Questions tagged [golang]

Questions related to the Go programming language

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10 views

How to generate a proper EIP712Domain signature transaction

I'm working a crowding contract in solidity. The contract has been deployed and I also generated a Go ABI. I've managed to generate the transaction hash and sign it using web3.js by hooking into bind....
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1answer
37 views

Why is my contract so expensive to deploy?

I've tried to deploy a contract based on openzeppelin library (see below). The fee I paid is about $146 and the contract didn't even deploy(i.e it run out of gas ). I find this unbelievable high. It ...
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36 views

Exit function in POS Bridge go-ethereum

I'm trying to follow the POS bridge steps for transfer an ER20 token from ethereum görli testnet to polygon (mumbai testnet). I've accomplished the approval, deposit and burn steps. Nevertheless, in ...
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How to mark a message as read in golang

How to mark a message as read in golang How to write a go code to mark as read after the message has been read.
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Best Way to Estimate Gas, Flashbots [duplicate]

I am writing an arbitrage bot that leverages the Flashbots bundle. For those who don't know, if you submit transaction through flashbots if the transaction revert, then you don't pay any gas. My ...
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14 views

How does geth tests do code gen?

I'm trying to understand how the ethereum test related geth golang code work. I'm stuck at how the test json files are processed. https://github.com/ethereum/go-ethereum/blob/master/tests/...
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7 views

Error: could not import signer account while build the project in golang

hi all I am getting the error while running faucet.go with the command ./build/bin/faucet now I am facing the error:- CRIT [09-15|13:11:25.287] Failed to import faucet signer account err="...
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37 views

Enhancing geth subscription processing to be able to work with transaction data

I'm thinking to have a geth "extension" that would be working with a Geth subscriptions. I would like to filter over pending transactions. When I'm searching in the code I can see that I can ...
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10 views

Is there a light weight way to read smart-contract data using Golang?

I would like to have access to a way to read smart contract data (for example the number of decimals of an ERC20 token) using golang. Of course, one way would be to use abigen and instantiate a ...
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Expose aditional APIs via Go Geth Ethereum Client

I am asking more experienced Go Geth developers what is the module that is in charge of exposing variables on the Geth Console / RPC. What I need is to expose the variable containing the addresses in ...
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22 views

geth is not attached with JavaScript console

I am Nikhil Upadhyay I am trying to connect geth with javaScript Console but it didn't work for me here are few steps which I already tried but could not resolve it geth attach ipc:gethDataDir/ geth....
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Transferring tokens with Geth: what's outdated about this tutorial?

I'm using this e-book to learn about using go-ethereum, but it's pretty outdated. I'm on the part about transferring tokens and I'm getting an invalid opcode when estimating gas. I have a private key ...
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229 views

Call getReserves() from goweb3

I've been using https://github.com/umbracle/go-web3 as my go web3 library, and I am having trouble finding out how to call the "function getReserves(address factory, address tokenA, address ...
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112 views

How to create a USDT wallet on both ERC20 and TRC20 networks using HD wallet?

Suppose I am creating an exchange cryptocurrency such as Binance and I have a main account with both public and private keys. I want to create a Tether wallet (USDT) for any new user registering, ...
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79 views

1Inch Swap with Go Return amount is not enough

I'm attempting to do a swap with 1Inch and Go but an error of "Return amount is not enough" is returned. The token has been approved and I have tried adjusting the slippage to 10% without ...
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7 views

Can i get step by step instructions to fork GETH [duplicate]

Can I get step-by-step instructions to fork GETH then make a public node with a private network RPC, chain id, and native coin?
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1answer
51 views

types.NewTx instead of types.NewTransaction

var data []byte tx := types.NewTransaction(nonce, toAddress, value, gasLimit, gasPrice, data) signedTx, err := types.SignTx(tx, types.HomesteadSigner{}, privateKey) NewTransaction is ...
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1answer
22 views

Properly using consensus/ethash module in go-ethereum

Traditionally, Ethereum pools used the deprecated Ethash, which is quite inconvenient to use with modern golang, specifically around the usage of Go modules. Examples of this are Sammy007's Open ...
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what should golang abi.pack argument looks like compared to solidity function

The following code is a popular solidity ethereum function function: swapExactETHForTokens(uint256 amountOutMin, address[] path, address to, uint256 deadline) what should amountOutMin type look like ...
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1answer
22 views

Setup Quorum Blockchain

I am setting up a quorum blockchain on my computer. According to the official documentation, I have to first clone the git repo and give the following command: git clone https://github.com/Consensys/...
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73 views

Problem with deploying the precompiled contract bytecode in genesis.json file

I am trying to add this simple test contract dumb.sol to my genesis.json file. pragma solidity <0.8.6; contract Dumb { string public name; string public symbol; constructor() { ...
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20 views

Chainlink Initiators - Failed testing subscriber: unexpected end of JSON input

I am trying to customize Chainlink External Initiators, since the blockchain is fork of Ethereum. I am simulating the eth.go and created my own version. After updating the program, triggered the ...
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153 views

go-ethereum: watching contract for events

I've been trying to get a go program going that monitors a smart contract for emitted events. I had found the amazingly written https://goethereumbook.org/event-read-erc20/ unfortunately it appears to ...
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1answer
149 views

ParserError: Expected '{' but got 'constant'

This is my error message ParserError: Expected '{' but got 'constant' --> amkcoin.sol:50:35: | 50 | function totalSupply() public constant returns (uint); | ^^^^^^^^ and this is code line.. } /** ...
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32 views

How to subscribe to the txpool / mempool of an external node using go-ethereum client?

