@web3auth/no-modal/dist/lib.esm/connectors/base-evm-connector/baseEvmConnector.js

Multi chain wallet aggregator for web3Auth

import { signChallenge } from '@toruslabs/base-controllers';
import { bytesToHexPrefixedString, utf8ToBytes } from '@toruslabs/metadata-helpers';
import { EVM_METHOD_TYPES } from '@web3auth/ws-embed';
import { checksumAddress } from 'viem';
import { generateSiweNonce } from 'viem/siwe';
import { WalletLoginError, WalletInitializationError } from '../../base/errors/index.js';
import { citadelServerUrl } from '../../base/utils.js';
import { BaseConnector } from '../../base/connector/baseConnector.js';
import { CONNECTOR_STATUS, CONNECTOR_EVENTS } from '../../base/connector/constants.js';

class BaseEvmConnector extends BaseConnector {
  async init(_) {}
  async getAuthTokenInfo() {
    if (!this.provider || !this.canAuthorize) throw WalletLoginError.notConnectedError();
    if (!this.coreOptions) throw WalletInitializationError.invalidParams("Please initialize Web3Auth with valid options");
    this.status = CONNECTOR_STATUS.AUTHORIZING;
    this.emit(CONNECTOR_EVENTS.AUTHORIZING, {
      connector: this.name
    });
    const accounts = await this.provider.request({
      method: EVM_METHOD_TYPES.GET_ACCOUNTS
    });
    if (accounts && accounts.length > 0) {
      const cached = await this.getCachedOrNullAuthTokenInfo(accounts[0]);
      if (cached) return cached;
      const authServer = citadelServerUrl(this.coreOptions.authBuildEnv);
      const {
        challenge,
        signature,
        chainNamespace
      } = await this.generateChallengeAndSign(authServer, accounts);
      return this.verifyAndAuthorize({
        chainNamespace,
        signedMessage: signature,
        challenge,
        authServer
      });
    }
    throw WalletLoginError.notConnectedError("Not connected with wallet, Please login/connect first");
  }
  async generateChallengeAndSign(authServerUrl, accounts) {
    const accountsToUse = accounts || (await this.provider.request({
      method: EVM_METHOD_TYPES.GET_ACCOUNTS
    }));
    if (!accountsToUse || accountsToUse.length === 0) {
      throw WalletLoginError.notConnectedError("No accounts found in the connected wallet");
    }
    const chainId = await this.provider.request({
      method: "eth_chainId"
    });
    const currentChainConfig = this.coreOptions.chains.find(x => x.chainId === chainId);
    if (!currentChainConfig) throw WalletInitializationError.invalidParams("chainConfig is required before authentication");
    const {
      chainNamespace
    } = currentChainConfig;
    const authServer = authServerUrl || citadelServerUrl(this.coreOptions.authBuildEnv);
    const payload = {
      domain: window.location.host,
      uri: window.location.href,
      address: checksumAddress(accountsToUse[0]),
      chainId: parseInt(chainId, 16),
      version: "1",
      nonce: generateSiweNonce(),
      issuedAt: new Date().toISOString()
    };
    const challenge = await signChallenge(payload, chainNamespace, authServer);
    const hexChallenge = bytesToHexPrefixedString(utf8ToBytes(challenge));
    const signature = await this.provider.request({
      method: EVM_METHOD_TYPES.PERSONAL_SIGN,
      params: [hexChallenge, accountsToUse[0]]
    });
    return {
      challenge,
      signature,
      chainNamespace
    };
  }
  async disconnectSession() {
    super.checkDisconnectionRequirements();
    await this.clearWalletSession();
  }
  async disconnect() {
    this.rehydrated = false;
    this.emit(CONNECTOR_EVENTS.DISCONNECTED);
  }
}

export { BaseEvmConnector };