Questions tagged [nethereum]

Questions related to the C# .NET Ethereum Web3 RPC Client Library, named nethereum

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Get ERC20 balance of token holder as of block number with C# Nethereum and Infura

When this code runs, it throws an error "RpcResponseException: header not found", and I don't understand why or how to fix it. Any advice? Notes: I am using Nethereum in C#.net and using ...
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15 views

EcRecover signed message does not match PublicAddress

I am trying to create a C# webservice back end API that handles the code logic found in Step #5 here: https://www.toptal.com/ethereum/one-click-login-flows-a-metamask-tutorial Their code looks like ...
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Transaction is not broadcasting

I'm using Nethereum (.NET MVC project) to register in blockchain, I never had any problems, I always recorded on networks: ETH Mainnet, Ropsten, Rinkeby, Kovan, Mordor and Kotti. However, using the ...
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Is it feasible to write a DApp that targets multiple blockchains

This question does not target Ethereum specifically, but I hope you can help me out! If my questions are too specific, I apologize in advance. I'm trying to utilize Blockchain's immutable + provable ...
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Nethereum C# FilterInput.GetAllChanges always empty

I use Nethereum in my project to get all pending transactions on a specific smartcontract address. To do that based on the existing docs and Nethereum playground I try the following: private async ...
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How to log an event which emits state of the contract in nethereum?

I am logging a specific event from a specific contract using nethereum. However, my event emits contract state (enum in solidity). My log processor shows 0 events instead of 2. Solidity code snippet:...
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Fastest way to convert private to public key in C# .net?

For vanity reasons I am trying to find a private key whose public key has the same 4 characters in both the start and ending position, such as: 0xABCD_____________ABCD . I am finding that my computer ...
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64 views

Getting HTTP/1.1 403 Forbidden when i want to get account balance

Some months ago, I was able to get the balance of my account using this code (I run the code in Unity 2018 and get the code from tutorial in github. I modified some parts of the code). This is the ...
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How to sign automatically generated bindings for smart contracts?

Good day to you. I'm using Nethereum.Generator.Console to automaticly generate bindings for ERC20 token smart contract. I'm trying to call approve method for other contract to charge tokens from me. ...
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How to call contract function in deployed conctract with Infura and nethereum

i'am trying to call smart contract function in test network "Ropsten" https://ropsten.etherscan.io/address/0xa89d48b51801b61b27f9dee744b888ae152c2115 (few failed transaction is just testing with empty ...
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1answer
40 views

Nethereum contract.getPastEvents equivalent

I want to query all transfers regarding a contract with Nethereum. This means, in the end I want to have all transactions, so that I can print a statement of account. I suppose with the web3.js ...
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409 views

Transfer ether from one account to another using smart contract

I`m trying to transfer ether from account A to a smart contract and from the smart contract to account B. I wrote some code that approximately works on Remix IDE, but I completely got lost with the ...
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Nethreum CreateFilterInput Block Number boundary issue

I obtained the latest block number by using: var Latest = web3.Eth.Blocks.GetBlockNumber.SendRequestAsync().Result; Assume Latest = 400000 I create a filter even from block number 390000 to (the ...
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140 views

using account create in metamask with Nethereum

i have a doubt can i use an account created in metamask using nethereum? i tried this. var abi = @""; var addressContract = ""; var myAddress = "xxxxx"; var password = "password"; var managedAccount =...
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Verifying if a user actually owns the address

Web3js frontend with Vue, .NET Core with Nethereum at the back. The key target for this functionality is to sign a message at the frontend, send the signature and the address to the backend to ...
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When use Nethereum C# Library there are many CLOSE_WAITs in TCP Stack at node side

When I use Nethereum methods (GetBlockWithTransactionsByNumber,GetBlockWithTransactionsByNumber and etc ) in loop, In TCP stack at node side accumulates a lots of CLOSE_WAIT. How can I fix this issue ?...
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197 views

i'm creating new account and when i get the balance for that account it returns 0 and cant do any transaction saying dont have enough funds

