https://github.com/mover-code/golang-web3
use go for blockChain
https://github.com/mover-code/golang-web3
blockchain contract go golang web3
Last synced: 2 months ago
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use go for blockChain
- Host: GitHub
- URL: https://github.com/mover-code/golang-web3
- Owner: mover-code
- License: mit
- Created: 2022-01-15T03:05:44.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2023-05-29T09:21:46.000Z (almost 3 years ago)
- Last Synced: 2024-06-20T05:29:11.645Z (almost 2 years ago)
- Topics: blockchain, contract, go, golang, web3
- Language: Go
- Homepage:
- Size: 212 KB
- Stars: 8
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: readme.md
- License: LICENSE
Awesome Lists containing this project
README
# golang-web3
## install
```shell
go get -u github.com/mover-code/golang-web3.git@latest
```
> go get -u github.com/btcsuite/btcd@v0.22.0-beta 遇到ambiguous import
## desc
使用go操作区块链账户，发起交易，查询账户资产、合约交互、部署，事件监听等功能
## use
- 创建一个web3实例
```go
// It creates a new client for the given url.
//
// Args:
// url (string): The address of the RPC service.
func NewCli(url string) *jsonrpc.Client {
cli, err := jsonrpc.NewClient(url)
if err != nil {
panic(fmt.Sprintf("error:%s", url))
}
return cli
}
```
- 数据签名示例
```go
privateKey, _ := crypto.HexToECDSA(key) // 账户私钥
u256, _ := abi.NewType("uint256")
account, _ := abi.NewType("address")
type Ord struct {
Id *big.Int
Account web3.Address
Amount *big.Int
Fee *big.Int
Solt *big.Int
End *big.Int
Type *big.Int
State *big.Int
}
argumentInfo := []*abi.TupleElem{
&abi.TupleElem{
Name: "id",
Elem: u256,
},
&abi.TupleElem{
Name: "account",
Elem: account,
},
&abi.TupleElem{
Name: "amount",
Elem: u256,
},
&abi.TupleElem{
Name: "solt",
Elem: u256,
},
&abi.TupleElem{
Name: "end",
Elem: u256,
},
&abi.TupleElem{
Name: "type",
Elem: u256,
},
}
param := abi.NewTupleType(argumentInfo)
// 数据hash
hash, _ := param.Encode(&Ord{
Id: id,
Account: addr,
Amount: withDrawAmount,
Fee: big.NewInt(0),
Solt: solt,
End: endTime,
Type: wType,
State: big.NewInt(0),
})
hashs := crypto.Keccak256Hash(signString(""), crypto.Keccak256(hash)) // 按照合约中的方式组装数据
signature, _ := crypto.Sign(hashs.Bytes(), privateKey) // 使用私钥签名获取签名后的数据
r,s,v := SignRSV(signature) // 签名后的rsv数据
```
- 验证签名信息示例
```go
func VerifySig(msg, from, sigHex string) bool {
sig := hexutil.MustDecode(sigHex)
if sig[64] != 27 && sig[64] != 28 {
return false
}
sig[64] -= 27
addr, _ := wallet.Ecrecover(web3.SignHash([]byte(msg)), sig)
return addr == web3.HexToAddress(from)
}
```
- 代币转账示例 主币
```go
import(
web3 "github.com/mover-code/golang-web3"
"github.com/mover-code/golang-web3/jsonrpc"
"github.com/mover-code/golang-web3/wallet"
)
// rpc地址
cli, err := jsonrpc.NewClient(url)
if err != nil {
panic(fmt.Sprintf("error:%s", url))
}
block, _ := cli.Eth().BlockNumber() // 获取当前区块
balance, _ := cli.Eth().GetBalance(web3.HexToAddress(addr), web3.BlockNumber(block)) // 查询账户余额
nonce, err := cli.Eth().GetNonce(sender, web3.BlockNumber(block)) // 发起交易账户的序号
gas, _ := cli.Eth().GasPrice() // 当前gas
gasLimit, err := cli.Eth().EstimateGas(&web3.CallMsg{
From: sender, // 发起账户
To: &receiver, // 接收账户
GasPrice: gas,
Value: big.NewInt(amount), // 转账金额
})
// 组装交易信息
t := &web3.Transaction{
From: sender,
To: &receiver,
Value: big.NewInt(100000000000000000),
Nonce: nonce,
BlockNumber: uint64(block),
GasPrice: gas,
Gas: gasLimit,
}
chainId, _ := cli.Eth().ChainID()
signer := wallet.NewEIP155Signer(chainId.Uint64())
byteKey, _ := hex.DecodeString(private_hash) // 发起交易账户 私钥
key, _ := wallet.NewWalletFromPrivKey(byteKey)
data, err := signer.SignTx(t, key) // 签名数据
cli.Eth().SenSignTransaction(data) // 发起交易
```
- [关于事件监听](./event/event_test.go)