burns.length).toString())
+    )
+    burn.transaction = transaction.id
+    burn.pair = pair.id
+    burn.liquidity = value
+    burn.timestamp = transaction.timestamp
+    burn.to = event.params.to
+    burn.sender = event.params.from
+    burn.needsComplete = true
+    burn.transaction = transaction.id
+    burn.save()
+
+    // TODO: Consider using .concat() for handling array updates to protect
+    // against unintended side effects for other code paths.
+    burns.push(burn.id)
+    transaction.burns = burns
+    transaction.save()
+  }
+
+  // burn
+  if (event.params.to.toHexString() == ADDRESS_ZERO && event.params.from.toHexString() == pair.id) {
+    pair.totalSupply = pair.totalSupply.minus(value)
+    pair.save()
+
+    // this is a new instance of a logical burn
+    let burns = transaction.burns
+    let burn: BurnEvent
+    if (burns.length > 0) {
+      let currentBurn = BurnEvent.load(burns[burns.length - 1])
+      if (currentBurn.needsComplete) {
+        burn = currentBurn as BurnEvent
+      } else {
+        burn = new BurnEvent(
+          event.transaction.hash
+            .toHexString()
+            .concat('-')
+            .concat(BigInt.fromI32(burns.length).toString())
+        )
+        burn.transaction = transaction.id
+        burn.needsComplete = false
+        burn.pair = pair.id
+        burn.liquidity = value
+        burn.transaction = transaction.id
+        burn.timestamp = transaction.timestamp
+      }
+    } else {
+      burn = new BurnEvent(
+        event.transaction.hash
+          .toHexString()
+          .concat('-')
+          .concat(BigInt.fromI32(burns.length).toString())
+      )
+      burn.transaction = transaction.id
+      burn.needsComplete = false
+      burn.pair = pair.id
+      burn.liquidity = value
+      burn.transaction = transaction.id
+      burn.timestamp = transaction.timestamp
+    }
+
+    // if this logical burn included a fee mint, account for this
+    if (mints.length !== 0 && !isCompleteMint(mints[mints.length - 1])) {
+      let mint = MintEvent.load(mints[mints.length - 1])
+      burn.feeTo = mint.to
+      burn.feeLiquidity = mint.liquidity
+      // remove the logical mint
+      store.remove('Mint', mints[mints.length - 1])
+      // update the transaction
+
+      // TODO: Consider using .slice().pop() to protect against unintended
+      // side effects for other code paths.
+      mints.pop()
+      transaction.mints = mints
+      transaction.save()
+    }
+    burn.save()
+    // if accessing last one, replace it
+    if (burn.needsComplete) {
+      // TODO: Consider using .slice(0, -1).concat() to protect against
+      // unintended side effects for other code paths.
+      burns[burns.length - 1] = burn.id
+    }
+    // else add new one
+    else {
+      // TODO: Consider using .concat() for handling array updates to protect
+      // against unintended side effects for other code paths.
+      burns.push(burn.id)
+    }
+    transaction.burns = burns
+    transaction.save()
+  }
+
+  if (from.toHexString() != ADDRESS_ZERO && from.toHexString() != pair.id) {
+    let fromUserLiquidityPosition = createLiquidityPosition(event.address, from)
+    fromUserLiquidityPosition.liquidityTokenBalance = convertTokenToDecimal(pairContract.balanceOf(from), BI_18)
+    fromUserLiquidityPosition.save()
+    createLiquiditySnapshot(fromUserLiquidityPosition, event)
+  }
+
+  if (event.params.to.toHexString() != ADDRESS_ZERO && to.toHexString() != pair.id) {
+    let toUserLiquidityPosition = createLiquidityPosition(event.address, to)
+    toUserLiquidityPosition.liquidityTokenBalance = convertTokenToDecimal(pairContract.balanceOf(to), BI_18)
+    toUserLiquidityPosition.save()
+    createLiquiditySnapshot(toUserLiquidityPosition, event)
+  }
+
+  transaction.save()
+}
+
+export function handleSync(event: Sync): void {
+  let pair = Pair.load(event.address.toHex())
+  let token0 = Token.load(pair.token0)
+  let token1 = Token.load(pair.token1)
+  let uniswap = UniswapFactory.load(FACTORY_ADDRESS)
+
+  // reset factory liquidity by subtracting onluy tarcked liquidity
+  uniswap.totalLiquidityETH = uniswap.totalLiquidityETH.minus(pair.trackedReserveETH as BigDecimal)
+
+  // reset token total liquidity amounts
+  token0.totalLiquidity = token0.totalLiquidity.minus(pair.reserve0)
+  token1.totalLiquidity = token1.totalLiquidity.minus(pair.reserve1)
+
+  pair.reserve0 = convertTokenToDecimal(event.params.reserve0, token0.decimals)
+  pair.reserve1 = convertTokenToDecimal(event.params.reserve1, token1.decimals)
+
+  if (pair.reserve1.notEqual(ZERO_BD)) pair.token0Price = pair.reserve0.div(pair.reserve1)
+  else pair.token0Price = ZERO_BD
+  if (pair.reserve0.notEqual(ZERO_BD)) pair.token1Price = pair.reserve1.div(pair.reserve0)
+  else pair.token1Price = ZERO_BD
+
+  pair.save()
+
+  // update ETH price now that reserves could have changed
+  let bundle = Bundle.load('1')
+  bundle.ethPrice = getEthPriceInUSD()
+  bundle.save()
+
+  token0.derivedETH = findEthPerToken(token0 as Token)
+  token1.derivedETH = findEthPerToken(token1 as Token)
+  token0.save()
+  token1.save()
+
+  // get tracked liquidity - will be 0 if neither is in whitelist
+  let trackedLiquidityETH: BigDecimal
+  if (bundle.ethPrice.notEqual(ZERO_BD)) {
+    trackedLiquidityETH = getTrackedLiquidityUSD(pair.reserve0, token0 as Token, pair.reserve1, token1 as Token).div(
+      bundle.ethPrice
+    )
+  } else {
+    trackedLiquidityETH = ZERO_BD
+  }
+
+  // use derived amounts within pair
+  pair.trackedReserveETH = trackedLiquidityETH
+  pair.reserveETH = pair.reserve0
+    .times(token0.derivedETH as BigDecimal)
+    .plus(pair.reserve1.times(token1.derivedETH as BigDecimal))
