All Questions
235 questions
0
votes
1
answer
255
views
Simple Go-Ethereum Program not compiling
I am following this tutorial: 01-Interact with Ethereum blockchain using Golang
When I compile the code, i get the following errors:
# github.com/deckarep/golang-set
../github.com/deckarep/golang-set/...
- 1
3
votes
2
answers
1k
views
Verified go signature in solidity (EIP712 TypedData)
I am trying to recover the signer of a TypedData message (eip712).
I am able to sign and verify with ethersJS and validate in the contract as well.
With Go, I can sign and verify as well but the ...
- 1,615
0
votes
1
answer
294
views
How to extend functionality of geth (module, addon)?
Is there a way to extend functionality of geth using some sort of plugins, modules or addons?
However, I haven't found any information about the topic.
How to do it?
- 11
0
votes
1
answer
103
views
How to obtain full token address from uniswap/PCS router transactions (*types.Transaction)
When trying to obtain the token address from router transactions (add liquidity and remove liquidity taxes), the token addresses appear truncated, with 8 leading 0s and the 8 final characters missing. ...
- 1
0
votes
1
answer
360
views
Can I deploy contract with go-ethereum and sign it via MetaMask?
I want to deploy contracts by using my go backend code with go-ethereum package. Since this part of the system will run as a central element (since it does a lot of other stuffs), I won't (and don't ...
- 1
0
votes
1
answer
197
views
How to set total supply of native token in genesis file?
I understand you prefund wallet address with a native token in the alloc param, but where do you define the total supply at in the genesis.json file?
"genesis": {
"nonce":...
- 141
0
votes
1
answer
972
views
How to interact with mainnet smart contracts by GOlang?
Please tell me an example of code in GOlang that connects to the contract and checks the balance of the ERC20 token / transfer tokens / gets the name of the token. I looked for examples and did not ...
- 1
1
vote
1
answer
732
views
Verify Nonce Signature in the backend Golang
I am trying to implement a metamask user authentication flow on BSC.
I managed to get it working on ethereum. The flow is like this.
I've found the code for ethereum on some gist however I am unable ...
- 111
1
vote
1
answer
1k
views
Calling multicall contract using Go
I'm trying to make a multicall using go. The function "aggregate" takes a tuple of "calls" with address and bytes.
"name": "aggregate",
"...
- 11
1
vote
1
answer
1k
views
How do I listen for Events starting at a previous block number in Golang?
I'm writing an Event listener for my smart contract using the go-ethereum library. I'm trying to figure out how to listen for all SubmitProof events and have successfully been able to use the builtin ...
- 85
2
votes
2
answers
2k
views
Await transaction using `go-ethereum/ethclient`
In ethers.js, one can wait for a transaction to be mined with wait(). Is there a way to do this when using ethclient from go-ethereum as a package? I would like to wait for the result before moving on ...
- 33
0
votes
1
answer
152
views
Using Ethereum as a Unique ID Generator
I have a requirement where I would like to call a smart contract and store some values against a unique ID.
I have seen the Counters library from OpenZeppelin.
Is a smart contract a good use case for ...
- 103
0
votes
0
answers
30
views
Go Ethereum "invalid signature recovery id" when recovery byte is >= 4 [duplicate]
I have a signed message that was generated by Metamask. It looks like this: ...
- 85
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
0
votes
0
answers
379
views
Decode pending transaction input into map
I'm attempting to decode a transaction input into a map, the input contains uint256 which are translated to bigint but the output value I get is incorrect.
I use this function to decode the input data ...
- 1
1
vote
1
answer
921
views
Go Ethereum encode types.Transaction as hex
I have a types.Transaction object.
How can I encode this to receive the raw transaction hex?
Something like this:
...
- 131
0
votes
1
answer
1k
views
Decode Raw Transaction In GoLang to Go-Ethereum types.Transaction
I have the following raw transaction string.
...
- 131
1
vote
0
answers
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
1
answer
2k
views
Why is my contract so expensive to deploy?
I've tried to deploy a contract based on openzeppelin library (see below). The fee I paid is about $146 and the contract didn't even deploy(i.e it run out of gas ). I find this unbelievable high. It ...
- 13
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
vote
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
0
votes
0
answers
784
views
Call getReserves() from goweb3
I've been using https://github.com/umbracle/go-web3 as my go web3 library, and I am having trouble finding out how to call the "function getReserves(address factory, address tokenA, address ...
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
0
votes
1
answer
81
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
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
1
vote
0
answers
1k
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
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
0
votes
1
answer
3k
views
How to solve the "cannot find package" error in GoLand?
I just imported the go-ethereum project in GoLand. But the configuration shows the error below, how to solve it?
- 1,003
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
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
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
0
votes
1
answer
171
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 ...
- 140
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