All Questions
Tagged with golang go-ethereum
187 questions
1
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0
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642
views
How to add a custom JSON RPC endpoint to geth?
I would like to add custom RPC method to geth. I found this question:
How to add a custom JSON-RPC endpoint to geth?. But it does not work...
What I did:
1. https://github.com/ethereum/go-ethereum
2. ...
- 191
1
vote
0
answers
589
views
Geth: Simulated Backend?
I recently stumbled upon SimulatedBackend struct while browsing the code. I noticed that it has a constructor (i.e. NewSimulatedBackendWithDatabase) which accepts the path to the node's LevelDB, which ...
1
vote
0
answers
274
views
Golang - Help gnosis transaction hash not calculated right
I have been trying to submit a transaction to gnosis rinkeby api but always the server response is that the hash is not correct and suggest's the lazy way which is not safe for what I want to do so I ...
- 11
1
vote
2
answers
422
views
how to manually craft tx data in golang WITHOUT ethclient
how do i manually craft tx data (the actual DATA field in a tx) in golang without ethclient? i am trying to craft tx data to be signed later. lets assume i am trying to call a solidity function like ...
- 135
1
vote
1
answer
921
views
Deploy smart contracts using golang
I tried to deploy smart contracts using go and go-ethereum.
To deploy it, I use sendTransaction function from go-ethereum library, but when i check it on ropsten explorer, it just a basic transaction ...
- 123
0
votes
1
answer
126
views
Start and HTTP JSON-RPC geth on android?
Is it possible to change the code in /mobile to allow for a json-rpc api to be spawned on an android?
Or is there something I need to do in Java with the NodeConfig?
I already managed to run a light-...
1
vote
0
answers
403
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 ...
- 111
1
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0
answers
65
views
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 ...
- 143
0
votes
0
answers
236
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....
0
votes
0
answers
33
views
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 ...
- 3
1
vote
1
answer
2k
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 ...
- 11
1
vote
1
answer
894
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 ...
- 21
0
votes
2
answers
57
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/...
- 58
2
votes
1
answer
613
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
1
answer
2k
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
1
answer
384
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-...
user66883
1
vote
0
answers
72
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 ...
- 283
0
votes
1
answer
32
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
1
answer
2k
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/...
- 33
0
votes
1
answer
89
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 ...
- 1
0
votes
1
answer
2k
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;
...
- 1
1
vote
1
answer
1k
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 ...
- 11
2
votes
1
answer
305
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 ...
- 419
3
votes
1
answer
3k
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 ...
- 611
1
vote
1
answer
188
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 (...
- 1,954
1
vote
1
answer
408
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, ...
- 11
1
vote
0
answers
83
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/...
- 11
3
votes
1
answer
5k
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 ...
- 695
1
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0
answers
61
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 ...
- 424
0
votes
1
answer
83
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"
...
- 1,260
0
votes
1
answer
32
views
Balance returning zero after sending KETH to it
I have sent the following transactions to the account 0x2D76d8729F9Cfa5bC3CEba8a504400FE30bb53D2:
0x8667bd1859a5ccc99bcc77b38c5453195bf32b308b4038ae409b47b002546344
...
- 1,260
0
votes
0
answers
232
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 ...
- 73
0
votes
1
answer
3k
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 ...
- 994
0
votes
1
answer
323
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 ...
- 98
2
votes
1
answer
463
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 ...
- 425
1
vote
0
answers
79
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-...
0
votes
1
answer
1k
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.
- 21
1
vote
1
answer
2k
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
1
answer
446
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
...
- 11
2
votes
0
answers
82
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 ...
- 19
1
vote
1
answer
522
views
The EVM throws an error "invalid opcode 0x1c" [duplicate]
I have written a simple smart contract that allows to store a string, and I'am trying to use go-ethereum(which is similar to web3j).
When I execute a transaction, I have this error
VM returned ...
- 196
1
vote
1
answer
255
views
How to programmatically check the type of Ethereum node/backend that I'm connected to using Go?
I'm aware that I can do this using CURL like so:
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":67}' https://the-node-ip-...
0
votes
1
answer
610
views
connecting geth to web3.go 1.0 via websockets or HTTP
Is there anyThing similar to web3.js written in go that allows me to communicate with the geth client ?
- 196
3
votes
1
answer
278
views
How to get an evm reference inside go-ethereum GetBalance function?
In order to modify GetBalance function to fork go-ethereum, I find difficulties to get a reference of the running evm. The function has a reference for self *StateDB:
func (self *StateDB) GetBalance(...
0
votes
1
answer
127
views
Reading genesis config on GoLang
In a custom fork of Ethereum my team is developing, we need to read a new config parameter from genesis block. At https://github.com/ethereum/go-ethereum/blob/master/cmd/evm/runner.go#L100 the code ...
4
votes
1
answer
3k
views
Calling contract method internally from geth code
On developing a custom geth fork there is the need to call a specific hardcoded smart contract when ETH transfer occur. This is not an Ethereum normal behaviour but a new feature we want to implement ...
2
votes
0
answers
1k
views
No contract code at give address
Its a bit of a long question...
I am using Go to deploy a Smart Contract using the following code:
client, err := ethclient.Dial("http://localhost:8545")
if err != nil {
errorhandler.HandleErr(...
- 141
0
votes
1
answer
540
views
Genesis allocation and (address, balance) tuples
On go-ethereum souce code at core\genesis_alloc.go(19):
...
package core
// Constants containing the genesis allocation of built-in genesis blocks.
// Their content is an RLP-encoded list of (...
1
vote
0
answers
196
views
Handling EOF when subscribing to Event Logs
I'm trying to subscribe to events logs to handle Transfer(address,address,uint64) events. I've followed this example.
https://github.com/miguelmota/ethereum-development-with-go-book/blob/master/en/...
8
votes
6
answers
5k
views
Given a RAW Transaction - how to get senders address
Is it possible to get the senders address using golang when all you have is the raw transaction string. I can decode it and get the nonce, hash, to etc as these are all exported functions from the ...
- 447