import 'package:bip39/bip39.dart' as bip39;
import 'package:shared_preferences/shared_preferences.dart';
import 'package:sacco/sacco.dart';
1.调用bip39库生成助记词，先暂时用shared_preferences存储着
List mnemonic;
连接节点
final networkInfo = NetworkInfo(name: "", bech32Hrp: "cosmos", lcdUrl: "http://172.168.0.78:1317");
void getMnemonic() async{
String randomMnemonic = await bip39.generateMnemonic();
mnemonic = randomMnemonic.split(" ");//将助记词转换成List类型
prefs.setStringList("mnemonic", mnemonic);
}
2.调用sacco库用之前存储的助记词创建钱包对象
wallet() async{
SharedPreferences prefs = await SharedPreferences.getInstance();
var mnemonicString = prefs.getStringList("mnemonic");
Wallet wallet = Wallet.derive(mnemonicString, networkInfo);
return wallet;
}
获取钱包地址：
Wallet wa = await wallet();
print("地址"+wa.bech32Address);
3.发送一个交易
final message = StdMsg(
type: "cosmos-sdk/MsgSend",
value: {
"from_address": "cosmos1huydeevpz37sd9snkgul6070mstupukw00xkw9",
"to_address": "cosmos18rwfv9yj7u4zmahv4y299ft086j704cxal9mtf",
"amount": [
{"denom": "zcoin", "amount": "1"}
]
},
);
//签名交易
final stdTx = TxBuilder.buildStdTx(stdMsgs: [message]);
//发送交易
final signedStdTx = await TxSigner.signStdTx(
wallet: wa, stdTx: stdTx);
final result = await TxSender.broadcastStdTx(
wallet: wallet,
stdTx: signedStdTx,
);
if (result.success) {
print("Tx send successfully. Hash: ${result.hash}");
} else {
print("Tx send error: ${result.error.errorMessage}");
}