Questions tagged [go-ethereum]
Go Ethereum (short: Geth) is a Golang implementation of the Ethereum protocol.
4,568
questions
1
vote
1answer
21 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
1answer
21 views
Problems syncing small private net consisting of 2 PC miner nodes and 3 Raspberry Pi nodes
I've read countless posts referencing some form of "Synchronisation failed, dropping peer err='retrieved hash chain is invalid'" and of the few that had solutions, none of them worked for me.
I ...
0
votes
1answer
36 views
How to get notification right after account has received eth by geth?
My server stores many accounts.
How do i know when and what account has received eth or i have to check them manually one by one by looping many address to check the balance?
account := common....
2
votes
1answer
100 views
Solidity Error Address / Address Payable
I'm currently learning solidity programming to create a basic smart contract based on a 2018 tutorial where solidity was using version 4. I'm currently using truffle v5.0.21. I understand that there ...
1
vote
1answer
45 views
web3 unlock account error
I have two geth nodes, each has an account:
node1(IP:192.168.43.12): account1
node2(IP:192.168.43.39): account2
the two accounts are created using geth --datadir /root/chain/node1/data account new, ...
1
vote
2answers
51 views
Storage/Retrieval of mapped structure data
I want to store the structure data in a mapping i.e. if I have a student structure as described below, then I should be able to have a myriad of students and distinguish between them using wallet ...
0
votes
1answer
22 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 ?
0
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1answer
54 views
How to test the fuctionality of a Bittrex-related smart contract?
I've got my hands on a smart contract related to the Bittrex exchange.
I would like to deploy this smart contract to test the functionality but I don't know how to call the functions properly. My ...
4
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2answers
253 views
Offchain vs Sidechain vs StateChannel
What are the main differences between off-chain, sidechain and state channel? And what are the use-cases of all of these?
0
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0answers
15 views
Interoperability between different DLT/Blockchain
I read about Polkadot, Ion, Komodo, POA and many others projects.
But my question is: are there any project to provide interoperability between public Ethereum and other blockchain/DLTs already ...
3
votes
1answer
19 views
Cipher Suites - open source?
Some time ago, a vulnerability was discovered in IOTA because the team implemented the cipher algorithm by themselves instead of using open source (more tested) implementation.
I can conclude Ethereum ...
2
votes
1answer
58 views
Errors in when compiling the BLS signature in remix?
Etherum can verify BLS signatures, In this answer Does Ethereum support pairing operations?
There is an example of how to verify BLS in solidity. However, when I tried to test the code in remix,
...
1
vote
1answer
72 views
How to measure size of stored data in the blockchain?
I know that remix can measure the execution cost and transaction cost. I want to measure the storage overhead ( Size of data in Bytes) on creating a contract on the etherum blockchain or calling a ...
0
votes
1answer
19 views
Is there any way to hide or encryt input data that sent to smartcontract? [duplicate]
After a While working with ethereum, I felt ethereum is not only public and also naked because whatever input data that we sent to contract function, it is visible to everyone when looked into the ...
0
votes
1answer
38 views
extract address of used library
Is there anyway or method to extract the address of a linked library from the contract bytecode (not a verified contract code) or deployment transaction?
my question is about step 3:
step 1. ...
0
votes
2answers
29 views
condition check of struct mapping in solidity?
struct User {
string username;
string password;
address userid;
bool isAdmin;
}
mapping (uint => User) users;
function checkIfUserExists(address userid) public ...
0
votes
2answers
64 views
how to get contract address after its been mined with web3.js
I have tried to deploy a SmartContract from web3.js node library, I am getting a transaction hash from it but how would I get the contract address after It's been mined by a miner?
here is my code
...
3
votes
2answers
164 views
Verifying Modular exponentiation operation in etherum
I have Alice who should do some cryptographic operations off-chain. Then a smart contact has to verify equality by performing Modular exponentiation operation.
I attached an image of the off-chain ...
