使用React Native创建以太坊钱包实现转账等功能
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
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我们网站的支持!
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