All Questions
235 questions
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
2
votes
2
answers
582
views
Golang Equivalent to list accounts on node - web3.eth.Accounts()
Does anyone know if its possible to get a list of the accounts on a node using golang, after Dialing to the node, basic PoC would be assuming the accounts are already unlocked via the CLI
Basically ...
- 447
2
votes
1
answer
3k
views
ethereumjs-abi equivalent for Golang?
ethereumjs-abi is great for easily ABI encoding and decoding in javascript. Is there an equivalently simple package for Golang?
Geth's accounts/abipackage does this, but there's a lot of setup and it'...
- 1,367
2
votes
1
answer
930
views
How to run local VM from golang?
I am going to run the virtual ethereum machine from the code, pass to it a compiled smart contract code.
But I do not know how to do it.
It's my code:
package main
import (
"context"
"...
- 129
2
votes
1
answer
2k
views
How to send signed transaction to Ropsten through INFURA in Golang
I want to send and broadcast a signed transaction by sender to the Ropsten network through INFURA in Golang.
I was able to send a signed transaction and recieved a response from INFURA as per below, ...
- 424
2
votes
1
answer
1k
views
Using Golang how to get the number of transactions in a block
I cant seem to find any way to get the number or transactions within a block using the block number in golang.. anyone have any idea how to do this
- 447
2
votes
1
answer
1k
views
Developing native dapps with Go
so I was looking around for a decent up-to-date tutorial to start developing native dapps (C++ or GO doesn't really matter), but I can't seem to find a concise tutorial rather than this one. Can ...
- 33
2
votes
1
answer
323
views
How to modify the gasLimit of the private block chain on the console
as the title,How to modify the "gasLimit" of the private block chain on the console?
- 21
2
votes
3
answers
1k
views
Frameworks or Alternatives to create smart contracts/ETH using Golang
Hi guys I'm new to smart contracts, and I'm experimenting with Ethereum. I would like to use golang in my developments so:
Are there frameworks for developing smart contracts with Ethereum using go?
...
user9831
2
votes
1
answer
2k
views
Geth 1.4.10 invalid command line parameters
I've upgraded my geth client to version 1.4.10-stable-5f55d95a (from 1.3.5) and now it won't run with the following command line arguments (the documentation is lackluster when it comes to describing ...
- 5,284
2
votes
1
answer
459
views
Generate r, s, v permit signature variables off chain using Golang
I'm trying to generate a signature in line with https://eips.ethereum.org/EIPS/eip-712
so that I can permit spending of tokens without having to call Approve() first.
this is my code so far:
func ...
- 43
2
votes
1
answer
725
views
How to use contractAbi.Unpack to parse raw log data into a log type struct
I am following the guide here but I am not able to replicate what is being done in the guide.
var transferEvent LogTransfer
err := contractAbi.Unpack(&transferEvent, "Transfer", vLog....
2
votes
1
answer
2k
views
Transaction Effective Gas Price
I am developing in Go and I have a question that I have been looking for the solution for a long time and I am not able to find it.
How can I find the effective gas price used in the transaction? Not ...
- 21
2
votes
1
answer
1k
views
Cannot get transaction's field "From" using Golang
How I can get transaction's field "From"?
client, err := ethclient.Dial("https://mainnet.infura.io")
if err != nil {
log.Fatal(err)
}
blockNumber := big.NewInt(5671744)
block, err := client....
- 33
2
votes
1
answer
540
views
go lang installation error - raspberrypi
I needed to create privatenet in raspberrypi and installed go1.9. Cloned geth, extracted it. When 'make geth' command is passed I get following error. Please help me out
github.com/ethereum/go-...
- 1,061
2
votes
1
answer
605
views
How to convert MEW signature to go-ethereum acceptable signature for verification
NOTE: Sorry in advance, some links are without https:// and have sign / turned to \ because I don't have enough reputation to post more than 2 links)
I want to verify the signature made on MEW (link) ...
- 131
2
votes
2
answers
3k
views
How to access the event log by knowing the contract address (golang)?
At the moment I develope dapps that use smart contract as storage for specific data. I use abigen to generate specific go binding to my contract. If someone try change state of the contract I use ...
- 23
2
votes
1
answer
718
views
How to setup the account manager type to sign transactions in Go?
TL;DR:
I've setup a private Ethereum node, and I want to send a signed transaction to it. By reading the docs I know that there's an account Manager type which can access a Wallet type which has a ...
- 854
2
votes
1
answer
455
views
Create IPC Client
I just recently updated my local repo of go-ethereum to commit 8ec6ccc54d1da7bbaa87bd0b489b1778ea729c90
I previously used the IPC Client like this in my code:
var client rpc.Client
if len(...
- 803
2
votes
1
answer
475
views
How are addresses created if deploying a new bound contract
How exactly are the contract addresses created that are returned by the DeployNewXYZ() method a bound contracts? Is it possible that, if the method is called rapidly consecutively, the same address is ...
- 803
2
votes
1
answer
125
views
Why is the same set of bytes encoded base58 differently?
I want to generate a bip32 private root key based on bip39 seed. I found an article with python code, copied it to myself and executed it, getting a valid private root key (checked here). Then I wrote ...
- 115
2
votes
0
answers
487
views
Simulate transaction replacement on go-ethereum SimulatedBackend
i'm writing in go-lang and using go-ethereum package to interact with nodes. For testing purposes go-ethereum provides blockhchain simulation via SimulatedBackend (https://github.com/ethereum/go-...
