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go-ethereum | Official Go implementation of the Ethereum protocol | Blockchain library

 by   ethereum Go Version: v1.10.16 License: LGPL-3.0

 by   ethereum Go Version: v1.10.16 License: LGPL-3.0

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kandi X-RAY | go-ethereum Summary

go-ethereum is a Go library typically used in Blockchain, Ethereum applications. go-ethereum has no bugs, it has no vulnerabilities, it has a Weak Copyleft License and it has medium support. You can download it from GitHub.
Official Golang implementation of the Ethereum protocol. Automated builds are available for stable releases and the unstable master branch. Binary archives are published at https://geth.ethereum.org/downloads/.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • go-ethereum has a medium active ecosystem.
  • It has 35547 star(s) with 13171 fork(s). There are 2138 watchers for this library.
  • There were 8 major release(s) in the last 12 months.
  • There are 210 open issues and 5995 have been closed. On average issues are closed in 27 days. There are 101 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of go-ethereum is v1.10.16
go-ethereum Support
Best in #Blockchain
Average in #Blockchain
go-ethereum Support
Best in #Blockchain
Average in #Blockchain

quality kandi Quality

  • go-ethereum has 0 bugs and 0 code smells.
go-ethereum Quality
Best in #Blockchain
Average in #Blockchain
go-ethereum Quality
Best in #Blockchain
Average in #Blockchain

securitySecurity

  • go-ethereum has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • go-ethereum code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
go-ethereum Security
Best in #Blockchain
Average in #Blockchain
go-ethereum Security
Best in #Blockchain
Average in #Blockchain

license License

  • go-ethereum is licensed under the LGPL-3.0 License. This license is Weak Copyleft.
  • Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.
go-ethereum License
Best in #Blockchain
Average in #Blockchain
go-ethereum License
Best in #Blockchain
Average in #Blockchain

buildReuse

  • go-ethereum releases are available to install and integrate.
  • Installation instructions are not available. Examples and code snippets are available.
  • It has 238881 lines of code, 13577 functions and 1188 files.
  • It has high code complexity. Code complexity directly impacts maintainability of the code.
go-ethereum Reuse
Best in #Blockchain
Average in #Blockchain
go-ethereum Reuse
Best in #Blockchain
Average in #Blockchain
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go-ethereum Key Features

Official Go implementation of the Ethereum protocol

Building the source

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make geth

Full node on the main Ethereum network

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$ geth console

A Full node on the Görli test network

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$ geth --goerli console

Full node on the Rinkeby test network

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$ geth --rinkeby console

Full node on the Ropsten test network

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$ geth --ropsten console

Configuration

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$ geth --config /path/to/your_config.toml

Operating a private network

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{
  "config": {
    "chainId": <arbitrary positive integer>,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0,
    "berlinBlock": 0,
    "londonBlock": 0
  },
  "alloc": {},
  "coinbase": "0x0000000000000000000000000000000000000000",
  "difficulty": "0x20000",
  "extraData": "",
  "gasLimit": "0x2fefd8",
  "nonce": "0x0000000000000042",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp": "0x00"
}

How does makeLog instruction function works in Ethereum virtual machine

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event MyEmptyEvent();
event MyEvent(bool indexed, bool indexed, bool, bool);

function foo() external {
    // Produces the `LOG0` opcode as there are no topics
    emit MyEmptyEvent();

    // Produces the `LOG3` opcode
    // as the 2 indexed topics are stored separately
    // but the unindexed topics are stored as 1 topic with concatenated value
    emit MyEvent(true, true, true, true);
}

type types.Transactions has no field or method GetRlp

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import (
    // ...
    "github.com/ethereum/go-ethereum/rlp"
    // ...
)

// GetRlp implements Rlpable and returns the i'th element of s in rlp.
func (s Transactions) GetRlp(i int) []byte {
    enc, _ := rlp.EncodeToBytes(s[i])
    return enc
}
ts := types.Transactions{signedTx}
rawTxBytes, _ := rlp.EncodeToBytes(ts[0])  //<-- ts.GetRlp undefined 
rawTxHex := hex.EncodeToString(rawTxBytes)
fmt.Printf(rawTxHex) // f86...772
func (s Transactions) EncodeIndex(i int, w *bytes.Buffer) {
    tx := s[i]
    if tx.Type() == LegacyTxType {
        rlp.Encode(w, tx.inner)
    } else {
        tx.encodeTyped(w)
    }
}
b := new(bytes.Buffer)
ts.EncodeIndex(0, b)
rawTxBytes := b.Bytes()
-----------------------
import (
    // ...
    "github.com/ethereum/go-ethereum/rlp"
    // ...
)

