Questions tagged [nethereum]

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

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How to get the liquidity of a pair in pancakeswap or uniswap?

How can I know in pancakeswap or uniswap when a pair is created and how much liquidity is added? At the moment what I have thought is to read the "PairCreated" logs of the Factory contract, ...
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How to convert BigInteger to a decimal in Nethereum / Web3

I need to read and write some Uniswap Transactions using Nethereum/Web3. The uniswap methds expect BigInteger data types, but the UI expects so called Display unit types, which essentially convert ...
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50 views

What unit are the Uniswap/PancakeSwap router functions expecting?

I'm looking at this transaction in BSCScan: https://bscscan.com/tx/0x09a19072b2374340de10dc6ac235fcd0ba229ff1eba41e155f5b0a60f9c2e2cd When looking at Input Data for the method call, the caller ...
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28 views

Decoding Transaction input data in Nethereum

I'm using Nethereum and see this example of how to decode the Input data of a Transaction object. http://playground.nethereum.com/csharp/id/1063 This looks like it assumes that you have to know which ...
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How to interact with Smart Contract via Web3/Nethereum without known ABI

Let's say I'm using Web3 or Nethereum, both of which apparently require the contract's ABI to bind the functions. Is there no way to call smart contract functions without knowing the complete ABI? ...
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44 views

How to call mint function using Nethereum

I am getting the error calling the mint function on a contract. Error: Nethereum.JsonRpc.Client.RpcResponseException: execution reverted I used ERC721PresetMinterPauserAutoId from OpenZeppelin for ...
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49 views

Getting 403 Access Denied after several hours of execution [closed]

I have an application that executes fine for several hours but after a while I start seeing 403 exceptions from the RPC client, usually on internal TranasactionManager calls like "Estimate Gas&...
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27 views

How to perform a SWAP from ETH to WBTC with Netherium?

Sorry for asking nubie question. I have a requirement to transfer eth from my account to ETH & WBTC of another account. Is this possible with netherium ? I have transfered eth from my account to ...
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Why ETH Transfer from Nethereum taking longer time then transfering from metamask wallet?

I am sorry for nubby question. Today i made a ETH transfer of 0.00001 ETH 2 times. One programmatically with Netherium SDK and another directly through metamask wallet to another metamask wallet. Here ...
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erc20 transfer amount exceeds allowance during transaction into nethereum

Getting error "erc20 transfer amount exceeds allowance" during transfer eth in nethereum. any solution please......... MY SOURCE CODE: public async Task<string> TransferAsync(string ...
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During eth transfer in nethreum

Getting error: erc20 transfer amount exceeds allowance. My source code is:: public async Task<string> TransferAsync(string from, string to, decimal amount) { DefaultAccount = new Account(...
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How to make API calls to AWS Managed Blockchain using Nethereum?

I am testing AWS Ethereum (Preview) using Nethereum and I see this method to get a block: var block = await web3.Eth.Blocks.GetBlockNumber.SendRequestAsync(); However, the AWS Ehtereum documentation ...
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Nethereum error: The program has exited with code 0 (0x0)

I followed the steps mentioned in http://docs.nethereum.com/en/latest/Nethereum.Workbooks/docs/nethereum-gettingstarted-smartcontracts-untyped/#deploying-smart-contracts Used the below sample code: ...
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Nethereum.JsonRpc.Client.RpcResponseException: 'data types must start with 0x'

I have this code to get whole transacctions public Task<TransactionModel[]> GetTransactionsAsync(bool sent = false) { return Task.Run(async delegate { var transferEvent = standardTokenService....
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527 views

How to call a smart contract function using Nethereum and Infura

I am using Nethereum to call a smart contract function in Ropsten. I am also using Infura. The function required the contract owner's permission to execute. This is my code: var account = new Account(...
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What argument does contract.GetFunctionSignature expects?

I'm trying to get function by signature from contract using Nethereum.Contracts.Contract.GetFunctionBySignature. This function seems to expect the signature of function, however how can I generate the ...
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60 views

How to get the Error Message from revert and require on a solidity contract with Nethereum

Is there a way on Nethereum to get the string messages returned from arevert or require are executed on solidity contract?
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345 views

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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1answer
95 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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34 views

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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89 views

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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1answer
117 views

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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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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111 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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1k 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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337 views

using account create in metamask with Nethereum

Can I use an account created in metamask using nethereum? I tried this: var abi = @""; var addressContract = ""; var myAddress = "xxxxx"; var password = "password&...
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319 views

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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22 views

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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417 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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2k 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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42 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
203 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
510 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
1k 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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151 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
264 views

Blockchain information from Nethereum

How can I get the latest block, coinbase and other information using Nethereum?
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1answer
245 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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262 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
103 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
765 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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275 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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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
165 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
269 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
21 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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192 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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1k 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
804 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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228 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 ...