op-node,contracts-bedrock: setup `loadAllocs` usage

Modularize the `op-node` command for creating L2 genesis
blocks such that it can read a starting L1 block from disk
instead of needing to fetch it from a node. This makes the
process more simple and reproducible, because the block
JSON file can be written to disk and committed into a repo.

Also add the script for calling the `op-node` L2 genesis generation
to `contracts-bedrock`. It will create the L2 genesis state
in `contracts-bedrock/.testdata` which will be read by
`vm.readAllocs(string)` to populate the initial state.

packages/contracts-bedrock/.gitignore

@@ -3,12 +3,14 @@ artifacts
 forge-artifacts
 cache
 broadcast
-typechain
 
 # Metrics
 coverage.out
 .resource-metering.csv
 
+# Testing State
+.testdata
+
 # Scripts
 scripts/go-ffi/go-ffi
 

packages/contracts-bedrock/scripts/generate-l2-genesis.sh

+#!/usr/bin/env bash
+
+# Create a L2 genesis.json suitable for the solidity tests to
+# ingest using `vm.loadAllocs(string)`.
+# This script depends on the relative path to the op-node from
+# contracts-bedrock
+
+SCRIPTS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" > /dev/null && pwd)"
+CONTRACTS_DIR="$(realpath "$SCRIPTS_DIR/..")"
+MONOREPO_BASE="$(realpath "$CONTRACTS_DIR/../..")"
+
+DEPLOY_ARTIFACT="$CONTRACTS_DIR/deployments/hardhat/.deploy"
+OP_NODE="$MONOREPO_BASE/op-node/cmd/main.go"
+L1_STARTING_BLOCK_PATH="$CONTRACTS_DIR/test/mocks/block.json"
+TESTDATA_DIR="$CONTRACTS_DIR/.testdata"
+
+OUTFILE_L2="$TESTDATA_DIR/genesis.json"
+OUTFILE_ROLLUP="$TESTDATA_DIR/rollup.json"
+OUTFILE_ALLOC="$TESTDATA_DIR/alloc.json"
+
+mkdir -p "$TESTDATA_DIR"
+
+if [ ! -f "$DEPLOY_ARTIFACT" ]; then
+  forge script $CONTRACTS_DIR/scripts/Deploy.s.sol:Deploy 2>&1 /dev/null
+fi
+
+# TODO:
+# if the testdata dir doesn't exist, run the command
+# add a clean command to the package.json
+
+go run $OP_NODE genesis l2 \
+  --deploy-config "$CONTRACTS_DIR/deploy-config/hardhat.json" \
+  --l1-deployments "$DEPLOY_ARTIFACT" \
+  --l1-starting-block "$L1_STARTING_BLOCK_PATH" \
+  --outfile.l2 "$OUTFILE_L2" \
+  --outfile.rollup "$OUTFILE_ROLLUP" >/dev/null 2>&1
+
+jq .alloc < "$OUTFILE_L2" > "$OUTFILE_ALLOC"

packages/contracts-bedrock/test/mocks/block.json

+{
+  "hash": "0xfd3c5e25a80f54a53c58bd3ad8c076dc1c0cdbd44ec2164d2d2b8cc50481cb78",
+  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+  "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
+  "miner": "0x0000000000000000000000000000000000000000",
+  "stateRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
+  "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
+  "receiptsRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
+  "number": "0x0",
+  "gasUsed": "0x0",
+  "gasLimit": "0x1c9c380",
+  "extraData": "0x",
+  "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+  "timestamp": "0x654caabb",
+  "difficulty": "0x0",
+  "totalDifficulty": "0x0",
+  "sealFields": [
+    "0x0000000000000000000000000000000000000000000000000000000000000000",
+    "0x0000000000000000"
+  ],
+  "uncles": [],
+  "transactions": [],
+  "size": "0x202",
+  "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+  "nonce": "0x0000000000000000",
+  "baseFeePerGas": "0x3b9aca00"
+}