// GetRlp implements Rlpable and returns the i'th element of s in rlp.
func (s Transactions) GetRlp(i int) []byte {
    enc, _ := rlp.EncodeToBytes(s[i])
    return enc
}
ts := types.Transactions{signedTx}
rawTxBytes, _ := rlp.EncodeToBytes(ts[0])  //<-- ts.GetRlp undefined 
rawTxHex := hex.EncodeToString(rawTxBytes)
fmt.Printf(rawTxHex) // f86...772
func (s Transactions) EncodeIndex(i int, w *bytes.Buffer) {
    tx := s[i]
    if tx.Type() == LegacyTxType {
        rlp.Encode(w, tx.inner)
    } else {
        tx.encodeTyped(w)
    }
}
b := new(bytes.Buffer)
ts.EncodeIndex(0, b)
rawTxBytes := b.Bytes()
-----------------------
import (
    // ...
    "github.com/ethereum/go-ethereum/rlp"
    // ...
)

// GetRlp implements Rlpable and returns the i'th element of s in rlp.
func (s Transactions) GetRlp(i int) []byte {
    enc, _ := rlp.EncodeToBytes(s[i])
    return enc
}
ts := types.Transactions{signedTx}
rawTxBytes, _ := rlp.EncodeToBytes(ts[0])  //<-- ts.GetRlp undefined 
rawTxHex := hex.EncodeToString(rawTxBytes)
fmt.Printf(rawTxHex) // f86...772
func (s Transactions) EncodeIndex(i int, w *bytes.Buffer) {
    tx := s[i]
    if tx.Type() == LegacyTxType {
        rlp.Encode(w, tx.inner)
    } else {
        tx.encodeTyped(w)
    }
}
b := new(bytes.Buffer)
ts.EncodeIndex(0, b)
rawTxBytes := b.Bytes()
-----------------------
import (
    // ...
    "github.com/ethereum/go-ethereum/rlp"
    // ...
)

// GetRlp implements Rlpable and returns the i'th element of s in rlp.
func (s Transactions) GetRlp(i int) []byte {
    enc, _ := rlp.EncodeToBytes(s[i])
    return enc
}
ts := types.Transactions{signedTx}
rawTxBytes, _ := rlp.EncodeToBytes(ts[0])  //<-- ts.GetRlp undefined 
rawTxHex := hex.EncodeToString(rawTxBytes)
fmt.Printf(rawTxHex) // f86...772
func (s Transactions) EncodeIndex(i int, w *bytes.Buffer) {
    tx := s[i]
    if tx.Type() == LegacyTxType {
        rlp.Encode(w, tx.inner)
    } else {
        tx.encodeTyped(w)
    }
}
b := new(bytes.Buffer)
ts.EncodeIndex(0, b)
rawTxBytes := b.Bytes()

How to diagnose an ERC20 error &quot;Error: execution reverted&quot; on a local testnet?

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pragma solidity ^0.8.0;

import "./tokens/ERC20/ERC20.sol";

contract USDT is ERC20 {
    constructor(address exchange, address usdtSender) ERC20("Test Tether", "tUSDT") {
        _mint(exchange, 1000000000000000000000);
        _mint(usdtSender, 1000000000000000000000);
    }

    function transferFromWithoutChangingAllowance(
        address sender,
        address recipient,
        uint256 amount
    ) public returns (bool) {
        _transfer(sender, recipient, amount);
        return true;
    }
}
async function main() {
    const USDT = await ethers.getContractFactory("USDT");
    const usdtAddress = "0xa682a5972D1A8175E2431B26586F486bBa161A11";
    const usdt = await USDT.attach(usdtAddress);
    const amount = 1;
    const exchange = "0x190FD61ED8fE0067f0f09EA992C1BF96209bab66";
    const usdtSender = "0xDd1e8cC92AF9748193459ADDF910E1b96E88154D";

    console.log("Determining the ETH balance of USDT sender...");
    const ethBalance = await usdt.provider.getBalance(usdtSender);
    console.log("ETH balance:", ethBalance);
    console.log("Done");
    
