viem
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JavaScript
import { estimateContractGas, } from '../../actions/public/estimateContractGas.js';
import { portalAbi } from '../abis.js';
/**
* Estimates gas required to prove a withdrawal that occurred on an L2.
*
* - Docs: https://viem.sh/op-stack/actions/estimateProveWithdrawalGas
*
* @param client - Client to use
* @param parameters - {@link EstimateProveWithdrawalGasParameters}
* @returns Estimated gas. {@link EstimateProveWithdrawalGasReturnType}
*
* @example
* import { createPublicClient, http, parseEther } from 'viem'
* import { base, mainnet } from 'viem/chains'
* import { estimateProveWithdrawalGas } from 'viem/op-stack'
*
* const client = createPublicClient({
* chain: mainnet,
* transport: http(),
* })
*
* const gas = await estimateProveWithdrawalGas(client, {
* account: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e',
* l2OutputIndex: 4529n,
* outputRootProof: { ... },
* targetChain: optimism,
* withdrawalProof: [ ... ],
* withdrawal: { ... },
* })
*/
export async function estimateProveWithdrawalGas(client, parameters) {
const { account, chain = client.chain, gas, l2OutputIndex, maxFeePerGas, maxPriorityFeePerGas, nonce, outputRootProof, targetChain, withdrawalProof, withdrawal, } = parameters;
const portalAddress = (() => {
if (parameters.portalAddress)
return parameters.portalAddress;
if (chain)
return targetChain.contracts.portal[chain.id].address;
return Object.values(targetChain.contracts.portal)[0].address;
})();
const params = {
account,
abi: portalAbi,
address: portalAddress,
functionName: 'proveWithdrawalTransaction',
args: [withdrawal, l2OutputIndex, outputRootProof, withdrawalProof],
gas,
maxFeePerGas,
maxPriorityFeePerGas,
nonce,
// TODO: Not sure `chain` is necessary since it's not used downstream
// in `estimateContractGas` or `estimateGas`
// @ts-ignore
chain,
};
return estimateContractGas(client, params);
}
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