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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/viem/_esm/actions/public
Просмотр файла: estimateGas.js
import { parseAccount, } from '../../accounts/utils/parseAccount.js';
import { BaseError } from '../../errors/base.js';
import { recoverAuthorizationAddress, } from '../../utils/authorization/recoverAuthorizationAddress.js';
import { numberToHex, } from '../../utils/encoding/toHex.js';
import { getEstimateGasError, } from '../../utils/errors/getEstimateGasError.js';
import { extract } from '../../utils/formatters/extract.js';
import { formatTransactionRequest, } from '../../utils/formatters/transactionRequest.js';
import { serializeStateOverride } from '../../utils/stateOverride.js';
import { assertRequest, } from '../../utils/transaction/assertRequest.js';
import { prepareTransactionRequest, } from '../wallet/prepareTransactionRequest.js';
import { getBalance } from './getBalance.js';
/**
* Estimates the gas necessary to complete a transaction without submitting it to the network.
*
* - Docs: https://viem.sh/docs/actions/public/estimateGas
* - JSON-RPC Methods: [`eth_estimateGas`](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_estimategas)
*
* @param client - Client to use
* @param parameters - {@link EstimateGasParameters}
* @returns The gas estimate (in gas units). {@link EstimateGasReturnType}
*
* @example
* import { createPublicClient, http, parseEther } from 'viem'
* import { mainnet } from 'viem/chains'
* import { estimateGas } from 'viem/public'
*
* const client = createPublicClient({
* chain: mainnet,
* transport: http(),
* })
* const gasEstimate = await estimateGas(client, {
* account: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e',
* to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
* value: parseEther('1'),
* })
*/
export async function estimateGas(client, args) {
const { account: account_ = client.account } = args;
const account = account_ ? parseAccount(account_) : undefined;
try {
const { accessList, authorizationList, blobs, blobVersionedHashes, blockNumber, blockTag, data, gas, gasPrice, maxFeePerBlobGas, maxFeePerGas, maxPriorityFeePerGas, nonce, value, stateOverride, ...rest } = (await prepareTransactionRequest(client, {
...args,
parameters:
// Some RPC Providers do not compute versioned hashes from blobs. We will need
// to compute them.
account?.type === 'local' ? undefined : ['blobVersionedHashes'],
}));
const blockNumberHex = typeof blockNumber === 'bigint' ? numberToHex(blockNumber) : undefined;
const block = blockNumberHex || blockTag;
const rpcStateOverride = serializeStateOverride(stateOverride);
const to = await (async () => {
// If `to` exists on the parameters, use that.
if (rest.to)
return rest.to;
// If no `to` exists, and we are sending a EIP-7702 transaction, use the
// address of the first authorization in the list.
if (authorizationList && authorizationList.length > 0)
return await recoverAuthorizationAddress({
authorization: authorizationList[0],
}).catch(() => {
throw new BaseError('`to` is required. Could not infer from `authorizationList`');
});
// Otherwise, we are sending a deployment transaction.
return undefined;
})();
assertRequest(args);
const chainFormat = client.chain?.formatters?.transactionRequest?.format;
const format = chainFormat || formatTransactionRequest;
const request = format({
// Pick out extra data that might exist on the chain's transaction request type.
...extract(rest, { format: chainFormat }),
from: account?.address,
accessList,
authorizationList,
blobs,
blobVersionedHashes,
data,
gas,
gasPrice,
maxFeePerBlobGas,
maxFeePerGas,
maxPriorityFeePerGas,
nonce,
to,
value,
});
function estimateGas_rpc(parameters) {
const { block, request, rpcStateOverride } = parameters;
return client.request({
method: 'eth_estimateGas',
params: rpcStateOverride
? [
request,
block ?? client.experimental_blockTag ?? 'latest',
rpcStateOverride,
]
: block
? [request, block]
: [request],
});
}
let estimate = BigInt(await estimateGas_rpc({ block, request, rpcStateOverride }));
// TODO(7702): Remove this once https://github.com/ethereum/execution-apis/issues/561 is resolved.
// Authorization list schema is not implemented on JSON-RPC spec yet, so we need to
// manually estimate the gas.
if (authorizationList) {
const value = await getBalance(client, { address: request.from });
const estimates = await Promise.all(authorizationList.map(async (authorization) => {
const { address } = authorization;
const estimate = await estimateGas_rpc({
block,
request: {
authorizationList: undefined,
data,
from: account?.address,
to: address,
value: numberToHex(value),
},
rpcStateOverride,
}).catch(() => 100000n);
return 2n * BigInt(estimate);
}));
estimate += estimates.reduce((acc, curr) => acc + curr, 0n);
}
return estimate;
}
catch (err) {
throw getEstimateGasError(err, {
...args,
account,
chain: client.chain,
});
}
}
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