1
vote
1answer
78 views
Updating ERC20 Contract from 0.4.0 to 0.6.0
Im updating some ERC20 contact code from solidity 0.4.0 to 0.6.0 and hitting some snags as it seems openzeppeling has changed its structure since then as can be expected.
I cant access the balances ...
1
vote
0answers
33 views
Extra mining fees added in etherbase account
1st scenario -
I have set miner.setEtherbase(eth.accounts[1]) and gasPrize is 0.
1 coin Transaction -
And done transaction from 0th account to one random account. I expect 0 mining fees will add ...
1
vote
1answer
40 views
How to access Parity node's mempool with web3.py?
I'm running a Parity node with parity --jsonrpc-api all, then connecting to it in python3 with w3 = web3.Web3(web3.HTTPProvider('http://localhost:8545')).
I can call print(w3.eth.getBlock('latest'))...
0
votes
0answers
35 views
React + Ethereum + Solidity. Private Blockchain ether mining issue?
I'm making an app using react, ethereum and solidity.
I'm signing up the user using..
web3.eth.personal.newAccount();
Then all users need to do certain tasks on app. They need to do certain ...
0
votes
1answer
44 views
Block signer address question
I set up a private clique POA chain with 3 nodes, all of them are sealers.
I launch two nodes only, the blocks can be signed by the two nodes.
when I call clique.getSignersAtHash('block hash value'),...
0
votes
1answer
73 views
geth never completes syncing for rinkeby
My aim is to synchronise a full node for the Rinkeby network.
It seems that geth does not finish synchronisation. I have had it run for over three days, but it is stuck at the last few blocks.
> ...
0
votes
1answer
79 views
miner.start() is not a function?
"web3": "^1.0.0-beta.37"
"web3": "^1.0.0-beta.55"
import {Miner} from 'web3-eth-miner';
then
const options = {
defaultAccount: "0x78dB3e2129D58685444989dD9682DDDC70dd3C82",
...
0
votes
0answers
21 views
What's the block header's difference between POW and POA chain?
I want to simulate the processing procedure, from block generation to header verification, on private POA chain, and look into the variables during process.
What nodejs modules can be used(not ...
0
votes
1answer
43 views
which port I use when I want to connect remix to my local quorum network?
I want to deploy a smart contract on my local network. I executed a local node via
PRIVATE_CONFIG=ignore nohup geth --datadir ./Node1/new-
node-1
--nodiscover --verbosity 5 --networkid ...
0
votes
0answers
30 views
What way there is to implement a new signing scheme in Ethereum?
I want to deploy a new signing scheme for the Ethereum transactions as an alternative to the currently implemented ECDSA. This will be for future research purposes on post-quantum signing schemes.
The ...
0
votes
1answer
36 views
getTransactionCount return different response
geth version 1.8.27
The pending nonce is 8 at first, then I send a transaction and use eth.getTransactionCount to get the next pending nonce.
> eth.getTransactionCount("...
0
votes
2answers
59 views
Public key validation through private key
What is a good way to validate that the public key claimed to belong to a particular user really belongs to him without revealing the associated private key? Can this be done with zero-knowledge ...
0
votes
0answers
45 views
Solc complier error “TypeError: Cannot read property 'TestToken.sol' of undefined”
I set up a contract with three files referring to Token Factory.
I make a test on remix online tool, they can be successfully compiled.
when I'm tring to compile them by solc module in a .js file, ...
1
vote
1answer
88 views
Sending a raw transaction
I'm trying to send ether from one address to another. I have a valid generated address and a private key for that. I have a node is working on Linux in fullmode and RPC server listening on the default ...
0
votes
1answer
17 views
How to specify nonce value of ERC token transfer?
I use the code lines below to set nonce and transfer ERC20 token from account to another:
var count = await web3.eth.getTransactionCount(myAddress);
await contract.methods.transfer(destAddress,amount)...
0
votes
1answer
45 views
web3 call contract function problem
I use latest version stable geth:
[root@localhost ~]# geth version
WARN [05-30|06:27:22.750] Sanitizing cache to Go's GC limits provided=1024 updated=612
Geth
Version: 1.8.27-stable
Git Commit: ...
