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Questions tagged [go-ethereum]

go-ethereum, also known as geth, is a Go implementation of the Ethereum protocol. Use this tag for questions about creating or writing code for a geth-based Ethereum service.

go-ethereum is the most widely used client implementation for Ethereum.

Command Line Options

Install on Mac

Install brew...

brew update
brew upgrade

Install Ethereum

brew tap ethereum/ethereum
brew install ethereum

Install on Windows

Download the latest stable binary, extract it, download the zip file, extract geth.exe from zip, open a command terminal and type:

chdir <path to extracted binary>
open geth.exe

Install on Linux

sudo apt-get install software-properties-common
sudo add-apt-repository -y ppa:ethereum/ethereum
sudo apt-get update
sudo apt-get install ethereum
430 questions
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What is the of use Web3.providers.HttpProvider("")

I want to interact with a smart contract using web3js. Every example will start with following var Web3 = require('web3'); var web3 = new Web3('http://localhost:8545'); // or var web3 = new Web3(new…
Divya Galla
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The field extraData is 97 bytes, but should be 32. It is quite likely that you are connected to a POA chain

I deployed a private network via geth and posted a smart contract there. Accounts are set in the genesis block I'm creating a python function in which I want to call a smart contract function import web3 import json class Estate(): with…
Ilya
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Ethereum LES getProofsV2 Always Returns [] (Empty Nodes)

I'm unable to get an Ethereum LES getProofsV2 (or getProofs) request to produce a ProofsV2 (or Proofs) response with anything but an empty array of Nodes. This is for a request targeted to a GETH node open to LES connections. The request arguments…
GoZoner
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How to fix 'write tcp 127.0.0.1:54917->127.0.0.1:8545: i/o timeout' error in golang code that listens to smart contract events

I am using golang to listen to the smart contract events. I deployed my contracts to ganache ui and ganache-cli ports. But I get the below error: ➜ sc_events go run main.go 2019/04/17 14:25:04 write tcp 127.0.0.1:54917->127.0.0.1:8545: i/o…
Sudharsan Ravikumar
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Geth ecrecover invalid signature recovery id

I'm trying to verify signature passed in from client using the geth golang library. I'm getting the sample data (signature / address) from one of my cryptokitties accounts (I can see it in the request). If I paste the blow credentials into…
Levon Tamrazov
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How to authenticate and send contract method using web3.js 1.0

I am confused about how I should be executing a contract's method using the web3 1.0 library. This code works (so long as I manually unlock the account first): var contract = new web3.eth.Contract(contractJson, contractAddress); contract.methods …
Nick Young
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Panic: max fee per gas less than block base fee: address 0xbc8153EE0b1E9B1f1E8153945400dc38EDbD8638, maxFeePerGas: 1 baseFee: 875000000

I found the following example for working with the SimulatedBackend. Until recently that worked fine, however this code now results in a panic (panic: max fee per gas less than block base fee: address 0xbc8153EE0b1E9B1f1E8153945400dc38EDbD8638,…
Arjan van Eersel
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9
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How can I convert a *big.Int into a byte array in golang

Im trying to do calculations on a big int number and then convert the result to a byte array, but I cannot figure out how to do so this is where Im at so far. anyone got any ideas sum := big.NewInt(0) for _, num := range balances { sum =…
Kravitz
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Data on Private Ethereum blockchain lost/disappears after couple of days

I am deploying a private ethereum blockchain (geth) on a virtual machine on Azure. Upon deploying my Solidity contracts on the blockchain and launching my NodeJS application to it, I am able to add data normally through web apis of the nodejs…
Ghassan Zein
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How can we get token holders from token?

I have created my own ERC-20 token (AJR) and deploy on Ethereum private node, Now I want to list all the transaction by Token name. Also, I need to list down all the token holders by using contract address or token name. I try to fetch using web3…
Trimantra Software Solution
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Can we get transaction information recorded in the past block using Solidity in the Smart contract?

I am studying blockchain with Ethereum, and I want to use past transaction data in the Smart contract using Solidity. If I use Web3.js module in the program written in javascript, I can get these data easily. But I can't get these data in the Smart…
i20gyawa
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Clique POA Signed recently must wait for others

This is my first time on this i hope somebody can understand my grammar and question. I have created 2 nodes using puppeth and choosing Clique for my private Ethereum. Both nodes are sealer (verify on both nodes using clique.getSigners()) and both…
qarina teal
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Unable to attach to remote geth: Invalid pipe address '/.rinkeby/geth.ipc'

I'm on Windows trying to connect to Ethereum Testnet via rinkeby. I downloaded geth 1.8.2 and Ethereum Wallet 0.9.3 I gave 1st command as: geth --rinkeby --fast --cache=1024 NOTE: after above command, I get the url on cmd…
PrashantNagawade
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geth option "--allow-insecure-unlock", what exactly does it mean?

The doc on github says: --allow-insecure-unlock Allow insecure account unlocking when account-related RPCs are exposed by http And, I have to add the option when start geth, otherwise can't unlock the account. Questions What does…
Eric
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Why is my Ethereum block number 0 in geth, even though the sync is nearly complete?

> w3.eth.syncing AttributeDict({ 'currentBlock': 5787386, 'highestBlock': 5787491, 'knownStates': 138355583, 'pulledStates': 138341120, 'startingBlock': 5787335, }) > w3.eth.blockNumber 0 I had done full sync but blocknumber is always 0.
pan12jian
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