@iexec/dataprotector/dist/src/utils/getChainId.js

This product enables users to confidentially store data–such as mail address, documents, personal information ...

import { JsonRpcProvider, BrowserProvider, AbstractProvider, AbstractSigner, } from 'ethers';
import { DEFAULT_CHAIN_ID } from '../config/config.js';
export async function getChainIdFromProvider(ethProvider) {
    try {
        if (typeof ethProvider === 'string') {
            const provider = new JsonRpcProvider(ethProvider);
            const network = await provider.getNetwork();
            return Number(network.chainId);
        }
        else if (ethProvider instanceof AbstractProvider) {
            const network = await ethProvider.getNetwork();
            return Number(network.chainId);
        }
        else if (ethProvider instanceof AbstractSigner) {
            const { provider } = ethProvider;
            if (!provider) {
                throw Error('Signer is not connected to a provider');
            }
            const network = await provider.getNetwork();
            return Number(network.chainId);
        }
        else if ('request' in ethProvider) {
            const provider = new BrowserProvider(ethProvider);
            const network = await provider.getNetwork();
            return Number(network.chainId);
        }
    }
    catch (e) {
        console.warn('Failed to detect chainId:', e);
    }
    return DEFAULT_CHAIN_ID;
}
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