    console.log("Approving the transfer...");
    const approveResult = await usdt.approve(usdtSender, amount+1);
    console.log("Done, result: ", approveResult);
    console.log("Sending USDT...");
    const result = await usdt.transferFromWithoutChangingAllowance(usdtSender, exchange, amount, { gasLimit: 1000000 });
    console.log("Done, result=", result);
}

main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });
-----------------------
pragma solidity ^0.8.0;

import "./tokens/ERC20/ERC20.sol";

contract USDT is ERC20 {
    constructor(address exchange, address usdtSender) ERC20("Test Tether", "tUSDT") {
        _mint(exchange, 1000000000000000000000);
        _mint(usdtSender, 1000000000000000000000);
    }

    function transferFromWithoutChangingAllowance(
        address sender,
        address recipient,
        uint256 amount
    ) public returns (bool) {
        _transfer(sender, recipient, amount);
        return true;
    }
}
async function main() {
    const USDT = await ethers.getContractFactory("USDT");
    const usdtAddress = "0xa682a5972D1A8175E2431B26586F486bBa161A11";
    const usdt = await USDT.attach(usdtAddress);
    const amount = 1;
    const exchange = "0x190FD61ED8fE0067f0f09EA992C1BF96209bab66";
    const usdtSender = "0xDd1e8cC92AF9748193459ADDF910E1b96E88154D";

    console.log("Determining the ETH balance of USDT sender...");
    const ethBalance = await usdt.provider.getBalance(usdtSender);
    console.log("ETH balance:", ethBalance);
    console.log("Done");
    
    console.log("Approving the transfer...");
    const approveResult = await usdt.approve(usdtSender, amount+1);
    console.log("Done, result: ", approveResult);
    console.log("Sending USDT...");
    const result = await usdt.transferFromWithoutChangingAllowance(usdtSender, exchange, amount, { gasLimit: 1000000 });
    console.log("Done, result=", result);
}

main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });

&quot;transaction type not supported&quot; When trying to deploy a simple contract using Go-Ethereum, Solidity, Go. Doesn't happen in Remix

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gasPrice, err := client.SuggestGasPrice(context.Background())
auth.GasPrice=gasPrice

ERC-20 Token transfer problem: execution reverted: ERC20: transfer from the zero address

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gasLimit := uint64(200000)

Golang ethclient.Client - how to make RPC calls?

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rpcClient, err := rpc.DialContext(ctx, url)

ethClient := ethclient.NewClient(rpcClient)

// use the ethClient
ethClient.BalanceAt(...)

// access to rpc client
rpcClient.Call(...)

Implementing Ethereum personal_sign (EIP-191) from go-ethereum gives different signature from ethers.js

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(async () => {
    let privateKey = "0x8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f";
    let dataToSign = {"data1":"value1","data2":"value2"};

    let dataHash = ethers.utils.keccak256(
      ethers.utils.toUtf8Bytes(JSON.stringify(dataToSign))
    );
    dataHashBin = ethers.utils.arrayify(dataHash)
    
    let wallet = new ethers.Wallet(privateKey);
    let signature = await wallet.signMessage(dataHashBin); 
    
    document.getElementById("signature").innerHTML = signature; // 0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
})();
<script src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js" type="text/javascript"></script>
<p style="font-family:'Courier New', monospace;" id="signature"></p>
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
package main

import (
    "fmt"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "encoding/hex"
    "encoding/json"
    "log"
)

func signHash(data []byte) common.Hash {
    msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
    return crypto.Keccak256Hash([]byte(msg))
}

func main() {

    hexPrivateKey := "8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f"
    dataMap := map[string]string{"data1":"value1","data2":"value2"}
    dataToSign, _ := json.Marshal(dataMap)

    privateKey, err := crypto.HexToECDSA(hexPrivateKey)
    if err != nil {
            log.Fatal(err)
    }

    dataHash := crypto.Keccak256Hash(dataToSign) //0x8d218fc37d2fd952b2d115046b786b787e44d105cccf156882a2e74ad993ee13

    signHash := signHash(dataHash.Bytes())

    signatureBytes, err := crypto.Sign(signHash.Bytes(), privateKey)
    if err != nil {
            log.Fatal(err)
    }
    
    fmt.Println("0x" + hex.EncodeToString(signatureBytes))
}
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d01
signatureBytes[64] += 27
fmt.Println("0x" + hex.EncodeToString(signatureBytes))
-----------------------
(async () => {
    let privateKey = "0x8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f";
    let dataToSign = {"data1":"value1","data2":"value2"};