How to load funds/ether into newly created account. I'm using Ganache and Web3js var web3 = new Web3("HTTP://localhost:7545"); var privateAccount = await web3.Personal....
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999 views

How to pay gas fee for new addresses of ERC20 tokens that initially have 0 Eth balance? [duplicate]

I have a confusion, When we create new address/account for an ERC20 token then it have 0 Eth balance. When we send some tokens to this address and then withdraw token again from this address require a ...
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30 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 ...
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1answer
133 views

NEthereum, Number of indexes don't match the number of topics

I would like to get all Transfer events for a specific interval of blocks. When I call GetAllChanges with the following parameters, I get this error message: 'Number of indexes don't match the ...
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1answer
285 views

Nethereum get Last Block Number

I would like to get something similar to solidity block.number - 1 using Nethereum BlockParameter.CreateLatest() Is latest here mean the Last BlockNumber been mined? Or do I need to minus 1?
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1answer
624 views

How to call a contract function using Nethereum?

I would like to call a contract function using Nethereum C#. Here is the contract in Etherscan (https://etherscan.io/token/0x8c9b261faef3b3c2e64ab5e58e04615f8c788099#readContract) I want to call ...
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128 views

Getting return data from a transaction hash using Nethereum

I'm using Nethereum to call a non-view/non-constant function of a smart contract that modifies the state of the smart contract and returns a boolean value. The result of submitting this transaction ...
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1answer
173 views

Blockchain information from Nethereum

How can I get the latest block, coinbase and other information using Nethereum?
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1answer
188 views

How do I use SoliditySha3 in Nethereum?

According to this, web3 should contain the function soliditySha3. It can take an object (JSON), serialize it, and use the result as input to Keccak256. According to the documentation, the arguments ...
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175 views

Not able to connect to Quorum node from Nethereum

I am not able to connect to Quorumchain using Nethereum. Below is my code and error response. I have verified and the port is open in the machine. I am running on a Linux machine, Ubuntu 18.04. I ...
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1answer
91 views

Getting an error while trying to store large payloads (13-20kB)

I've created a simple smart contract to store large amounts of data (13-20kB) on the Ethereum blockchain. But when I'm trying to make a transaction they fail sometimes (with little correlation to the ...
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1answer
514 views

Create account on Ethereum using Nethereum C#

I have studied the documents for creating a new account using Nethereum.. var ecKey = Nethereum.Signer.EthECKey.GenerateKey(); var privateKey = ecKey.GetPrivateKeyAsBytes().ToHex(); var account = new ...
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223 views

How to access txpool pending transactions using Netherum?

I want to get list of transactions which are in pending state & queued state in txpool. I can see these transactions in pool using txpool.inspect command. I tried code given in nethereum sample ...
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60 views

Transactions are not mining for accounts created by Nethereum.Accounts.Account method but works for accounts created by web3.Personal.NewAccount

Transactions are not mining & in pending state for long time, for transactions with accounts created using Nethereum.Accounts.Account(privateKey). But mining works for accounts created using web3....
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1answer
134 views

create multiple transactions between two accounts using SendTransactionAsync method nethereum

I am trying to create multiple transactions between two accounts using SendTransactionAsync method. But I am getting "replacement transaction underpriced" message. I found some links which says we ...
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2answers
188 views

Encoding Parameters In Nethereum

I'm trying to encode some parameters and I've noticed all the encoders in the ABI project. Essentially, I want the equivalent to abi.encodeParameter(type, value) in Nethereum? Is there an easy ...
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1answer
20 views

unable to connect to TestChain by Code

I am new at Ethereum and intended to connect to a test chain by c#. my code runs greatly on my old laptop win7, but on newer one Win10 it just waits forever. this is my code. has anyone any idea? ...
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138 views

Nethereum - loop of user to slow

I build a smart contract on solidty and website with Nethereum. One of variable include the current status of all the users like this : mapping(address => Status) public StatusUsers; I did a loop(...
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798 views

C# how to compute Keccak256 to match Solidity?

