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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/viem/_esm/actions/ens
Просмотр файла: getEnsText.js
import { textResolverAbi, universalResolverResolveAbi, } from '../../constants/abis.js';
import { decodeFunctionResult, } from '../../utils/abi/decodeFunctionResult.js';
import { encodeFunctionData, } from '../../utils/abi/encodeFunctionData.js';
import { getChainContractAddress, } from '../../utils/chain/getChainContractAddress.js';
import { toHex } from '../../utils/encoding/toHex.js';
import { isNullUniversalResolverError } from '../../utils/ens/errors.js';
import { localBatchGatewayUrl } from '../../utils/ens/localBatchGatewayRequest.js';
import { namehash } from '../../utils/ens/namehash.js';
import { packetToBytes, } from '../../utils/ens/packetToBytes.js';
import { getAction } from '../../utils/getAction.js';
import { readContract, } from '../public/readContract.js';
/**
* Gets a text record for specified ENS name.
*
* - Docs: https://viem.sh/docs/ens/actions/getEnsResolver
* - Examples: https://stackblitz.com/github/wevm/viem/tree/main/examples/ens
*
* Calls `resolve(bytes, bytes)` on ENS Universal Resolver Contract.
*
* Since ENS names prohibit certain forbidden characters (e.g. underscore) and have other validation rules, you likely want to [normalize ENS names](https://docs.ens.domains/contract-api-reference/name-processing#normalising-names) with [UTS-46 normalization](https://unicode.org/reports/tr46) before passing them to `getEnsAddress`. You can use the built-in [`normalize`](https://viem.sh/docs/ens/utilities/normalize) function for this.
*
* @param client - Client to use
* @param parameters - {@link GetEnsTextParameters}
* @returns Address for ENS resolver. {@link GetEnsTextReturnType}
*
* @example
* import { createPublicClient, http } from 'viem'
* import { mainnet } from 'viem/chains'
* import { getEnsText, normalize } from 'viem/ens'
*
* const client = createPublicClient({
* chain: mainnet,
* transport: http(),
* })
* const twitterRecord = await getEnsText(client, {
* name: normalize('wevm.eth'),
* key: 'com.twitter',
* })
* // 'wevm_dev'
*/
export async function getEnsText(client, parameters) {
const { blockNumber, blockTag, key, name, gatewayUrls, strict } = parameters;
const { chain } = client;
const universalResolverAddress = (() => {
if (parameters.universalResolverAddress)
return parameters.universalResolverAddress;
if (!chain)
throw new Error('client chain not configured. universalResolverAddress is required.');
return getChainContractAddress({
blockNumber,
chain,
contract: 'ensUniversalResolver',
});
})();
const tlds = chain?.ensTlds;
if (tlds && !tlds.some((tld) => name.endsWith(tld)))
return null;
try {
const readContractParameters = {
address: universalResolverAddress,
abi: universalResolverResolveAbi,
args: [
toHex(packetToBytes(name)),
encodeFunctionData({
abi: textResolverAbi,
functionName: 'text',
args: [namehash(name), key],
}),
gatewayUrls ?? [localBatchGatewayUrl],
],
functionName: 'resolveWithGateways',
blockNumber,
blockTag,
};
const readContractAction = getAction(client, readContract, 'readContract');
const res = await readContractAction(readContractParameters);
if (res[0] === '0x')
return null;
const record = decodeFunctionResult({
abi: textResolverAbi,
functionName: 'text',
data: res[0],
});
return record === '' ? null : record;
}
catch (err) {
if (strict)
throw err;
if (isNullUniversalResolverError(err))
return null;
throw err;
}
}
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