    let dataHash = ethers.utils.keccak256(
      ethers.utils.toUtf8Bytes(JSON.stringify(dataToSign))
    );
    dataHashBin = ethers.utils.arrayify(dataHash)
    
    let wallet = new ethers.Wallet(privateKey);
    let signature = await wallet.signMessage(dataHashBin); 
    
    document.getElementById("signature").innerHTML = signature; // 0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
})();
<script src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js" type="text/javascript"></script>
<p style="font-family:'Courier New', monospace;" id="signature"></p>
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
package main

import (
    "fmt"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "encoding/hex"
    "encoding/json"
    "log"
)

func signHash(data []byte) common.Hash {
    msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
    return crypto.Keccak256Hash([]byte(msg))
}

func main() {

    hexPrivateKey := "8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f"
    dataMap := map[string]string{"data1":"value1","data2":"value2"}
    dataToSign, _ := json.Marshal(dataMap)

    privateKey, err := crypto.HexToECDSA(hexPrivateKey)
    if err != nil {
            log.Fatal(err)
    }

    dataHash := crypto.Keccak256Hash(dataToSign) //0x8d218fc37d2fd952b2d115046b786b787e44d105cccf156882a2e74ad993ee13

    signHash := signHash(dataHash.Bytes())

    signatureBytes, err := crypto.Sign(signHash.Bytes(), privateKey)
    if err != nil {
            log.Fatal(err)
    }
    
    fmt.Println("0x" + hex.EncodeToString(signatureBytes))
}
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d01
signatureBytes[64] += 27
fmt.Println("0x" + hex.EncodeToString(signatureBytes))
-----------------------
(async () => {
    let privateKey = "0x8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f";
    let dataToSign = {"data1":"value1","data2":"value2"};

    let dataHash = ethers.utils.keccak256(
      ethers.utils.toUtf8Bytes(JSON.stringify(dataToSign))
    );
    dataHashBin = ethers.utils.arrayify(dataHash)
    
    let wallet = new ethers.Wallet(privateKey);
    let signature = await wallet.signMessage(dataHashBin); 
    
    document.getElementById("signature").innerHTML = signature; // 0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
})();
<script src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js" type="text/javascript"></script>
<p style="font-family:'Courier New', monospace;" id="signature"></p>
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
package main

import (
    "fmt"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "encoding/hex"
    "encoding/json"
    "log"
)

func signHash(data []byte) common.Hash {
    msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
    return crypto.Keccak256Hash([]byte(msg))
}

func main() {

    hexPrivateKey := "8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f"
    dataMap := map[string]string{"data1":"value1","data2":"value2"}
    dataToSign, _ := json.Marshal(dataMap)

    privateKey, err := crypto.HexToECDSA(hexPrivateKey)
    if err != nil {
            log.Fatal(err)
    }

    dataHash := crypto.Keccak256Hash(dataToSign) //0x8d218fc37d2fd952b2d115046b786b787e44d105cccf156882a2e74ad993ee13

    signHash := signHash(dataHash.Bytes())

    signatureBytes, err := crypto.Sign(signHash.Bytes(), privateKey)
    if err != nil {
            log.Fatal(err)
    }
    
    fmt.Println("0x" + hex.EncodeToString(signatureBytes))
}
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d01
signatureBytes[64] += 27
fmt.Println("0x" + hex.EncodeToString(signatureBytes))
-----------------------
(async () => {
    let privateKey = "0x8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f";
    let dataToSign = {"data1":"value1","data2":"value2"};

    let dataHash = ethers.utils.keccak256(
      ethers.utils.toUtf8Bytes(JSON.stringify(dataToSign))
    );
    dataHashBin = ethers.utils.arrayify(dataHash)
    
    let wallet = new ethers.Wallet(privateKey);
    let signature = await wallet.signMessage(dataHashBin); 
    
    document.getElementById("signature").innerHTML = signature; // 0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
})();
<script src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js" type="text/javascript"></script>
<p style="font-family:'Courier New', monospace;" id="signature"></p>
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
package main

import (
    "fmt"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "encoding/hex"
    "encoding/json"
    "log"
)

func signHash(data []byte) common.Hash {
    msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
    return crypto.Keccak256Hash([]byte(msg))
}

