expo-wallet-core v0.3.0

expo-wallet-core

Provides access to cross-platform, cross-blockchain wallet library. This module wraps trustwallet/wallet-core.

API documentation

• Documentation for the Trust Wallet Core
• Usage

Installation in managed Expo projects

For managed Expo projects, please follow the installation instructions in the API documentation for the latest stable release. If you follow the link and there is no documentation available then this library is not yet usable within managed projects — it is likely to be included in an upcoming Expo SDK release.

Installation in bare React Native projects

For bare React Native projects, you must ensure that you have installed and configured the expo package before continuing.

Add the package to your npm dependencies

npm install expo-wallet-core

Configure for iOS

Run npx pod-install after installing the npm package.

Configure for Android

Usage

Create a new wallet

import * as WalletCore from "expo-wallet-core";

const wallet = await WalletCore.Wallet.build();

console.log(wallet.mnemonic);

Create an existing wallet

import * as WalletCore from "expo-wallet-core";

const wallet = await WalletCore.Wallet.build(
  "ripple scissors kick mammal hire column oak again sun offer wealth tomorrow wagon turn fatal",
);

console.log(wallet.mnemonic);

Get coin address

import * as WalletCore from "expo-wallet-core";

const wallet = await WalletCore.Wallet.build(
  "ripple scissors kick mammal hire column oak again sun offer wealth tomorrow wagon turn fatal",
);
const ethereumAddress = await wallet.getAddressForCoin(WalletCore.CoinType.Ethereum);

console.log(ethereumAddress);

Get coin key

import * as WalletCore from "expo-wallet-core";

const wallet = await WalletCore.Wallet.build(
  "ripple scissors kick mammal hire column oak again sun offer wealth tomorrow wagon turn fatal",
);
const ethereumKey = await wallet.getKeyForCoin(WalletCore.CoinType.Ethereum);

console.log(ethereumKey);

Sign transaction

import * as WalletCore from "expo-wallet-core";

const wallet = await WalletCore.Wallet.build(
  "ripple scissors kick mammal hire column oak again sun offer wealth tomorrow wagon turn fatal",
);
const signingInput = WalletCore.TW.Ethereum.Proto.SigningInput.encode({
  chainId: WalletCore.Utils.dec2buf(1),
  gasLimit: WalletCore.Utils.dec2buf(21000),
  gasPrice: WalletCore.Utils.dec2buf(3600000000),
  toAddress: "0xC37054b3b48C3317082E7ba872d7753D13da4986",
  privateKey: WalletCore.Utils.hex2buf(
    wallet.getKeyForCoin(WalletCore.CoinType.Ethereum),
  ),
  transaction: WalletCore.TW.Ethereum.Proto.Transaction.create({
    transfer: WalletCore.TW.Ethereum.Proto.Transaction.Transfer.create({
      amount: WalletCore.Utils.dec2buf(924400000000000),
    }),
  }),
});
const signer = await WalletCore.AnySigner().build()
const signingOutputRaw = await signer.sign(
  WalletCore.Utils.buf2hex(signingInput.finish()),
  WalletCore.CoinType.Ethereum,
);
const signingOutputEncoded =
  WalletCore.TW.Ethereum.Proto.SigningOutput.decode(
    WalletCore.Utils.hex2buf(signingOutputRaw),
  );
const transaction = WalletCore.Utils.buf2hex(signingOutputEncoded.encoded);

console.log(transaction);

Contributing

Contributions are very welcome! Please refer to guidelines described in the contributing guide.