Questions tagged [golang]
Questions related to the Go programming language
168
questions
0
votes
0answers
8 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 ...
0
votes
0answers
6 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?
0
votes
0answers
8 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 ...
0
votes
1answer
12 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 ...
1
vote
0answers
15 views
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 ...
0
votes
1answer
15 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/...
1
vote
0answers
39 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() {
...
0
votes
0answers
13 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 ...
0
votes
0answers
34 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 ...
0
votes
1answer
46 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..
}
/**
...
0
votes
0answers
15 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 ...
0
votes
1answer
44 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-...
3
votes
0answers
40 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 ...
1
vote
0answers
20 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 ...
0
votes
0answers
38 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"
...
1
vote
0answers
381 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 ...
0
votes
1answer
23 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?
0
votes
1answer
222 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/...
0
votes
0answers
14 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 ...
0
votes
0answers
24 views
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 ...
0
votes
1answer
30 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 ...
0
votes
0answers
18 views
Ethereum light client and verifying proofs in Go programming language
I am looking to write or integrate a toy Ethereum light client in Go-based applications to see how easily other (Tendermind / Cosmos) based blockchains could verify proofs from Ethereum main chain. ...
0
votes
0answers
73 views
using “eth_sendRawTransaction” by Go but got invalid argument 0: json: cannot unmarshal non-string into Go value of type hexutil.Bytes
I signed my transaction and my transaction used the standard structure: *types.Transaction
here is my transaction:
to := common.HexToAddress(toStr)
gasPrice_ :=new(big.Int).SetUint64(gasPrice)
...
0
votes
1answer
244 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;
...
0
votes
0answers
132 views
How uploaded form in golang store files in ipfs?
I have uploaded form written in golang and I want that when user upload file, it goes to ipfs not save in local directory. I used daemon and go-ipfs-api package to upload directory in ipfs but how ...
0
votes
1answer
64 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 ...
0
votes
0answers
37 views
Abigen doesn't create free data retrieval call for public state variable
I'm looking at an example contract using go-ethereum. In the book, when a go file is created in Store.sol through abigen, the code that automatically gets the Version() string is generated. However, ...
0
votes
0answers
22 views
What is the difference in the two mapping structures
Is the below mapping structure a legit way to create a restricted mapping, or is the latter best practice?
mapping(address => SomeStruct)[5] private structs;
and
mapping(address => mapping(...
2
votes
0answers
136 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 ...
1
vote
1answer
265 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 ...
1
vote
1answer
906 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 ...
1
vote
1answer
41 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 (...
0
votes
1answer
78 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 ...
1
vote
0answers
94 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, ...
1
vote
0answers
38 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/...
1
vote
1answer
1k 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 ...
1
vote
0answers
36 views
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 ...
0
votes
1answer
47 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"
...
0
votes
1answer
20 views
Balance returning zero after sending KETH to it
I have sent the following transactions to the account 0x2D76d8729F9Cfa5bC3CEba8a504400FE30bb53D2:
0x8667bd1859a5ccc99bcc77b38c5453195bf32b308b4038ae409b47b002546344
...
2
votes
0answers
29 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 ...
0
votes
0answers
94 views
How it works with modified go-ethereum source code
I modified go-ethereum source code and built it. I am wondering if I want to test and run geth with the modified source code in mainnet or testnet, and how it works in the mainnet or testnet.
How to ...
0
votes
1answer
525 views
Decode transaction inputs with go-ethereum
When making a contract transaction using go-ethereum (golang) how can I decode the transaction inputs.
Specifically
Given a tx.Data []byte , the contract's contractABI abi.ABI and the method that ...
0
votes
1answer
111 views
How is Ethereum Virtual Machine (EVM) isolated (sandboxed)?
I always had this question in mind:
What are the used technologies, in order to achieve the isolation of the EVM? does it just run as an isolated process in its own namespaces using the linux feature ...
2
votes
1answer
666 views
Different outputs for Keccak256(), which one is right?
To get a value from contract storage I used this geth code succesfully:
var contractAddress = '0x88e726de6cbadc47159c6ccd4f7868ae7a037730'
var index = '...
asked Aug 22 '19 at 10:24
Juan Ignacio Pérez Sacristán
2,9427 gold badges33 silver badges63 bronze badges
1
vote
1answer
120 views
Subscribe to events using local geth in light mode?
I've followed this guide to subscribe to events. I succesfully subscribed to the new block headers using Infura provider. But when I try to use local geth node syncing in light mode, it connects, but ...
1
vote
0answers
39 views
Retrieving a State_object value on go-ethereum
I have a deployed contract address and I need to query a contract storage value, a token account balance that is stored on a mapping variable:
mapping (address => uint256) balances;
From go-...
asked Aug 5 '19 at 9:49
Juan Ignacio Pérez Sacristán
2,9427 gold badges33 silver badges63 bronze badges
0
votes
1answer
399 views
Is there a web3 api written in golang to interact with Eth nodes?
I'm looking for a library that can easily interact with Ethereum nodes that is similar to Web3.js.
go-ethereum is written entirely in go so I would of thought I could write scripts pretty easily.
1
vote
1answer
376 views
Connecting my Golang Backend server with Metamask
I'm trying to build a Ticket-Office project in one of my courses at the University.
The project uses a backend server (which I'm writing in Golang) and it should be able to deploy and use smart ...
1
vote
1answer
165 views
How can I make new account by JSON-RPC of Go
I'd like to make new account by JSON-RPC.I've checked the wiki of Ethereum, however I could not find out how to do that.
I've found call existed accounts, but it isn't what I want.
eth_accounts
...
2
votes
0answers
41 views
How to add or modify account_signTransaction function
In this github.com/ethereum/go-ethereum/accounts/external/backend.go of Ethereum project i see the "account_signTransaction" function and i want to edit or update the logic for this function, where ...