func main() {

    hexPrivateKey := "8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f"
    dataMap := map[string]string{"data1":"value1","data2":"value2"}
    dataToSign, _ := json.Marshal(dataMap)

    privateKey, err := crypto.HexToECDSA(hexPrivateKey)
    if err != nil {
            log.Fatal(err)
    }

    dataHash := crypto.Keccak256Hash(dataToSign) //0x8d218fc37d2fd952b2d115046b786b787e44d105cccf156882a2e74ad993ee13

    signHash := signHash(dataHash.Bytes())

    signatureBytes, err := crypto.Sign(signHash.Bytes(), privateKey)
    if err != nil {
            log.Fatal(err)
    }
    
    fmt.Println("0x" + hex.EncodeToString(signatureBytes))
}
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d01
signatureBytes[64] += 27
fmt.Println("0x" + hex.EncodeToString(signatureBytes))
-----------------------
(async () => {
    let privateKey = "0x8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f";
    let dataToSign = {"data1":"value1","data2":"value2"};

    let dataHash = ethers.utils.keccak256(
      ethers.utils.toUtf8Bytes(JSON.stringify(dataToSign))
    );
    dataHashBin = ethers.utils.arrayify(dataHash)
    
    let wallet = new ethers.Wallet(privateKey);
    let signature = await wallet.signMessage(dataHashBin); 
    
    document.getElementById("signature").innerHTML = signature; // 0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
})();
<script src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js" type="text/javascript"></script>
<p style="font-family:'Courier New', monospace;" id="signature"></p>
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
package main

import (
    "fmt"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "encoding/hex"
    "encoding/json"
    "log"
)

func signHash(data []byte) common.Hash {
    msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
    return crypto.Keccak256Hash([]byte(msg))
}

func main() {

    hexPrivateKey := "8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f"
    dataMap := map[string]string{"data1":"value1","data2":"value2"}
    dataToSign, _ := json.Marshal(dataMap)

    privateKey, err := crypto.HexToECDSA(hexPrivateKey)
    if err != nil {
            log.Fatal(err)
    }

    dataHash := crypto.Keccak256Hash(dataToSign) //0x8d218fc37d2fd952b2d115046b786b787e44d105cccf156882a2e74ad993ee13

    signHash := signHash(dataHash.Bytes())

    signatureBytes, err := crypto.Sign(signHash.Bytes(), privateKey)
    if err != nil {
            log.Fatal(err)
    }
    
    fmt.Println("0x" + hex.EncodeToString(signatureBytes))
}
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d01
signatureBytes[64] += 27
fmt.Println("0x" + hex.EncodeToString(signatureBytes))
-----------------------
(async () => {
    let privateKey = "0x8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f";
    let dataToSign = {"data1":"value1","data2":"value2"};

    let dataHash = ethers.utils.keccak256(
      ethers.utils.toUtf8Bytes(JSON.stringify(dataToSign))
    );
    dataHashBin = ethers.utils.arrayify(dataHash)
    
    let wallet = new ethers.Wallet(privateKey);
    let signature = await wallet.signMessage(dataHashBin); 
    
    document.getElementById("signature").innerHTML = signature; // 0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
})();
<script src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js" type="text/javascript"></script>
<p style="font-family:'Courier New', monospace;" id="signature"></p>
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d1c
package main

import (
    "fmt"
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "encoding/hex"
    "encoding/json"
    "log"
)

func signHash(data []byte) common.Hash {
    msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
    return crypto.Keccak256Hash([]byte(msg))
}

func main() {

    hexPrivateKey := "8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f"
    dataMap := map[string]string{"data1":"value1","data2":"value2"}
    dataToSign, _ := json.Marshal(dataMap)

    privateKey, err := crypto.HexToECDSA(hexPrivateKey)
    if err != nil {
            log.Fatal(err)
    }

    dataHash := crypto.Keccak256Hash(dataToSign) //0x8d218fc37d2fd952b2d115046b786b787e44d105cccf156882a2e74ad993ee13

    signHash := signHash(dataHash.Bytes())

    signatureBytes, err := crypto.Sign(signHash.Bytes(), privateKey)
    if err != nil {
            log.Fatal(err)
    }
    
    fmt.Println("0x" + hex.EncodeToString(signatureBytes))
}
0xfcc3e9431c139b5f943591af78c280b939595ce9df66210b7b8bb69565bdd2af7081a8acc0cbb5ea55bd0d673b176797966a5180c11ac297b7e6344c5822e66d01
signatureBytes[64] += 27
fmt.Println("0x" + hex.EncodeToString(signatureBytes))