+  pair.reserveUSD = pair.reserveETH.times(bundle.ethPrice)
+
+  // use tracked amounts globally
+  uniswap.totalLiquidityETH = uniswap.totalLiquidityETH.plus(trackedLiquidityETH)
+  uniswap.totalLiquidityUSD = uniswap.totalLiquidityETH.times(bundle.ethPrice)
+
+  // now correctly set liquidity amounts for each token
+  token0.totalLiquidity = token0.totalLiquidity.plus(pair.reserve0)
+  token1.totalLiquidity = token1.totalLiquidity.plus(pair.reserve1)
+
+  // save entities
+  pair.save()
+  uniswap.save()
+  token0.save()
+  token1.save()
+}
+
+export function handleMint(event: Mint): void {
+  let transaction = Transaction.load(event.transaction.hash.toHexString())
+  let mints = transaction.mints
+  let mint = MintEvent.load(mints[mints.length - 1])
+
+  let pair = Pair.load(event.address.toHex())
+  let uniswap = UniswapFactory.load(FACTORY_ADDRESS)
+
+  let token0 = Token.load(pair.token0)
+  let token1 = Token.load(pair.token1)
+
+  // update exchange info (except balances, sync will cover that)
+  let token0Amount = convertTokenToDecimal(event.params.amount0, token0.decimals)
+  let token1Amount = convertTokenToDecimal(event.params.amount1, token1.decimals)
+
+  // update txn counts
+  token0.txCount = token0.txCount.plus(ONE_BI)
+  token1.txCount = token1.txCount.plus(ONE_BI)
+
+  // get new amounts of USD and ETH for tracking
+  let bundle = Bundle.load('1')
+  let amountTotalUSD = token1.derivedETH
+    .times(token1Amount)
+    .plus(token0.derivedETH.times(token0Amount))
+    .times(bundle.ethPrice)
+
+  // update txn counts
+  pair.txCount = pair.txCount.plus(ONE_BI)
+  uniswap.txCount = uniswap.txCount.plus(ONE_BI)
+
+  // save entities
+  token0.save()
+  token1.save()
+  pair.save()
+  uniswap.save()
+
+  mint.sender = event.params.sender
+  mint.amount0 = token0Amount as BigDecimal
+  mint.amount1 = token1Amount as BigDecimal
+  mint.logIndex = event.logIndex
+  mint.amountUSD = amountTotalUSD as BigDecimal
+  mint.save()
+
+  // update the LP position
+  let liquidityPosition = createLiquidityPosition(event.address, mint.to as Address)
+  createLiquiditySnapshot(liquidityPosition, event)
+
+  // update day entities
+  updatePairDayData(event)
+  updatePairHourData(event)
+  updateUniswapDayData(event)
+  updateTokenDayData(token0 as Token, event)
+  updateTokenDayData(token1 as Token, event)
+}
+
+export function handleBurn(event: Burn): void {
+  let transaction = Transaction.load(event.transaction.hash.toHexString())
+
+  // safety check
+  if (transaction === null) {
+    return
+  }
+
+  let burns = transaction.burns
+  let burn = BurnEvent.load(burns[burns.length - 1])
+
+  let pair = Pair.load(event.address.toHex())
+  let uniswap = UniswapFactory.load(FACTORY_ADDRESS)
+
+  //update token info
+  let token0 = Token.load(pair.token0)
+  let token1 = Token.load(pair.token1)
+  let token0Amount = convertTokenToDecimal(event.params.amount0, token0.decimals)
+  let token1Amount = convertTokenToDecimal(event.params.amount1, token1.decimals)
+
+  // update txn counts
+  token0.txCount = token0.txCount.plus(ONE_BI)
+  token1.txCount = token1.txCount.plus(ONE_BI)
+
+  // get new amounts of USD and ETH for tracking
+  let bundle = Bundle.load('1')
+  let amountTotalUSD = token1.derivedETH
+    .times(token1Amount)
+    .plus(token0.derivedETH.times(token0Amount))
+    .times(bundle.ethPrice)
+
+  // update txn counts
+  uniswap.txCount = uniswap.txCount.plus(ONE_BI)
+  pair.txCount = pair.txCount.plus(ONE_BI)
+
+  // update global counter and save
+  token0.save()
+  token1.save()
+  pair.save()
+  uniswap.save()
+
+  // update burn
+  // burn.sender = event.params.sender
+  burn.amount0 = token0Amount as BigDecimal
+  burn.amount1 = token1Amount as BigDecimal
+  // burn.to = event.params.to
+  burn.logIndex = event.logIndex
+  burn.amountUSD = amountTotalUSD as BigDecimal
+  burn.save()
+
+  // update the LP position
+  let liquidityPosition = createLiquidityPosition(event.address, burn.sender as Address)
+  createLiquiditySnapshot(liquidityPosition, event)
+
+  // update day entities
+  updatePairDayData(event)
+  updatePairHourData(event)
+  updateUniswapDayData(event)
+  updateTokenDayData(token0 as Token, event)
+  updateTokenDayData(token1 as Token, event)
+}
+
+export function handleSwap(event: Swap): void {
+  let pair = Pair.load(event.address.toHexString())
+  let token0 = Token.load(pair.token0)
+  let token1 = Token.load(pair.token1)
+  let amount0In = convertTokenToDecimal(event.params.amount0In, token0.decimals)
+  let amount1In = convertTokenToDecimal(event.params.amount1In, token1.decimals)
+  let amount0Out = convertTokenToDecimal(event.params.amount0Out, token0.decimals)
+  let amount1Out = convertTokenToDecimal(event.params.amount1Out, token1.decimals)
+
+  // totals for volume updates
+  let amount0Total = amount0Out.plus(amount0In)
+  let amount1Total = amount1Out.plus(amount1In)
+
+  // ETH/USD prices
+  let bundle = Bundle.load('1')
+
+  // get total amounts of derived USD and ETH for tracking
+  let derivedAmountETH = token1.derivedETH
+    .times(amount1Total)
+    .plus(token0.derivedETH.times(amount0Total))
+    .div(BigDecimal.fromString('2'))
+  let derivedAmountUSD = derivedAmountETH.times(bundle.ethPrice)
+
+  // only accounts for volume through white listed tokens
+  let trackedAmountUSD = getTrackedVolumeUSD(amount0Total, token0 as Token, amount1Total, token1 as Token, pair as Pair)
+
+  let trackedAmountETH: BigDecimal
+  if (bundle.ethPrice.equals(ZERO_BD)) {
+    trackedAmountETH = ZERO_BD
+  } else {
+    trackedAmountETH = trackedAmountUSD.div(bundle.ethPrice)
+  }
+
+  // update token0 global volume and token liquidity stats
