@okwallet/extension/src/chain/Evm.js

OKX Wallet provides official SDK packages of multiple chains including [Ethereum](./wallet), [Aptos](./aptos-api), [Tron](./tron-api) and Solana. Developers can interact with different on-chain projects through OKX Wallet SDK.

import Web3 from 'web3';
import { chainsTypeMap } from '../constant';

const Evm = {
  getChainId: ({ provider }) => {
    return new Promise((resolve, reject) => {
      new Web3(provider).eth
        .getChainId()
        .then((chainId) => {
          resolve(chainId);
        })
        .catch((e) => {
          reject(e);
        });
    });
  },

  switchChain: ({ provider, chainId }) => {
    return new Promise((resolve, reject) => {
      provider
        .request({
          method: 'wallet_switchEthereumChain',
          params: [{ chainId }],
        })
        .then(() => {
          resolve();
        })
        .catch((e) => {
          reject(e);
        });
    });
  },

  sendTransaction: ({ provider, chainName, payload }) => {
    // eslint-disable-next-line no-async-promise-executor
    return new Promise(async (resolve, reject) => {
      try {
        const currentChainId = await Evm.getChainId({ provider });
        if (currentChainId !== chainsTypeMap.EVM[chainName].networkId) {
          await Evm.switchChain({
            provider,
            chainId: chainsTypeMap.EVM[chainName].chainId,
          });
        }
      } catch (e) {
        reject(e);
      }
      new Web3(provider).eth
        .sendTransaction(payload, (error, hash) => {
          if (!hash) {
            reject(error);
          }
          resolve({ hash });
        })
        .catch((e) => {
          reject(e);
        });
    });
  },

  signMessage: ({ provider, payload }) => {
    return new Promise((resolve, reject) => {
      const { message, account } = payload;
      new Web3(provider).eth.personal
        .sign(message, account)
        .then((signature) => {
          resolve(signature);
        })
        .catch((e) => {
          reject(e);
        });
    });
  },
};

export default Evm;