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import { BigNumberish, BigNumber } from '@ethersproject/bignumber'
import { keccak256 } from '@ethersproject/keccak256'
import { defaultAbiCoder } from '@ethersproject/abi'
import {
decodeVersionedNonce,
encodeCrossDomainMessageV0,
encodeCrossDomainMessageV1,
} from './encoding'
/**
* Bedrock output oracle data.
*/
export interface BedrockOutputData {
outputRoot: string
l1Timestamp: number
l2BlockNumber: number
l2OutputIndex: number
}
/**
* Bedrock state commitment
*/
export interface OutputRootProof {
version: string
stateRoot: string
messagePasserStorageRoot: string
latestBlockhash: string
}
/**
* Bedrock proof data required to finalize an L2 to L1 message.
*/
export interface BedrockCrossChainMessageProof {
l2OutputIndex: number
outputRootProof: OutputRootProof
withdrawalProof: string[]
}
/**
* Parameters that govern the L2OutputOracle.
*/
export type L2OutputOracleParameters = {
submissionInterval: number
startingBlockNumber: number
l2BlockTime: number
}
/**
* Hahses a cross domain message.
*
* @param nonce The cross domain message nonce
* @param sender The sender of the cross domain message
* @param target The target of the cross domain message
* @param value The value being sent with the cross domain message
* @param gasLimit The gas limit of the cross domain execution
* @param data The data passed along with the cross domain message
*/
export const hashCrossDomainMessage = (
nonce: BigNumber,
sender: string,
target: string,
value: BigNumber,
gasLimit: BigNumber,
data: string
) => {
const { version } = decodeVersionedNonce(nonce)
if (version.eq(0)) {
return hashCrossDomainMessagev0(target, sender, data, nonce)
} else if (version.eq(1)) {
return hashCrossDomainMessagev1(
nonce,
sender,
target,
value,
gasLimit,
data
)
}
throw new Error(`unknown version ${version.toString()}`)
}
/**
* Hahses a V0 cross domain message
*
* @param target The target of the cross domain message
* @param sender The sender of the cross domain message
* @param data The data passed along with the cross domain message
* @param nonce The cross domain message nonce
*/
export const hashCrossDomainMessagev0 = (
target: string,
sender: string,
data: string,
nonce: BigNumber
) => {
return keccak256(encodeCrossDomainMessageV0(target, sender, data, nonce))
}
/**
* Hahses a V1 cross domain message
*
* @param nonce The cross domain message nonce
* @param sender The sender of the cross domain message
* @param target The target of the cross domain message
* @param value The value being sent with the cross domain message
* @param gasLimit The gas limit of the cross domain execution
* @param data The data passed along with the cross domain message
*/
export const hashCrossDomainMessagev1 = (
nonce: BigNumber,
sender: string,
target: string,
value: BigNumberish,
gasLimit: BigNumberish,
data: string
) => {
return keccak256(
encodeCrossDomainMessageV1(nonce, sender, target, value, gasLimit, data)
)
}
/**
* Hashes a withdrawal
*
* @param nonce The cross domain message nonce
* @param sender The sender of the cross domain message
* @param target The target of the cross domain message
* @param value The value being sent with the cross domain message
* @param gasLimit The gas limit of the cross domain execution
* @param data The data passed along with the cross domain message
*/
export const hashWithdrawal = (
nonce: BigNumber,
sender: string,
target: string,
value: BigNumber,
gasLimit: BigNumber,
data: string
): string => {
const types = ['uint256', 'address', 'address', 'uint256', 'uint256', 'bytes']
const encoded = defaultAbiCoder.encode(types, [
nonce,
sender,
target,
value,
gasLimit,
data,
])
return keccak256(encoded)
}
/**
* Hahses an output root proof
*
* @param proof OutputRootProof
*/
export const hashOutputRootProof = (proof: OutputRootProof): string => {
return keccak256(
defaultAbiCoder.encode(
['bytes32', 'bytes32', 'bytes32', 'bytes32'],
[
proof.version,
proof.stateRoot,
proof.messagePasserStorageRoot,
proof.latestBlockhash,
]
)
)
}