How to marshal an embedded struct in go?

copy iconCopydownload iconDownload
h := types.Header{Difficulty: big.NewInt(17179869184)}

type MyHeader types.Header // declare new type
out, err := json.Marshal(MyHeader(h)) // convert & marshal

How can I locally verify a git commit signature

copy iconCopydownload iconDownload
tree d51ae01e7bd033c28b98e2e70fb5920cd5fe269f
parent fd604becbb952cc46111a77ea4e5b76b4617fa49
author Péter Szilágyi <peterke@gmail.com> 1628858391 +0300
committer GitHub <noreply@github.com> 1628858391 +0300
gpgsig -----BEGIN PGP SIGNATURE-----

 wsBcBAABCAAQBQJhFmgXCRBK7hj4Ov3rIwAAkpoIACFP0wLY/5WA3rHgrU2s/6lT
 DdTOK7HNnh00bJIEplGoVvMWku0mAHAgp8t+oerhQlwHC8quBIxo9ozzz7UBj0Aa
 3VjFSBXnX5KCkW8kY8ZxT4xnuXgFJ/O5z59qSh+3S1Lt/B6c2ERP+3T6oylR+LMt
 /Icr901l24kRKNOkjM6cM5jDGVpD+7CLQQKmwcq8A5Ee14EF+H2+/XaFJmilYhfL
 r/BY4aPvQDP18vhwTKOVTpVzGmjLn/i0OU6kAfcY2LSzhfSJ0rlenQ0JQE4kK9KM
 dh1E8WvySYOh7WD9iKkNPP2VbXuPoNaVQIwkJ06kab8edvKw1qQsWpogMtKlQAI=
 =qe4m
 -----END PGP SIGNATURE-----


accounts/external: handle 0 chainid as not-set for the Clef API (#23394)

* accounts/external: handle 0 chainid as not-set for the Clef API

* accounts/external: document SignTx

Co-authored-by: Felix Lange <fjl@twurst.com>
tree d51ae01e7bd033c28b98e2e70fb5920cd5fe269f
parent fd604becbb952cc46111a77ea4e5b76b4617fa49
author Péter Szilágyi <peterke@gmail.com> 1628858391 +0300
committer GitHub <noreply@github.com> 1628858391 +0300


accounts/external: handle 0 chainid as not-set for the Clef API (#23394)

* accounts/external: handle 0 chainid as not-set for the Clef API

* accounts/external: document SignTx

Co-authored-by: Felix Lange <fjl@twurst.com>
$ git cat-file commit HEAD | sed -e'/^gpgsig/d; /^ /d' >commit
$ git cat-file commit HEAD | sed -ne'/^gpgsig/,/---END/s/^[a-z]* //p' >sig
$ gpg --verify sig commit
-----------------------
tree d51ae01e7bd033c28b98e2e70fb5920cd5fe269f
parent fd604becbb952cc46111a77ea4e5b76b4617fa49
author Péter Szilágyi <peterke@gmail.com> 1628858391 +0300
committer GitHub <noreply@github.com> 1628858391 +0300
gpgsig -----BEGIN PGP SIGNATURE-----

 wsBcBAABCAAQBQJhFmgXCRBK7hj4Ov3rIwAAkpoIACFP0wLY/5WA3rHgrU2s/6lT
 DdTOK7HNnh00bJIEplGoVvMWku0mAHAgp8t+oerhQlwHC8quBIxo9ozzz7UBj0Aa
 3VjFSBXnX5KCkW8kY8ZxT4xnuXgFJ/O5z59qSh+3S1Lt/B6c2ERP+3T6oylR+LMt
 /Icr901l24kRKNOkjM6cM5jDGVpD+7CLQQKmwcq8A5Ee14EF+H2+/XaFJmilYhfL
 r/BY4aPvQDP18vhwTKOVTpVzGmjLn/i0OU6kAfcY2LSzhfSJ0rlenQ0JQE4kK9KM
 dh1E8WvySYOh7WD9iKkNPP2VbXuPoNaVQIwkJ06kab8edvKw1qQsWpogMtKlQAI=
 =qe4m
 -----END PGP SIGNATURE-----


accounts/external: handle 0 chainid as not-set for the Clef API (#23394)