+  token0.tradeVolume = token0.tradeVolume.plus(amount0In.plus(amount0Out))
+  token0.tradeVolumeUSD = token0.tradeVolumeUSD.plus(trackedAmountUSD)
+  token0.untrackedVolumeUSD = token0.untrackedVolumeUSD.plus(derivedAmountUSD)
+
+  // update token1 global volume and token liquidity stats
+  token1.tradeVolume = token1.tradeVolume.plus(amount1In.plus(amount1Out))
+  token1.tradeVolumeUSD = token1.tradeVolumeUSD.plus(trackedAmountUSD)
+  token1.untrackedVolumeUSD = token1.untrackedVolumeUSD.plus(derivedAmountUSD)
+
+  // update txn counts
+  token0.txCount = token0.txCount.plus(ONE_BI)
+  token1.txCount = token1.txCount.plus(ONE_BI)
+
+  // update pair volume data, use tracked amount if we have it as its probably more accurate
+  pair.volumeUSD = pair.volumeUSD.plus(trackedAmountUSD)
+  pair.volumeToken0 = pair.volumeToken0.plus(amount0Total)
+  pair.volumeToken1 = pair.volumeToken1.plus(amount1Total)
+  pair.untrackedVolumeUSD = pair.untrackedVolumeUSD.plus(derivedAmountUSD)
+  pair.txCount = pair.txCount.plus(ONE_BI)
+  pair.save()
+
+  // update global values, only used tracked amounts for volume
+  let uniswap = UniswapFactory.load(FACTORY_ADDRESS)
+  uniswap.totalVolumeUSD = uniswap.totalVolumeUSD.plus(trackedAmountUSD)
+  uniswap.totalVolumeETH = uniswap.totalVolumeETH.plus(trackedAmountETH)
+  uniswap.untrackedVolumeUSD = uniswap.untrackedVolumeUSD.plus(derivedAmountUSD)
+  uniswap.txCount = uniswap.txCount.plus(ONE_BI)
+
+  // save entities
+  pair.save()
+  token0.save()
+  token1.save()
+  uniswap.save()
+
+  let transaction = Transaction.load(event.transaction.hash.toHexString())
+  if (transaction === null) {
+    transaction = new Transaction(event.transaction.hash.toHexString())
+    transaction.blockNumber = event.block.number
+    transaction.timestamp = event.block.timestamp
+    transaction.mints = []
+    transaction.swaps = []
+    transaction.burns = []
+  }
+  let swaps = transaction.swaps
+  let swap = new SwapEvent(
+    event.transaction.hash
+      .toHexString()
+      .concat('-')
+      .concat(BigInt.fromI32(swaps.length).toString())
+  )
+
+  // update swap event
+  swap.transaction = transaction.id
+  swap.pair = pair.id
+  swap.timestamp = transaction.timestamp
+  swap.transaction = transaction.id
+  swap.sender = event.params.sender
+  swap.amount0In = amount0In
+  swap.amount1In = amount1In
+  swap.amount0Out = amount0Out
+  swap.amount1Out = amount1Out
+  swap.to = event.params.to
+  swap.from = event.transaction.from
+  swap.logIndex = event.logIndex
+  // use the tracked amount if we have it
+  swap.amountUSD = trackedAmountUSD === ZERO_BD ? derivedAmountUSD : trackedAmountUSD
+  swap.save()
+
+  // update the transaction
+
+  // TODO: Consider using .concat() for handling array updates to protect
+  // against unintended side effects for other code paths.
+  swaps.push(swap.id)
+  transaction.swaps = swaps
+  transaction.save()
+
+  // update day entities
+  let pairDayData = updatePairDayData(event)
+  let pairHourData = updatePairHourData(event)
+  let uniswapDayData = updateUniswapDayData(event)
+  let token0DayData = updateTokenDayData(token0 as Token, event)
+  let token1DayData = updateTokenDayData(token1 as Token, event)
+
+  // swap specific updating
+  uniswapDayData.dailyVolumeUSD = uniswapDayData.dailyVolumeUSD.plus(trackedAmountUSD)
+  uniswapDayData.dailyVolumeETH = uniswapDayData.dailyVolumeETH.plus(trackedAmountETH)
+  uniswapDayData.dailyVolumeUntracked = uniswapDayData.dailyVolumeUntracked.plus(derivedAmountUSD)
+  uniswapDayData.save()
+
+  // swap specific updating for pair
+  pairDayData.dailyVolumeToken0 = pairDayData.dailyVolumeToken0.plus(amount0Total)
+  pairDayData.dailyVolumeToken1 = pairDayData.dailyVolumeToken1.plus(amount1Total)
+  pairDayData.dailyVolumeUSD = pairDayData.dailyVolumeUSD.plus(trackedAmountUSD)
+  pairDayData.save()
+
+  // update hourly pair data
+  pairHourData.hourlyVolumeToken0 = pairHourData.hourlyVolumeToken0.plus(amount0Total)
+  pairHourData.hourlyVolumeToken1 = pairHourData.hourlyVolumeToken1.plus(amount1Total)
+  pairHourData.hourlyVolumeUSD = pairHourData.hourlyVolumeUSD.plus(trackedAmountUSD)
+  pairHourData.save()
+
+  // swap specific updating for token0
+  token0DayData.dailyVolumeToken = token0DayData.dailyVolumeToken.plus(amount0Total)
+  token0DayData.dailyVolumeETH = token0DayData.dailyVolumeETH.plus(amount0Total.times(token0.derivedETH as BigDecimal))
+  token0DayData.dailyVolumeUSD = token0DayData.dailyVolumeUSD.plus(
+    amount0Total.times(token0.derivedETH as BigDecimal).times(bundle.ethPrice)
+  )
+  token0DayData.save()
+
+  // swap specific updating
+  token1DayData.dailyVolumeToken = token1DayData.dailyVolumeToken.plus(amount1Total)
+  token1DayData.dailyVolumeETH = token1DayData.dailyVolumeETH.plus(amount1Total.times(token1.derivedETH as BigDecimal))
+  token1DayData.dailyVolumeUSD = token1DayData.dailyVolumeUSD.plus(
+    amount1Total.times(token1.derivedETH as BigDecimal).times(bundle.ethPrice)
+  )
+  token1DayData.save()
+}

src/mappings/dayUpdates.ts

+/* eslint-disable prefer-const */
+import { BigDecimal, BigInt, ethereum } from '@graphprotocol/graph-ts'
+import { Bundle, Pair, PairDayData, Token, TokenDayData, UniswapDayData, UniswapFactory } from '../types/schema'
+import { PairHourData } from './../types/schema'
+import { FACTORY_ADDRESS, ONE_BI, ZERO_BD, ZERO_BI } from './helpers'
+
+export function updateUniswapDayData(event: ethereum.Event): UniswapDayData {
+  let uniswap = UniswapFactory.load(FACTORY_ADDRESS)
+  let timestamp = event.block.timestamp.toI32()
+  let dayID = timestamp / 86400
+  let dayStartTimestamp = dayID * 86400
+  let uniswapDayData = UniswapDayData.load(dayID.toString())
