The Optimism utilities is a small package to provide some additional utilities required for those that wish to more closely interact with Optimism-sepcific features.
This package is currently experimental and beta; the API is subject to change.
/home/ricmoo> npm install @ethers-ext/utils-optimism
By default, estimateGas will connect to the Ethers default Optimism provider. When providing a transaction, using a fully populated transaction will result in the best possible L1 estimation.
import { estimateGas } from "@ethers-ext/utils-optimism";
// Given a transaction
// const tx = wallet.populateTransaction(...txParams);
// ... or ...
// const tx = contract.foobar.populateTransaction(...args);
const { gas, gasL1, gasL2 } = await estimateGas(tx);
An optional second parameter may be passed into choose another Provider:
// Connect to the default Optimism Goerli provider result = await estimateGas(tx, "optimism-goerli") // Connect to a local JSON-RPC provider result = await estimateGas(tx, "https://localhost:8545") // Connect to a normal Ethers provider, like MetaMask provider = new BrowserProvider(window.ethereum) result = await estimateGas(tx, provider)
estimateGas(tx, provider?) => Promise<{ gas: bigint, gasL1: bigint, gasL2: bigint }>
Estimate the L1 and L2 gas requirements for tx. If provider is not specified the default Ethers provider for Optimism is used. If a string is provided the standard getDefaultProvder logic is used.
MIT License.
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