2
votes
0
answers
1k
views
Getting ALL pending tx from txPool
I'm working on top of geth in golang. My first goal would be to stream all pending transactions from the txPool.
The problem is that when I run my script, I can't manage to catch 100% of pending ...
- 21
2
votes
0
answers
215
views
Subscribe to smart contract using go-ethereum
I am trying to subscribe to certain smart contract using go-ethereum.
Here is the example of my function
client, err := ethclient.Dial(config.AppConfig.SmartcontractHost)
if err != nil {
log.Fatal(...
- 203
2
votes
0
answers
468
views
Reading TxPool using GO
Hello I am trying to learn Go and have not been able to figure out how to get pending transactions. I was reading the following link but I am not sure what I should be importing:
https://geth.ethereum....
- 21
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() {
...
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
2
votes
0
answers
34
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 ...
- 53
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
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
2
votes
1
answer
963
views
Invalid transaction signature on sending transaction
Hello guys I'm having a "Invalid transaction signature." error. Can't get pass this one. Am I missing something?
client, err := ethclient.Dial("path/to/geth.ipc")
if err != nil {
return err
}
ks :...
- 41
2
votes
1
answer
247
views
Transactions Mined Status in Go Lang
I have a private block chain setup. I am calling a smart contract method from Go Lang. I my code in GoLang should wait until the transaction got mined. How I can achieve that.
Regards
AKM
- 321
2
votes
1
answer
695
views
getTransactionByHash function is not available in the go-ethereum package
In have downloaded go-ethereum package and made the private network. I am able to make changes in the code as per my requirement and it is also working fine. However, ethereum_js.go file has the ...
- 201
1
vote
2
answers
3k
views
Is it possible to create a unique hash inside geth?
When we make a transaction call, we get the transaction hash right away. As mentioned here we could not get transaction's hash inside the contract's function. Would it be good idea to set a variable ...
- 8,404
1
vote
1
answer
5k
views
bower vs web3 vs nodejs vs golang apis
What benefits does the use of following bring to my Ethereum application if I wish to interact smart contracts for sending multiple transactions, upload files on blockchain, etc.?
bower
web3js
...
- 433
1
vote
1
answer
213
views
Compiling two smart contracts it the same folder cause duplicates
When I compile two contracts in the same folder I get duplicates. The following contracts, Store.sol
pragma solidity ^0.8.0;
contract Store {
event ItemSet(bytes32 key, bytes32 value);
...
- 167
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
2k
views
Local caching database for fast retrieval
I'm currently working on dApps for a private blockchain based on ethereum. While it works fine and the dApps really show the power of the blockchain it lacks the speed and versatility of a SQL ...
1
vote
2
answers
148
views
How to analyze a tx data?
Given a transaction of type types.Transaction (golang go-ethereum), how can I analyze the data field and check if it has a swap or a sync event?
I know that ...
1
vote
1
answer
1k
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 ...
- 23
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
2k
views
Golang binding - call contract method and get its return value or tuple?
Suppose i have contract like:
pragma solidity ^0.4.11;
contract MyToken {
uint256 a;
function SimpleGetter() returns(string) {
return "something";
}
function DoTheGreat(address _to) ...
- 115
1
vote
1
answer
2k
views
go-ethereum keccak256 multi value byte slice does not match solidity keccak256
I have a smart contract with the following function:
function testHash(
address _sender,
uint8 _method,
uint256 _number,
uint256 _amount)
public
returns (bytes32)
{
...
- 1,593
1
vote
1
answer
735
views
Adding JSON-RPC call in geth
I want to build a custom version of geth that provides a new JSON-RPC call to clients.
It looks like there are two pieces to make that happen: (1) a Go implementation in internal/ethapi/api.go, and (...
- 301
1
vote
1
answer
3k
views
Get ERC20 Tokens Transferred Information from Transaction Hash
I am building very simple Golang program to get transaction details from HASH.
I am able to get the information of any transaction but I am unable to get information what ERC20 token was transferred ...
- 175
1
vote
1
answer
1k
views
Subscription for newBlocks golang
I have followed this guide and wrote the same code but instead of getting the latest block, I am getting this,
Subscription Failed => The method newBlocks_newBlocks does not exist/is not ...
- 65
1
vote
3
answers
4k
views
Create Ethereum Account using golang
I want to create ethereum account using golang. I am following this guide but I am stuck with errors just at the beginning of code.
accountManager:=accounts.NewManager(".ethereum/rinkeby/keystore",...
- 65
1
vote
1
answer
3k
views
Using go to make a contract call without private key like web3 does?
I'm working on moving a node project of ours over to a go project and I've run into an issue:
web3.eth.defaultAccount = web3.eth.accounts[0];
In node using web3 this is all I had to do for every ...
- 433
1
vote
1
answer
161
views
The official library for work with ethereum payments
I looking for way to generate ether wallet (priv-pub pair), handle incoming transaction to that wallet and make/push to network transaction from it.
How to do that via go-ethereum or pyethereum (full ...
- 79
1
vote
1
answer
667
views
go-ethereum rpc connection via http for native dapps
For native dapps we can establish an rcp connection over IPC using
conn, err := rpc.NewIPCClient("/home/karalabe/.ethereum/testnet/geth.ipc")
Now what if I want to establish an rpc connection over ...
- 143