+  if (uniswapDayData === null) {
+    uniswapDayData = new UniswapDayData(dayID.toString())
+    uniswapDayData.date = dayStartTimestamp
+    uniswapDayData.dailyVolumeUSD = ZERO_BD
+    uniswapDayData.dailyVolumeETH = ZERO_BD
+    uniswapDayData.totalVolumeUSD = ZERO_BD
+    uniswapDayData.totalVolumeETH = ZERO_BD
+    uniswapDayData.dailyVolumeUntracked = ZERO_BD
+  }
+
+  uniswapDayData.totalLiquidityUSD = uniswap.totalLiquidityUSD
+  uniswapDayData.totalLiquidityETH = uniswap.totalLiquidityETH
+  uniswapDayData.txCount = uniswap.txCount
+  uniswapDayData.save()
+
+  return uniswapDayData as UniswapDayData
+}
+
+export function updatePairDayData(event: ethereum.Event): PairDayData {
+  let timestamp = event.block.timestamp.toI32()
+  let dayID = timestamp / 86400
+  let dayStartTimestamp = dayID * 86400
+  let dayPairID = event.address
+    .toHexString()
+    .concat('-')
+    .concat(BigInt.fromI32(dayID).toString())
+  let pair = Pair.load(event.address.toHexString())
+  let pairDayData = PairDayData.load(dayPairID)
+  if (pairDayData === null) {
+    pairDayData = new PairDayData(dayPairID)
+    pairDayData.date = dayStartTimestamp
+    pairDayData.token0 = pair.token0
+    pairDayData.token1 = pair.token1
+    pairDayData.pairAddress = event.address
+    pairDayData.dailyVolumeToken0 = ZERO_BD
+    pairDayData.dailyVolumeToken1 = ZERO_BD
+    pairDayData.dailyVolumeUSD = ZERO_BD
+    pairDayData.dailyTxns = ZERO_BI
+  }
+
+  pairDayData.totalSupply = pair.totalSupply
+  pairDayData.reserve0 = pair.reserve0
+  pairDayData.reserve1 = pair.reserve1
+  pairDayData.reserveUSD = pair.reserveUSD
+  pairDayData.dailyTxns = pairDayData.dailyTxns.plus(ONE_BI)
+  pairDayData.save()
+
+  return pairDayData as PairDayData
+}
+
+export function updatePairHourData(event: ethereum.Event): PairHourData {
+  let timestamp = event.block.timestamp.toI32()
+  let hourIndex = timestamp / 3600 // get unique hour within unix history
+  let hourStartUnix = hourIndex * 3600 // want the rounded effect
+  let hourPairID = event.address
+    .toHexString()
+    .concat('-')
+    .concat(BigInt.fromI32(hourIndex).toString())
+  let pair = Pair.load(event.address.toHexString())
+  let pairHourData = PairHourData.load(hourPairID)
+  if (pairHourData === null) {
+    pairHourData = new PairHourData(hourPairID)
+    pairHourData.hourStartUnix = hourStartUnix
+    pairHourData.pair = event.address.toHexString()
+    pairHourData.hourlyVolumeToken0 = ZERO_BD
+    pairHourData.hourlyVolumeToken1 = ZERO_BD
+    pairHourData.hourlyVolumeUSD = ZERO_BD
+    pairHourData.hourlyTxns = ZERO_BI
+  }
+
+  pairHourData.totalSupply = pair.totalSupply
+  pairHourData.reserve0 = pair.reserve0
+  pairHourData.reserve1 = pair.reserve1
+  pairHourData.reserveUSD = pair.reserveUSD
+  pairHourData.hourlyTxns = pairHourData.hourlyTxns.plus(ONE_BI)
+  pairHourData.save()
+
+  return pairHourData as PairHourData
+}
+
+export function updateTokenDayData(token: Token, event: ethereum.Event): TokenDayData {
+  let bundle = Bundle.load('1')
+  let timestamp = event.block.timestamp.toI32()
+  let dayID = timestamp / 86400
+  let dayStartTimestamp = dayID * 86400
+  let tokenDayID = token.id
+    .toString()
+    .concat('-')
+    .concat(BigInt.fromI32(dayID).toString())
+
+  let tokenDayData = TokenDayData.load(tokenDayID)
+  if (tokenDayData === null) {
+    tokenDayData = new TokenDayData(tokenDayID)
+    tokenDayData.date = dayStartTimestamp
+    tokenDayData.token = token.id
+    tokenDayData.priceUSD = token.derivedETH.times(bundle.ethPrice)
+    tokenDayData.dailyVolumeToken = ZERO_BD
+    tokenDayData.dailyVolumeETH = ZERO_BD
+    tokenDayData.dailyVolumeUSD = ZERO_BD
+    tokenDayData.dailyTxns = ZERO_BI
+    tokenDayData.totalLiquidityUSD = ZERO_BD
+  }
+  tokenDayData.priceUSD = token.derivedETH.times(bundle.ethPrice)
+  tokenDayData.totalLiquidityToken = token.totalLiquidity
+  tokenDayData.totalLiquidityETH = token.totalLiquidity.times(token.derivedETH as BigDecimal)
+  tokenDayData.totalLiquidityUSD = tokenDayData.totalLiquidityETH.times(bundle.ethPrice)
+  tokenDayData.dailyTxns = tokenDayData.dailyTxns.plus(ONE_BI)
+  tokenDayData.save()
+
+  /**
+   * @todo test if this speeds up sync
+   */
+  // updateStoredTokens(tokenDayData as TokenDayData, dayID)
+  // updateStoredPairs(tokenDayData as TokenDayData, dayPairID)
+
+  return tokenDayData as TokenDayData
+}

src/mappings/factory.ts

+/* eslint-disable prefer-const */
+import { log } from '@graphprotocol/graph-ts'
+import { PairCreated } from '../types/Factory/Factory'
+import { Bundle, Pair, Token, UniswapFactory } from '../types/schema'
+import { Pair as PairTemplate } from '../types/templates'
+import {
+  FACTORY_ADDRESS,
+  fetchTokenDecimals,
+  fetchTokenName,
+  fetchTokenSymbol,
+  fetchTokenTotalSupply,
+  ZERO_BD,
+  ZERO_BI
+} from './helpers'
+
+export function handleNewPair(event: PairCreated): void {
+  // load factory (create if first exchange)
+  let factory = UniswapFactory.load(FACTORY_ADDRESS)
+  if (factory === null) {
+    factory = new UniswapFactory(FACTORY_ADDRESS)
+    factory.pairCount = 0
+    factory.totalVolumeETH = ZERO_BD
+    factory.totalLiquidityETH = ZERO_BD
+    factory.totalVolumeUSD = ZERO_BD
+    factory.untrackedVolumeUSD = ZERO_BD
+    factory.totalLiquidityUSD = ZERO_BD
+    factory.txCount = ZERO_BI
+
+    // create new bundle
+    let bundle = new Bundle('1')
+    bundle.ethPrice = ZERO_BD
+    bundle.save()
+  }
+  factory.pairCount = factory.pairCount + 1
+  factory.save()
+
+  // create the tokens
+  let token0 = Token.load(event.params.token0.toHexString())
+  let token1 = Token.load(event.params.token1.toHexString())
+
+  // fetch info if null
+  if (token0 === null) {