0
votes
1answer
24 views
Initialize an array of struct within a struct
I am working on a use case of "Purchase Order" wherein there will be multiple Products listed/ordered under one Purchase Order(PO) by a buyer.
1 PO : N Products
struct Product{
bytes32 ...
1
vote
0answers
45 views
My wallet got hacked - I do not know what do to
Someone hacked my eth wallet and when ever I deposit ethereum to the wallet my deposited ethereum is sent directly to his wallet automatically.. Pls how can I stop this issue because my wallet has my ...
3
votes
1answer
82 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(...
asked May 28 at 15:00
Juan Ignacio Pérez Sacristán
1,2053 gold badges23 silver badges56 bronze badges
0
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0answers
18 views
How include Nethereum in an existing C# project as library
I try to include nethereum as a library in my C# project, so I have access to the appropriate functions (create transaction data, sign transaction data and so on...) for communicate to an arbitrary ...
1
vote
0answers
25 views
Can I run a javascript file using geth attach?
I want to automatize one thing. Aftert installing the Quorum nodes, I have to run:
docker exec -it quorum_node1_1 geth attach /qdata/dd/geth.ipc
Then I am pasting the JS code
But I want to ...
1
vote
1answer
40 views
Database version problem
I found geth built from the latest master branch(git clone https://github.com/ethereum/go-ethereum.git) uses new database version different from Geth & Tools 1.8.27(latest stable excutable version ...
0
votes
0answers
27 views
It is an error to execute ERC20 contract token using ganache / go-ethereum
I use go-ethereum.Error: nonce generation function failed or private key is invalid
[Execution environment]
・node:11.6.0-alpine
・ganache-cli@6.3.0
Please tell the person who understands the cause.
...
0
votes
1answer
49 views
What is the difference between create and newAccount in web3js?
There are two ways to create account one is web3.eth.accounts.create() and web3.eth.personal.newAccount(); function, When I use newAccount() function account is created in my local geth client but ...
1
vote
1answer
47 views
How create transaction raw data for using “eth_sendRawTransaction” in C#
My IoT device connects to another computer via Wi-Fi on which Ethereum (Truffle/Ganache) is running which receive a RPC from the IoT.
My task is to create raw transaction data on this IoT Device, so ...
0
votes
0answers
26 views
How to handle password for unlock Account in web3?
In web3 there is function
web3.eth.personal.unlockAccount(address [, callback])
to unlock the account so whenever we call the smart contract function we need to unlock the account in geth client ...
0
votes
1answer
53 views
Gas limit and transaction fee in clique POA chain
I set a private POA private chain using default setting of Puppeth tool.
The gaslimit in genesis.json is:
"gasLimit": "0x47b760"
The decimal number of gasLimit is 4700000
then I start node by ...
0
votes
0answers
20 views
invalid genesis file: invalid character ',' after object key
I am trying to created ethereum private network.
platform - Windows , geth 1.8.27-stable
I created C:\myeth\genesis.json.
genesis.json
{
"config": {
"chainId": 0,
"...
0
votes
1answer
37 views
How to modify geth node configuration after launch
Is it possible to modify geth configuration when the node is running?
For instance, open a port, add more parameter flag to control geth node functions.
I think maybe there are two ways:
One is stop ...
0
votes
0answers
20 views
How to handle floating point number in Solidity? [duplicate]
I read that there is no support for floating point number in solidity, So how we can handle it. If I want to store 12.23 or something like that.
0
votes
0answers
13 views
Testing a Smart Contract on two different devices at the same time
So the goal is to have two computers each owning one account or just different addresses on MetaMask for example and connecting them to the same Smart Contract that is deployed on Rinkeby.
Now how ...
0
votes
0answers
22 views
how much structure variable does solidity support? [duplicate]
Error: "UnimplementedFeatureError: Variable inaccessible, too deep
inside stack"
code:
contract create{
struct s{
string s1;
string s2;
string s3;
string s4;
...