I have a simple Solidity function as below: function testKeccak(uint8[] buffer) public pure returns (bytes32) { return keccak256(abi.encodePacked(buffer)); } Testing the keccak256 hash using ...
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1answer
507 views

Can I get the raw transaction using Nethereum?

How do I get a raw transaction for a transaction on the blockchain using web3/Nethereum? An example of a raw transaction can be seen here: https://etherscan.io/getRawTx?tx=...
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154 views

Indexed Variables On Event Not Being Decoded

I'm currently returning back all events with no filter and all the indexed variables are being returned but they are encoded. The other none indexed variables are visible and being retrieved fine and ...
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321 views

passing byte[] to smart contract using nethereum

I made a solidity function that allow a user to send multiple transactions with the same nonce as a singleton Tx signer: function multipleTransferPreSigned ( bytes[] _signature, address[] ...
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1answer
135 views

Command “geth --rpcapi eth,web3,personal --rpc” throws Fatal Error

After deploying an private Ethereum blockchain with Azure Template "Proof of Work" we are not able to run the following command successfully. "geth --rpcapi eth,web3,personal --rpc" following image ...
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223 views

Nethereum Getting TransactionHash of SendTransaction

I am using Nethereum for Unity3d and I have managed to muddle my way through a lot of issues, but I have a huge problem I just can't seem to solve. I can get this to work with signed transaction ...
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1answer
566 views

How can I decode the inputs to a transaction written by a smart contract constructor with Nethereum?

I've been able to decode the inputs to a contract function transaction given the ABI as follows: var myFunction = contract.GetFunction("MyFunction"); var myFunctionTxn = await contract.Eth....
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1answer
160 views

NewEventDTO is not a valid Event Type

The solidity code pragma solidity ^0.4.24; event NewEvent(uint32 tag, uint32 idx); My Nethereum code public class NewEventDTO { [Parameter("uint32", "tag", 1, false)] public uint Tag { get; ...
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2answers
464 views

Capturing an event fired from a contract that was called from another contract

I'm trying calculate tax on arbitrary items/values. To do this I have a single contract is used as an 'Oracle' to get the tax from an external system. This contract defines functions to be called from ...
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Listing all the smart contracts deployed on ethereum [duplicate]

I want to list all smart contracts deployed on a private Ethereum chain, using Nethereum, and also those which were deployed by a certain address. I have seen here and here but I cannot get anywhere ...
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1answer
182 views

Am I setting my gas price and gas limit correctly?

web3.TransactionManager.DefaultGas = 210000; // Gas limit? web3.TransactionManager.DefaultGasPrice = 10 * 1000000000; // Gas Price? I have intended to set the gas price at 10Gwei.
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How would I connect subscribe to the websocket to get transactions of a certain address with Nethereum(C#)?

I can only find tutorials on how to do it with Web3.JS. With Infura btw (wss://mainnet.infura.io:443/ws)
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Nethereum C# automated ether transfer

I wish to automate the transfer of ether to a list of people. Assume the list is in a csv. I wrote some code to automate the process. class Program { int nonce = 0; static void Main(string[] ...
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1answer
934 views

Nethereum // Infura/RPCclients

I am having a heck of a time getting transactions to post on mainnet. The issue is not my wallet balance or gas related. A balance lookup on the same contract works correctly.. However, i cannot get ...
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1answer
259 views

Is this the only way that I can tell if a transaction is success / failed?

My solidity: function Test(address to, uint amount) public { require(amount == 1000000000000000000); } In Nethereum var r = contract.GetFunction("Test").SendTransactionAsync(<Owner Address&...
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Why I can't get any status from Nethereum TransactionReceipt?

Sample code below (simplified for illustrative purposes only): var a = new ManagedAccount(mOwner, mOwnerPwd); var w = new Web3(a, mNodeUrl); w.TransactionManager.DefaultGas = mGasLimit; w....