+    token0 = new Token(event.params.token0.toHexString())
+    token0.symbol = fetchTokenSymbol(event.params.token0)
+    token0.name = fetchTokenName(event.params.token0)
+    token0.totalSupply = fetchTokenTotalSupply(event.params.token0)
+    let decimals = fetchTokenDecimals(event.params.token0)
+
+    // bail if we couldn't figure out the decimals
+    if (decimals === null) {
+      log.debug('mybug the decimal on token 0 was null', [])
+      return
+    }
+
+    token0.decimals = decimals
+    token0.derivedETH = ZERO_BD
+    token0.tradeVolume = ZERO_BD
+    token0.tradeVolumeUSD = ZERO_BD
+    token0.untrackedVolumeUSD = ZERO_BD
+    token0.totalLiquidity = ZERO_BD
+    // token0.allPairs = []
+    token0.txCount = ZERO_BI
+  }
+
+  // fetch info if null
+  if (token1 === null) {
+    token1 = new Token(event.params.token1.toHexString())
+    token1.symbol = fetchTokenSymbol(event.params.token1)
+    token1.name = fetchTokenName(event.params.token1)
+    token1.totalSupply = fetchTokenTotalSupply(event.params.token1)
+    let decimals = fetchTokenDecimals(event.params.token1)
+
+    // bail if we couldn't figure out the decimals
+    if (decimals === null) {
+      return
+    }
+    token1.decimals = decimals
+    token1.derivedETH = ZERO_BD
+    token1.tradeVolume = ZERO_BD
+    token1.tradeVolumeUSD = ZERO_BD
+    token1.untrackedVolumeUSD = ZERO_BD
+    token1.totalLiquidity = ZERO_BD
+    // token1.allPairs = []
+    token1.txCount = ZERO_BI
+  }
+
+  let pair = new Pair(event.params.pair.toHexString()) as Pair
+  pair.token0 = token0.id
+  pair.token1 = token1.id
+  pair.liquidityProviderCount = ZERO_BI
+  pair.createdAtTimestamp = event.block.timestamp
+  pair.createdAtBlockNumber = event.block.number
+  pair.txCount = ZERO_BI
+  pair.reserve0 = ZERO_BD
+  pair.reserve1 = ZERO_BD
+  pair.trackedReserveETH = ZERO_BD
+  pair.reserveETH = ZERO_BD
+  pair.reserveUSD = ZERO_BD
+  pair.totalSupply = ZERO_BD
+  pair.volumeToken0 = ZERO_BD
+  pair.volumeToken1 = ZERO_BD
+  pair.volumeUSD = ZERO_BD
+  pair.untrackedVolumeUSD = ZERO_BD
+  pair.token0Price = ZERO_BD
+  pair.token1Price = ZERO_BD
+
+  // create the tracked contract based on the template
+  PairTemplate.create(event.params.pair)
+
+  // save updated values
+  token0.save()
+  token1.save()
+  pair.save()
+  factory.save()
+}

src/mappings/helpers.ts

+/* eslint-disable prefer-const */
+import { log, BigInt, BigDecimal, Address, ethereum } from '@graphprotocol/graph-ts'
+import { ERC20 } from '../types/Factory/ERC20'
+import { ERC20SymbolBytes } from '../types/Factory/ERC20SymbolBytes'
+import { ERC20NameBytes } from '../types/Factory/ERC20NameBytes'
+import { User, Bundle, Token, LiquidityPosition, LiquidityPositionSnapshot, Pair } from '../types/schema'
+import { Factory as FactoryContract } from '../types/templates/Pair/Factory'
+import { TokenDefinition } from './tokenDefinition'
+
+export const ADDRESS_ZERO = '0x0000000000000000000000000000000000000000'
+export const FACTORY_ADDRESS = '0xcFe29562342E165e561A95a8dc90d37e5bE2a2b7'
+
+export let ZERO_BI = BigInt.fromI32(0)
+export let ONE_BI = BigInt.fromI32(1)
+export let ZERO_BD = BigDecimal.fromString('0')
+export let ONE_BD = BigDecimal.fromString('1')
+export let BI_18 = BigInt.fromI32(18)
+
+export let factoryContract = FactoryContract.bind(Address.fromString(FACTORY_ADDRESS))
+
+// rebass tokens, dont count in tracked volume
+export let UNTRACKED_PAIRS: string[] = ['0x9ea3b5b4ec044b70375236a281986106457b20ef']
+
+export function exponentToBigDecimal(decimals: BigInt): BigDecimal {
+  let bd = BigDecimal.fromString('1')
+  for (let i = ZERO_BI; i.lt(decimals as BigInt); i = i.plus(ONE_BI)) {
+    bd = bd.times(BigDecimal.fromString('10'))
+  }
+  return bd
+}
+
+export function bigDecimalExp18(): BigDecimal {
+  return BigDecimal.fromString('1000000000000000000')
+}
+
+export function convertEthToDecimal(eth: BigInt): BigDecimal {
+  return eth.toBigDecimal().div(exponentToBigDecimal(18))
+}
+
+export function convertTokenToDecimal(tokenAmount: BigInt, exchangeDecimals: BigInt): BigDecimal {
+  if (exchangeDecimals == ZERO_BI) {
+    return tokenAmount.toBigDecimal()
+  }
+  return tokenAmount.toBigDecimal().div(exponentToBigDecimal(exchangeDecimals))
+}
+
+export function equalToZero(value: BigDecimal): boolean {
+  const formattedVal = parseFloat(value.toString())
+  const zero = parseFloat(ZERO_BD.toString())
+  if (zero == formattedVal) {
+    return true
+  }
+  return false
+}
+
+export function isNullEthValue(value: string): boolean {
+  return value == '0x0000000000000000000000000000000000000000000000000000000000000001'
+}
+
+export function fetchTokenSymbol(tokenAddress: Address): string {
+  // static definitions overrides
+  let staticDefinition = TokenDefinition.fromAddress(tokenAddress)
+  if (staticDefinition != null) {
+    return (staticDefinition as TokenDefinition).symbol
+  }
+
+  let contract = ERC20.bind(tokenAddress)
+  let contractSymbolBytes = ERC20SymbolBytes.bind(tokenAddress)
+
+  // try types string and bytes32 for symbol
+  let symbolValue = 'unknown'
+  let symbolResult = contract.try_symbol()
+  if (symbolResult.reverted) {
+    let symbolResultBytes = contractSymbolBytes.try_symbol()
+    if (!symbolResultBytes.reverted) {
+      // for broken pairs that have no symbol function exposed
+      if (!isNullEthValue(symbolResultBytes.value.toHexString())) {
+        symbolValue = symbolResultBytes.value.toString()
+      }
+    }
+  } else {
+    symbolValue = symbolResult.value
+  }
+
+  return symbolValue
+}
+
+export function fetchTokenName(tokenAddress: Address): string {
+  // static definitions overrides
