之前想用React Native开发一版以太坊钱包app，但在生成账户那块遇见了问题，没有crypto等nodejs包，react native是运行在JavaScriptCore环境里面，是没有buffer, crypto 跟 stream这些库的，所以为了解决，就跟同事开发了基于golang的web3go，然后使用gomoble工具编译成ios需要的framework以及android需要的jar aar，完美解决问题
演示
dapp-demo-1.jpg
dapp-demo-2.jpg
安装web3go
git clone https://github.com/bcl-chain/web3.go.git
使用gomobile编译成framework，jar，aar
// generate frameworkgomobile bind -target=ios ./github.com/bcl-chain/web3 .go/mobile// generate arr jargomobile bind -target=android ./github.com/bcl-chain/web3.go/mobile
把生成的包link到原生app里面
link-web3go.jpg
andoir-getbalence.jpg
下载ETH本地测试工具ganache-cli
gan-cli.jpg
安装依赖
yarn react-native run-android react-native run-ios
getBalance代码分析
// IOS
RCT_EXPORT_METHOD(getBalance:
(NSString*) address:
(RCTPromiseResolveBlock)resolve
rejecter:(RCTPromiseRejectBlock)reject){
// ip地址
Web3goEthereumClient* client = Web3goNewEthereumClient(nodeIP, nil);
Web3goContext* ctx = Web3goNewContext();
// 账户地址
Web3goAddress* address1 = Web3goNewAddressFromHex(address, nil);
@try {
Web3goBigInt* a = [client getBalanceAt:ctx account:address1 number:-1 error:nil];
NSString* ammount = [a getString:10];
NSLog(@"%@", ammount);
resolve(ammount);
} @catch (NSError *exception) {
NSLog(@"NSError: %@", exception);
reject(@"NSError: %@", @"There were no events", exception);
} @finally {
NSLog(@"finally");
}
}
// android
@ReactMethod
public void getBalance(String address, Promise promise) {
try {
web3go.EthereumClient client = Web3go.newEthereumClient(nodeIP);
web3go.Context ctx = Web3go.newContext();
web3go.Address address1 = Web3go.newAddressFromHex(address);
web3go.BigInt a = client.getBalanceAt(ctx, address1, -1);
String ammout = a.getString(10);
promise.resolve(ammout);
} catch (Exception e) {
promise.reject(e.getMessage());
}
}
// react-native
async getBalance() {
try {
var ammount = await NativeModules.Web3go.getBalance(this.state.defGaAddress);
this.setState({
gaAmmount: ammount
})
} catch (e) {
console.error(e);
}
}
如果有用，给个start
以上所述是小编给大家介绍的使用React Native创建以太坊钱包实现转账等功能,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
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