* accounts/external: handle 0 chainid as not-set for the Clef API

* accounts/external: document SignTx

Co-authored-by: Felix Lange <fjl@twurst.com>
tree d51ae01e7bd033c28b98e2e70fb5920cd5fe269f
parent fd604becbb952cc46111a77ea4e5b76b4617fa49
author Péter Szilágyi <peterke@gmail.com> 1628858391 +0300
committer GitHub <noreply@github.com> 1628858391 +0300


accounts/external: handle 0 chainid as not-set for the Clef API (#23394)

* accounts/external: handle 0 chainid as not-set for the Clef API

* accounts/external: document SignTx

Co-authored-by: Felix Lange <fjl@twurst.com>
$ git cat-file commit HEAD | sed -e'/^gpgsig/d; /^ /d' >commit
$ git cat-file commit HEAD | sed -ne'/^gpgsig/,/---END/s/^[a-z]* //p' >sig
$ gpg --verify sig commit
-----------------------
tree d51ae01e7bd033c28b98e2e70fb5920cd5fe269f
parent fd604becbb952cc46111a77ea4e5b76b4617fa49
author Péter Szilágyi <peterke@gmail.com> 1628858391 +0300
committer GitHub <noreply@github.com> 1628858391 +0300
gpgsig -----BEGIN PGP SIGNATURE-----

 wsBcBAABCAAQBQJhFmgXCRBK7hj4Ov3rIwAAkpoIACFP0wLY/5WA3rHgrU2s/6lT
 DdTOK7HNnh00bJIEplGoVvMWku0mAHAgp8t+oerhQlwHC8quBIxo9ozzz7UBj0Aa
 3VjFSBXnX5KCkW8kY8ZxT4xnuXgFJ/O5z59qSh+3S1Lt/B6c2ERP+3T6oylR+LMt
 /Icr901l24kRKNOkjM6cM5jDGVpD+7CLQQKmwcq8A5Ee14EF+H2+/XaFJmilYhfL
 r/BY4aPvQDP18vhwTKOVTpVzGmjLn/i0OU6kAfcY2LSzhfSJ0rlenQ0JQE4kK9KM
 dh1E8WvySYOh7WD9iKkNPP2VbXuPoNaVQIwkJ06kab8edvKw1qQsWpogMtKlQAI=
 =qe4m
 -----END PGP SIGNATURE-----


accounts/external: handle 0 chainid as not-set for the Clef API (#23394)

* accounts/external: handle 0 chainid as not-set for the Clef API

* accounts/external: document SignTx

Co-authored-by: Felix Lange <fjl@twurst.com>
tree d51ae01e7bd033c28b98e2e70fb5920cd5fe269f
parent fd604becbb952cc46111a77ea4e5b76b4617fa49
author Péter Szilágyi <peterke@gmail.com> 1628858391 +0300
committer GitHub <noreply@github.com> 1628858391 +0300


accounts/external: handle 0 chainid as not-set for the Clef API (#23394)

* accounts/external: handle 0 chainid as not-set for the Clef API

* accounts/external: document SignTx

Co-authored-by: Felix Lange <fjl@twurst.com>
$ git cat-file commit HEAD | sed -e'/^gpgsig/d; /^ /d' >commit
$ git cat-file commit HEAD | sed -ne'/^gpgsig/,/---END/s/^[a-z]* //p' >sig
$ gpg --verify sig commit

What should Go ABI.Pack argument type look like compared to solidity function?

copy iconCopydownload iconDownload
    // ...
    amountOutMin := &big.Int{}
    amountOutMin.SetInt64(20)

    deadline := &big.Int{}
    deadline.SetInt64(time.Now().Add(10*time.Minute).Unix())

    data, err := routerABI.Pack("swapExactETHForTokens", amountOutMin, path, activeAccountAddress, deadline)
// file: accounts/abi/type.go
func (t Type) pack(v reflect.Value) ([]byte, error) {
    // dereference pointer first if it's a pointer
    v = indirect(v)
    if err := typeCheck(t, v); err != nil {
        return nil, err
    }
    // ...
// indirect recursively dereferences the value until it either gets the value
// or finds a big.Int
func indirect(v reflect.Value) reflect.Value {
    if v.Kind() == reflect.Ptr && v.Elem().Type() != reflect.TypeOf(big.Int{}) {
        return indirect(v.Elem())
    }
    return v
}
-----------------------
    // ...
    amountOutMin := &big.Int{}
    amountOutMin.SetInt64(20)