Currently im trying to learn go by rebuild my already existing nodejs application but im facing the issue to not find a resource regarding the usage/ to consume a txpool from a given websocket ...
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1answer
81 views

Get smart contract info from transaction

Lets take for example this, we can see that it did not transfer any ether, it interacts with a contract (that's why there's the stamp of the contract creation/execution). Is there a way to get in go-...
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62 views

Retrieving the sender of a transaction

I am trying to retrieve the sender address within a transaction in Go and I am facing some issues. As I understand, in order to retrieve the sender of a transaction, you can either try to get the ...
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25 views

Could Insufficient Funds error mean the signature is incorrect? - using golang and raw transactions

I want to sign a transaction "offline" without using crypto.sign. The code looks like the following: unsignedTx := types.NewTransaction(nonce, to, amount, gasLimit, gasPrice, nil) networkID ...
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49 views

Issue with go-ethereum on freebsd

I got an issue when I am trying to run a sample test code via go to access my full node. Consider the following code snippet: package main import ( "context" "fmt" "log" ...
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597 views

How to pull data from DeFi Liquidity Pools

I am relatively new to decentralised development, and apologies in advance if a bit of a dumb question. I am doing a project where I am looking to download the following data. I am trying to figure ...
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1answer
25 views

I'm here to run the official Go-Ethereum repo. How can i do that?

I want to run go-ethereum in my own PC. Is there any instruction about this? How they deployed it?
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1answer
496 views

Monitoring pending transactions with Go

I'm trying to write a program in Go to watch pending transactions, using a geth full node that I'm connected to over websockets. I'm pretty sure I have to use the github.com/ethereum/go-ethereum/eth/...
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16 views

Open Source Gateway

When I launch an Ethereum Node, I would like to offer it as a gateway to other developers, to do this I would need to throttle control the access, and give the developers an Activation key. Is there ...
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I want to fork Ethereum with my own implementation. Like changing name or block size or something like this [duplicate]

I'm such a noob or may be this is a noob type question i just want to fork Ethereum in go(maybe in another language) with my own implementation. Anyone can guide me about that?? Is there any relevant ...
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1answer
31 views

Ethereum miner does not produce blocks

first time Mining! Watching a YouTube Tutorial about Blockchain basics and it shows how to set up a Genesis Block as well as how to start Mining. I've followed all the steps to the best of my ...
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1answer
430 views

Issues with autogenerated go file while using abigen

I have a simple sol file message.sol pragma solidity >=0.5.10; contract Message { string public message; constructor(string memory initMessage) public { message = initMessage; ...
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1answer
108 views

How do I receive a revert message using go-ethereum

How do I receive a revert message using go-ethereum? receipt, err := bind.WaitMined(context.Background(), client, tx) if err != nil { fmt.Errorf(err) } fmt.Println(receipt.Status) Now I can only ...
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1answer
63 views

How to solve the "cannot find package" error in GoLand?

I just imported the go-ethereum project in GoLand. But the configuration shows the error below, how to solve it?
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164 views

UnhandledPromiseRejectionWarning: Error: nonce generation function failed or private key is invalid in Ganache

In Go I am using go-ethereum to read data from the ethereum smart contract. My smart contract is maintained with truffle. I am trying to fetch candidate information based on candidate id. I have a ...
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1answer
347 views

How to calculate CREATE2 address in golang?

I have a factory pattern smart contract that creates other smart-contracts by cloning the master smart contract via Minimal Proxy Contract and CREATE2 opcode. What is the proper way to calculate ...
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1answer
1k views

How to install solc of a specific version?

I want to install solc 0.4.24 but the commands given below installs the new version. sudo add-apt-repository ppa:ethereum/ethereum sudo apt-get update sudo apt-get install solc Or sudo snap install ...
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1answer
52 views

Plans to migrate go-ethereum to rust-ethereum?

Is anyone planning to migrate go-ethereum to rust-ethereum? Rust with all its features such as zero-cost abstractions, safe memory management, fearless concurrency really outshines Go. Nathan Aw (...
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1answer
96 views

Generate directory hash without upload using Swarm API

I am using the Swarm API (github.com/ethersphere/swarm/) with go to upload a directory on a private network. The client API(/api/client) provides a UploadDirectory function which returns a manifest ...
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132 views

go-ethereum: Return data from contract function

I have a smart contract written in solidity. I deployed the contract to my Ganache network and I can interact with it via go-ethereum using stubs generated by abigen. My function returns a uint256, ...
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40 views

Getting Blockchain Domains From Transaction Hashes

I am compiling a list of some blockchain domains (.eth, .crypto, etc.) and was wondering what would be the best approach. My strategy is to take something like this: https://etherscan.io/address/...
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1answer
2k views

How do I increase the amount of memory geth can use for cache?

I'm running geth on a system with 96GB of memory, soon to be bumped up to 192GB. I currently start geth with --cache 32768 but I plan to double it when my memory is upgraded. However, I've noticed ...
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Geth's golang contract bindings need "RPC subscription features that are still under review" to process event logs. What are those features?

The documentation for Geth's golang contract bindings start out with Please note, events are not yet implemented as they need some RPC subscription features that are still under review. What ...
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1answer
49 views

Infura node seems to crash when tryining to deploy contract

I am trying to deploy a contract and run some tests on the functions within it. Here is what my code currently looks like: package main import ( "context" "crypto/rand" "encoding/hex" ...
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1answer
23 views

Balance returning zero after sending KETH to it

I have sent the following transactions to the account 0x2D76d8729F9Cfa5bC3CEba8a504400FE30bb53D2: 0x8667bd1859a5ccc99bcc77b38c5453195bf32b308b4038ae409b47b002546344 ...
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0answers
30 views

How to reduce corruption in developing countries using Ethereum [closed]

I would like an honest opinion on whether or not the picture below is self-explanatory. I would also like to know what more functionalities I can add to reduce the capital flight by government ...