+  let staticDefinition = TokenDefinition.fromAddress(tokenAddress)
+  if (staticDefinition != null) {
+    return (staticDefinition as TokenDefinition).name
+  }
+
+  let contract = ERC20.bind(tokenAddress)
+  let contractNameBytes = ERC20NameBytes.bind(tokenAddress)
+
+  // try types string and bytes32 for name
+  let nameValue = 'unknown'
+  let nameResult = contract.try_name()
+  if (nameResult.reverted) {
+    let nameResultBytes = contractNameBytes.try_name()
+    if (!nameResultBytes.reverted) {
+      // for broken exchanges that have no name function exposed
+      if (!isNullEthValue(nameResultBytes.value.toHexString())) {
+        nameValue = nameResultBytes.value.toString()
+      }
+    }
+  } else {
+    nameValue = nameResult.value
+  }
+
+  return nameValue
+}
+
+// HOT FIX: we cant implement try catch for overflow catching so skip total supply parsing on these tokens that overflow 
+// TODO: find better way to handle overflow 
+let SKIP_TOTAL_SUPPLY: string[] = [
+  "0x0000000000bf2686748e1c0255036e7617e7e8a5"
+]
+
+export function fetchTokenTotalSupply(tokenAddress: Address): BigInt {
+  if (SKIP_TOTAL_SUPPLY.includes(tokenAddress.toHexString())) {
+    return BigInt.fromI32(0)
+  }
+
+  let contract = ERC20.bind(tokenAddress)
+  let totalSupplyValue = null
+  let totalSupplyResult = contract.try_totalSupply()
+  if (!totalSupplyResult.reverted) {
+    totalSupplyValue = totalSupplyResult as i32
+  }
+  return BigInt.fromI32(totalSupplyValue as i32)
+}
+
+export function fetchTokenDecimals(tokenAddress: Address): BigInt {
+  // static definitions overrides
+  let staticDefinition = TokenDefinition.fromAddress(tokenAddress)
+  if (staticDefinition != null) {
+    return (staticDefinition as TokenDefinition).decimals
+  }
+
+  let contract = ERC20.bind(tokenAddress)
+  // try types uint8 for decimals
+  let decimalValue = null
+  let decimalResult = contract.try_decimals()
+  if (!decimalResult.reverted) {
+    decimalValue = decimalResult.value
+  }
+  return BigInt.fromI32(decimalValue as i32)
+}
+
+export function createLiquidityPosition(exchange: Address, user: Address): LiquidityPosition {
+  let id = exchange
+    .toHexString()
+    .concat('-')
+    .concat(user.toHexString())
+  let liquidityTokenBalance = LiquidityPosition.load(id)
+  if (liquidityTokenBalance === null) {
+    let pair = Pair.load(exchange.toHexString())
+    pair.liquidityProviderCount = pair.liquidityProviderCount.plus(ONE_BI)
+    liquidityTokenBalance = new LiquidityPosition(id)
+    liquidityTokenBalance.liquidityTokenBalance = ZERO_BD
+    liquidityTokenBalance.pair = exchange.toHexString()
+    liquidityTokenBalance.user = user.toHexString()
+    liquidityTokenBalance.save()
+    pair.save()
+  }
+  if (liquidityTokenBalance === null) log.error('LiquidityTokenBalance is null', [id])
+  return liquidityTokenBalance as LiquidityPosition
+}
+
+export function createUser(address: Address): void {
+  let user = User.load(address.toHexString())
+  if (user === null) {
+    user = new User(address.toHexString())
+    user.usdSwapped = ZERO_BD
+    user.save()
+  }
+}
+
+export function createLiquiditySnapshot(position: LiquidityPosition, event: ethereum.Event): void {
+  let timestamp = event.block.timestamp.toI32()
+  let bundle = Bundle.load('1')
+  let pair = Pair.load(position.pair)
+  let token0 = Token.load(pair.token0)
+  let token1 = Token.load(pair.token1)
+
+  // create new snapshot
+  let snapshot = new LiquidityPositionSnapshot(position.id.concat(timestamp.toString()))
+  snapshot.liquidityPosition = position.id
+  snapshot.timestamp = timestamp
+  snapshot.block = event.block.number.toI32()
+  snapshot.user = position.user
+  snapshot.pair = position.pair
+  snapshot.token0PriceUSD = token0.derivedETH.times(bundle.ethPrice)
+  snapshot.token1PriceUSD = token1.derivedETH.times(bundle.ethPrice)
+  snapshot.reserve0 = pair.reserve0
+  snapshot.reserve1 = pair.reserve1
+  snapshot.reserveUSD = pair.reserveUSD
+  snapshot.liquidityTokenTotalSupply = pair.totalSupply
+  snapshot.liquidityTokenBalance = position.liquidityTokenBalance
+  snapshot.liquidityPosition = position.id
+  snapshot.save()
+  position.save()
+}

src/mappings/pricing.ts

+/* eslint-disable prefer-const */
+import { Pair, Token, Bundle } from '../types/schema'
+import { BigDecimal, Address, BigInt } from '@graphprotocol/graph-ts/index'
+import { ZERO_BD, factoryContract, ADDRESS_ZERO, ONE_BD, UNTRACKED_PAIRS } from './helpers'
+
+const WETH_ADDRESS = '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2'
+const USDC_WETH_PAIR = '0xb4e16d0168e52d35cacd2c6185b44281ec28c9dc' // created 10008355
+const DAI_WETH_PAIR = '0xa478c2975ab1ea89e8196811f51a7b7ade33eb11' // created block 10042267
+const USDT_WETH_PAIR = '0x0d4a11d5eeaac28ec3f61d100daf4d40471f1852' // created block 10093341
+
+export function getEthPriceInUSD(): BigDecimal {
+  return ZERO_BD
+  // fetch eth prices for each stablecoin
+  let daiPair = Pair.load(DAI_WETH_PAIR) // dai is token0
+  let usdcPair = Pair.load(USDC_WETH_PAIR) // usdc is token0
+  let usdtPair = Pair.load(USDT_WETH_PAIR) // usdt is token1
+
+  // all 3 have been created
+  if (daiPair !== null && usdcPair !== null && usdtPair !== null) {
+    let totalLiquidityETH = daiPair.reserve1.plus(usdcPair.reserve1).plus(usdtPair.reserve0)
+    let daiWeight = daiPair.reserve1.div(totalLiquidityETH)
+    let usdcWeight = usdcPair.reserve1.div(totalLiquidityETH)
+    let usdtWeight = usdtPair.reserve0.div(totalLiquidityETH)
+    return daiPair.token0Price
+      .times(daiWeight)
+      .plus(usdcPair.token0Price.times(usdcWeight))
+      .plus(usdtPair.token1Price.times(usdtWeight))
+    // dai and USDC have been created
+  } else if (daiPair !== null && usdcPair !== null) {