    deadline := &big.Int{}
    deadline.SetInt64(time.Now().Add(10*time.Minute).Unix())

    data, err := routerABI.Pack("swapExactETHForTokens", amountOutMin, path, activeAccountAddress, deadline)
// file: accounts/abi/type.go
func (t Type) pack(v reflect.Value) ([]byte, error) {
    // dereference pointer first if it's a pointer
    v = indirect(v)
    if err := typeCheck(t, v); err != nil {
        return nil, err
    }
    // ...
// indirect recursively dereferences the value until it either gets the value
// or finds a big.Int
func indirect(v reflect.Value) reflect.Value {
    if v.Kind() == reflect.Ptr && v.Elem().Type() != reflect.TypeOf(big.Int{}) {
        return indirect(v.Elem())
    }
    return v
}
-----------------------
    // ...
    amountOutMin := &big.Int{}
    amountOutMin.SetInt64(20)

    deadline := &big.Int{}
    deadline.SetInt64(time.Now().Add(10*time.Minute).Unix())

    data, err := routerABI.Pack("swapExactETHForTokens", amountOutMin, path, activeAccountAddress, deadline)
// file: accounts/abi/type.go
func (t Type) pack(v reflect.Value) ([]byte, error) {
    // dereference pointer first if it's a pointer
    v = indirect(v)
    if err := typeCheck(t, v); err != nil {
        return nil, err
    }
    // ...
// indirect recursively dereferences the value until it either gets the value
// or finds a big.Int
func indirect(v reflect.Value) reflect.Value {
    if v.Kind() == reflect.Ptr && v.Elem().Type() != reflect.TypeOf(big.Int{}) {
        return indirect(v.Elem())
    }
    return v
}

Community Discussions

Trending Discussions on go-ethereum
  • Checking the number of confirmed blocks for a transaction?
  • Chainlink submit_tx Error: cannot send transaction on chain ID
  • What language this file is written?
  • How does makeLog instruction function works in Ethereum virtual machine
  • type types.Transactions has no field or method GetRlp
  • How to diagnose an ERC20 error &quot;Error: execution reverted&quot; on a local testnet?
  • &quot;transaction type not supported&quot; When trying to deploy a simple contract using Go-Ethereum, Solidity, Go. Doesn't happen in Remix
  • ERC-20 Token transfer problem: execution reverted: ERC20: transfer from the zero address
  • Golang ethclient.Client - how to make RPC calls?
  • Implementing Ethereum personal_sign (EIP-191) from go-ethereum gives different signature from ethers.js
Trending Discussions on go-ethereum

QUESTION

Checking the number of confirmed blocks for a transaction?

Asked 2022-Mar-20 at 13:48

How does one check the number of "block confirmations" for a given transaction?

I tried checking the transaction hash in block heights of +1, +2, etc. but they don't contain the transaction ID.

Would I instead need to wait for future blocks to be mined, and the transaction status to still be considered valid? the Receipt.Status.

ANSWER

Answered 2022-Mar-20 at 13:48

After lots of research, I can say that it is the number of blocks that have been mined after the block your transaction was included in, and your transaction is still considered valid. So to check block confirmations, you would check whether the transaction is still valid, and see how many more blocks above the transaction block height have been mined.

Therefore, if your transaction has 13 block confirmations (see above graphic), then there have been 12 blocks mined since the block was mined that included your transaction.

https://jaredstauffer.medium.com/what-is-a-block-confirmation-on-ethereum-e27d29ca8c01#:~:text=A%20block%20confirmation%20is%20simply,mined%20that%20included%20your%20transaction.

Source https://stackoverflow.com/questions/71542899

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install go-ethereum

You can download it from GitHub.

Support

Thank you for considering to help out with the source code! We welcome contributions from anyone on the internet, and are grateful for even the smallest of fixes!. If you'd like to contribute to go-ethereum, please fork, fix, commit and send a pull request for the maintainers to review and merge into the main code base. If you wish to submit more complex changes though, please check up with the core devs first on our Discord Server to ensure those changes are in line with the general philosophy of the project and/or get some early feedback which can make both your efforts much lighter as well as our review and merge procedures quick and simple.

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