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

yarnreact-native run-androidreact-native run-ios

getBalance代码分析

// IOSRCT_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@ReactMethodpublic 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-nativeasync 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

web3go

React-Native-Dapp

总结

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网站的支持！
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