+    let totalLiquidityETH = daiPair.reserve1.plus(usdcPair.reserve1)
+    let daiWeight = daiPair.reserve1.div(totalLiquidityETH)
+    let usdcWeight = usdcPair.reserve1.div(totalLiquidityETH)
+    return daiPair.token0Price.times(daiWeight).plus(usdcPair.token0Price.times(usdcWeight))
+    // USDC is the only pair so far
+  } else if (usdcPair !== null) {
+    return usdcPair.token0Price
+  } else {
+    return ZERO_BD
+  }
+}
+
+// token where amounts should contribute to tracked volume and liquidity
+let WHITELIST: string[] = [
+  '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2', // WETH
+  '0x6b175474e89094c44da98b954eedeac495271d0f', // DAI
+  '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48', // USDC
+  '0xdac17f958d2ee523a2206206994597c13d831ec7', // USDT
+  '0x0000000000085d4780b73119b644ae5ecd22b376', // TUSD
+  '0x5d3a536e4d6dbd6114cc1ead35777bab948e3643', // cDAI
+  '0x39aa39c021dfbae8fac545936693ac917d5e7563', // cUSDC
+  '0x86fadb80d8d2cff3c3680819e4da99c10232ba0f', // EBASE
+  '0x57ab1ec28d129707052df4df418d58a2d46d5f51', // sUSD
+  '0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2', // MKR
+  '0xc00e94cb662c3520282e6f5717214004a7f26888', // COMP
+  '0x514910771af9ca656af840dff83e8264ecf986ca', //LINK
+  '0x960b236a07cf122663c4303350609a66a7b288c0', //ANT
+  '0xc011a73ee8576fb46f5e1c5751ca3b9fe0af2a6f', //SNX
+  '0x0bc529c00c6401aef6d220be8c6ea1667f6ad93e', //YFI
+  '0xdf5e0e81dff6faf3a7e52ba697820c5e32d806a8', // yCurv
+  '0x853d955acef822db058eb8505911ed77f175b99e', // FRAX
+  '0xa47c8bf37f92abed4a126bda807a7b7498661acd', // WUST
+  '0x1f9840a85d5af5bf1d1762f925bdaddc4201f984', // UNI
+  '0x2260fac5e5542a773aa44fbcfedf7c193bc2c599', // WBTC
+  '0x956f47f50a910163d8bf957cf5846d573e7f87ca' // FEI
+]
+
+// minimum liquidity required to count towards tracked volume for pairs with small # of Lps
+let MINIMUM_USD_THRESHOLD_NEW_PAIRS = BigDecimal.fromString('400000')
+
+// minimum liquidity for price to get tracked
+let MINIMUM_LIQUIDITY_THRESHOLD_ETH = BigDecimal.fromString('2')
+
+/**
+ * Search through graph to find derived Eth per token.
+ * @todo update to be derived ETH (add stablecoin estimates)
+ **/
+export function findEthPerToken(token: Token): BigDecimal {
+  return ZERO_BD
+  if (token.id == WETH_ADDRESS) {
+    return ONE_BD
+  }
+  // loop through whitelist and check if paired with any
+  for (let i = 0; i < WHITELIST.length; ++i) {
+    let pairAddress = factoryContract.getPair(Address.fromString(token.id), Address.fromString(WHITELIST[i]))
+    if (pairAddress.toHexString() != ADDRESS_ZERO) {
+      let pair = Pair.load(pairAddress.toHexString())
+      if (pair.token0 == token.id && pair.reserveETH.gt(MINIMUM_LIQUIDITY_THRESHOLD_ETH)) {
+        let token1 = Token.load(pair.token1)
+        return pair.token1Price.times(token1.derivedETH as BigDecimal) // return token1 per our token * Eth per token 1
+      }
+      if (pair.token1 == token.id && pair.reserveETH.gt(MINIMUM_LIQUIDITY_THRESHOLD_ETH)) {
+        let token0 = Token.load(pair.token0)
+        return pair.token0Price.times(token0.derivedETH as BigDecimal) // return token0 per our token * ETH per token 0
+      }
+    }
+  }
+  return ZERO_BD // nothing was found return 0
+}
+
+/**
+ * Accepts tokens and amounts, return tracked amount based on token whitelist
+ * If one token on whitelist, return amount in that token converted to USD.
+ * If both are, return average of two amounts
+ * If neither is, return 0
+ */
+export function getTrackedVolumeUSD(
+  tokenAmount0: BigDecimal,
+  token0: Token,
+  tokenAmount1: BigDecimal,
+  token1: Token,
+  pair: Pair
+): BigDecimal {
+  return ZERO_BD
+  let bundle = Bundle.load('1')
+  let price0 = token0.derivedETH.times(bundle.ethPrice)
+  let price1 = token1.derivedETH.times(bundle.ethPrice)
+
+  // dont count tracked volume on these pairs - usually rebass tokens
+  if (UNTRACKED_PAIRS.includes(pair.id)) {
+    return ZERO_BD
+  }
+
+  // if less than 5 LPs, require high minimum reserve amount amount or return 0
+  if (pair.liquidityProviderCount.lt(BigInt.fromI32(5))) {
+    let reserve0USD = pair.reserve0.times(price0)
+    let reserve1USD = pair.reserve1.times(price1)
+    if (WHITELIST.includes(token0.id) && WHITELIST.includes(token1.id)) {
+      if (reserve0USD.plus(reserve1USD).lt(MINIMUM_USD_THRESHOLD_NEW_PAIRS)) {
+        return ZERO_BD
+      }
+    }
+    if (WHITELIST.includes(token0.id) && !WHITELIST.includes(token1.id)) {
+      if (reserve0USD.times(BigDecimal.fromString('2')).lt(MINIMUM_USD_THRESHOLD_NEW_PAIRS)) {
+        return ZERO_BD
+      }
+    }
+    if (!WHITELIST.includes(token0.id) && WHITELIST.includes(token1.id)) {
+      if (reserve1USD.times(BigDecimal.fromString('2')).lt(MINIMUM_USD_THRESHOLD_NEW_PAIRS)) {
+        return ZERO_BD
+      }
+    }
+  }
+
+  // both are whitelist tokens, take average of both amounts
+  if (WHITELIST.includes(token0.id) && WHITELIST.includes(token1.id)) {
+    return tokenAmount0
+      .times(price0)
+      .plus(tokenAmount1.times(price1))
+      .div(BigDecimal.fromString('2'))
+  }
+
+  // take full value of the whitelisted token amount
+  if (WHITELIST.includes(token0.id) && !WHITELIST.includes(token1.id)) {
+    return tokenAmount0.times(price0)
+  }
+
+  // take full value of the whitelisted token amount
+  if (!WHITELIST.includes(token0.id) && WHITELIST.includes(token1.id)) {
+    return tokenAmount1.times(price1)
+  }
+
+  // neither token is on white list, tracked volume is 0
+  return ZERO_BD
+}
+
+/**
+ * Accepts tokens and amounts, return tracked amount based on token whitelist
+ * If one token on whitelist, return amount in that token converted to USD * 2.
