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metamask-extension/app/scripts/controllers/ens/ens.js

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import { ethers } from 'ethers';
import ensNetworkMap from 'ethereum-ens-network-map';
import { NETWORK_ID_TO_ETHERS_NETWORK_NAME_MAP } from '../../../../shared/constants/network';
export default class Ens {
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static getNetworkEnsSupport(network) {
return Boolean(ensNetworkMap[network]);
}
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constructor({ network, provider } = {}) {
const networkName = NETWORK_ID_TO_ETHERS_NETWORK_NAME_MAP[network];
const ensAddress = ensNetworkMap[network];
const ethProvider = new ethers.providers.Web3Provider(provider, {
chainId: parseInt(network, 10),
name: networkName,
ensAddress,
});
this._ethProvider = ethProvider;
}
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lookup(ensName) {
return this._ethProvider.resolveName(ensName);
}
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reverse(address) {
return this._ethProvider.lookupAddress(address);
}
}