+ * If both are, return sum of two amounts
+ * If neither is, return 0
+ */
+export function getTrackedLiquidityUSD(
+  tokenAmount0: BigDecimal,
+  token0: Token,
+  tokenAmount1: BigDecimal,
+  token1: Token
+): BigDecimal {
+  return ZERO_BD
+  let bundle = Bundle.load('1')
+  let price0 = token0.derivedETH.times(bundle.ethPrice)
+  let price1 = token1.derivedETH.times(bundle.ethPrice)
+
+  // both are whitelist tokens, take average of both amounts
+  if (WHITELIST.includes(token0.id) && WHITELIST.includes(token1.id)) {
+    return tokenAmount0.times(price0).plus(tokenAmount1.times(price1))
+  }
+
+  // take double value of the whitelisted token amount
+  if (WHITELIST.includes(token0.id) && !WHITELIST.includes(token1.id)) {
+    return tokenAmount0.times(price0).times(BigDecimal.fromString('2'))
+  }
+
+  // take double value of the whitelisted token amount
+  if (!WHITELIST.includes(token0.id) && WHITELIST.includes(token1.id)) {
+    return tokenAmount1.times(price1).times(BigDecimal.fromString('2'))
+  }
+
+  // neither token is on white list, tracked volume is 0
+  return ZERO_BD
+}

src/mappings/tokenDefinition.ts

+import {
+  Address,
+  BigInt,
+} from "@graphprotocol/graph-ts"
+
+// Initialize a Token Definition with the attributes
+export class TokenDefinition {
+  address : Address
+  symbol: string
+  name: string
+  decimals: BigInt
+
+  // Initialize a Token Definition with its attributes
+  constructor(address: Address, symbol: string, name: string, decimals: BigInt) {
+    this.address = address
+    this.symbol = symbol
+    this.name = name
+    this.decimals = decimals
+  }
+
+  // Get all tokens with a static defintion
+  static getStaticDefinitions(): Array<TokenDefinition> {
+    let staticDefinitions = new Array<TokenDefinition>(6)
+
+    // Add DGD
+    let tokenDGD = new TokenDefinition(
+      Address.fromString('0xe0b7927c4af23765cb51314a0e0521a9645f0e2a'),
+      'DGD',
+      'DGD',
+      BigInt.fromI32(9)
+    )
+    staticDefinitions.push(tokenDGD)
+
+    // Add AAVE
+    let tokenAAVE = new TokenDefinition(
+      Address.fromString('0x7fc66500c84a76ad7e9c93437bfc5ac33e2ddae9'),
+      'AAVE',
+      'Aave Token',
+      BigInt.fromI32(18)
+    )
+    staticDefinitions.push(tokenAAVE)
+
+    // Add LIF
+    let tokenLIF = new TokenDefinition(
+      Address.fromString('0xeb9951021698b42e4399f9cbb6267aa35f82d59d'),
+      'LIF',
+      'Lif',
+      BigInt.fromI32(18)
+    )
+    staticDefinitions.push(tokenLIF)
+
+    // Add SVD
+    let tokenSVD = new TokenDefinition(
+      Address.fromString('0xbdeb4b83251fb146687fa19d1c660f99411eefe3'),
+      'SVD',
+      'savedroid',
+      BigInt.fromI32(18)
+    )
+    staticDefinitions.push(tokenSVD)
+
+    // Add TheDAO
+    let tokenTheDAO = new TokenDefinition(
+      Address.fromString('0xbb9bc244d798123fde783fcc1c72d3bb8c189413'),
+      'TheDAO',
+      'TheDAO',
+      BigInt.fromI32(16)
+    )
+    staticDefinitions.push(tokenTheDAO)
+
+    // Add HPB
+    let tokenHPB = new TokenDefinition(
+      Address.fromString('0x38c6a68304cdefb9bec48bbfaaba5c5b47818bb2'),
+      'HPB',
+      'HPBCoin',
+      BigInt.fromI32(18)
+    )
+    staticDefinitions.push(tokenHPB)
+
+    return staticDefinitions
+  }
+
+  // Helper for hardcoded tokens
+  static fromAddress(tokenAddress: Address) : TokenDefinition | null {
+    let staticDefinitions = this.getStaticDefinitions()
+    let tokenAddressHex = tokenAddress.toHexString()
+
+    // Search the definition using the address
+    for (let i = 0; i < staticDefinitions.length; i++) {
+      let staticDefinition = staticDefinitions[i]
+      if(staticDefinition.address.toHexString() == tokenAddressHex) {
+        return staticDefinition
+      }
+    }
+
+    // If not found, return null
+    return null
+  }
+
+}
\ No newline at end of file

subgraph.yaml

+specVersion: 0.0.2
+description: Uniswap is a decentralized protocol for automated token exchange on Ethereum.
+repository: https://github.com/Uniswap/uniswap-v2-subgraph
+schema:
+  file: ./schema.graphql
+dataSources:
+  - kind: ethereum/contract
+    name: Factory
+    network: mainnet
+    source:
+      address: '0xcFe29562342E165e561A95a8dc90d37e5bE2a2b7'
+      abi: Factory
+      startBlock: 1
+    mapping:
+      kind: ethereum/events
+      apiVersion: 0.0.4
+      language: wasm/assemblyscript
+      file: ./src/mappings/factory.ts
+      entities:
+        - Pair
+        - Token
+      abis:
+        - name: Factory
+          file: ./abis/factory.json
+        - name: ERC20
+          file: ./abis/ERC20.json
+        - name: ERC20SymbolBytes
+          file: ./abis/ERC20SymbolBytes.json
+        - name: ERC20NameBytes
+          file: ./abis/ERC20NameBytes.json
+      eventHandlers:
+        - event: PairCreated(indexed address,indexed address,address,uint256)
+          handler: handleNewPair
+templates:
+  - kind: ethereum/contract
+    name: Pair
+    network: mainnet
+    source:
+      abi: Pair
+    mapping:
+      kind: ethereum/events
+      apiVersion: 0.0.4
+      language: wasm/assemblyscript
+      file: ./src/mappings/core.ts
+      entities:
+        - Pair
+        - Token
+      abis:
+        - name: Pair
+          file: ./abis/pair.json
+        - name: Factory
+          file: ./abis/factory.json
+      eventHandlers:
+        - event: Mint(indexed address,uint256,uint256)
+          handler: handleMint
+        - event: Burn(indexed address,uint256,uint256,indexed address)
+          handler: handleBurn
+        - event: Swap(indexed address,uint256,uint256,uint256,uint256,indexed address)
+          handler: handleSwap
+        - event: Transfer(indexed address,indexed address,uint256)
+          handler: handleTransfer
+        - event: Sync(uint112,uint112)
+          handler: handleSync

tsconfig.json

+{
+  "extends": "./node_modules/@graphprotocol/graph-ts/tsconfig.json",
+  "compilerOptions": {
+    "types": ["@graphprotocol/graph-ts"]
+  }
+}