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Questions tagged [nethereum]

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

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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
51 views

Blockchain information from Nethereum

How can I get the latest block, coinbase and other information using Nethereum?
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Duplicated BigInteger

I frequently find the following error when using NEthereum: The type 'BigInteger' exists in both 'Nethereum.Hex, Version=3.0.0.0, Culture=neutral, PublicKeyToken=null' and 'netstandard, Version=2.0....
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1answer
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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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1answer
25 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
54 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
78 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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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
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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
35 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
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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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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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2answers
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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
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Can I get the raw transaction using Nethereum?

How do I get a raw transaction using web3/Nethereum? An example of a raw transaction can be seen here: https://etherscan.io/getRawTx?tx=...
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2answers
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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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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
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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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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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Nethereum transaction

How can I send the msg.data together with my transaction? Nethereum.StandardTokenEIP20.StandardTokenService(Web3, Add).TransferAsync(...)
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1answer
169 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
81 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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How do I monitor event on Main Ethereum Account using Nethereum

What I mean is the real ETH transferred to my account, not Token. Let says I have an account (address 0x1234567890) Someone send me 1 ETH. I wish I can monitor and see that transaction, without ...
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2answers
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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
45 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
441 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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172 views

Passing signature parameter to ERC865 contract and ecrecover()

I'm trying to deploy ERC865 Token while using C# Nethereum. The ERC865 contract expect to get signature length of 65 and when i tray to use "geth attach" web3.sha3(privatekey) i get 68 characters long ...
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111 views

How to get pending transactions

I try using txpool_content and txpool_inspect so,Is there anyway to get pending transactions using geth via .net and Json?
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1answer
72 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....
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1answer
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Deploy contract with truffle, how to call in Nethereum?

I am currently deploying my ChangeManager contract in truffle and I want to call the contract later in Nethereum. For this I need the contract address in Nethereum. I figured I could just create an ...
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How can I import the Accounts from ganache-cli into Nethereum?

Is there a way to automatically load the Accounts created by ganache-li into a project which uses Nethereum?
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1answer
296 views

Error occurred when trying to send rpc requests(s)

I am using the nethereum package in .Net and trying to invoke a smart contract with web3. Initially it was working fine, but suddenly I am getting an error while trying to get the transaction count. ...
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43 views

SmartContract determine timestamp of saving data

I have really simple solidity smartcontract for saving and fetching data structs. When I ask for data struct (fetching function) I need to know timestamp (or block ID) when was the struct saved. How ...
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create ethereum wallet using c#

I already learn how to create encrypted private key using Nethereum and I find how to create account. var ecKey = Nethereum.Signer.EthECKey.GenerateKey(); var privateKey = ecKey.GetPrivateKeyAsBytes()...
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Nethereum SendTransactio and Getting a Mapping value always 0

I have the following contract: pragma solidity ^0.4.23; contract NatCoin { struct UserBalance { uint natcoins; string email; string login; } mapping (uint => ...
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Making RPC calls without setting up my own node [duplicate]

My application is using web3 or Nethereum to connect to my own ethereum node (setup using geth). Is it a must for me to setup my own node to make RPC calls (or connect to a specific node that setup ...
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131 views

Using string as an indexed variable in an Event

I have written a contract that has an event like this: event Creation(string indexed _id,string _transType, string _ownerFirstName,string _ownerLastName); I am trying to listen to the Event through ...
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161 views

Send ether to contract account by nethereum

I want to send ether to contract account address my code is : Account ac = new Account("4df253b63a39512893df2bbd48d31ff160a304ced892eb2c66a32e9d352081fa"); var web3 = new Nethereum.Web3.Web3(ac, "...
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1answer
135 views

Account vs ManagedAccount in Nethereum

Account to this text, they are different: https://nethereum.readthedocs.io/en/latest/accounts/ But it never mentioned what are the differences. Anyone know which one to choose from when implementing ...
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392 views

Nethereum Call to function seems to return correctly but state of contract is uneffected [duplicate]

I am attempting to set a variable of the contract. The setter function returns the expected value but the value of subsequent calls to get are unaffected. Nethereum Code: using System; using System....
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1answer
266 views

Nethereum contract function call throwing exception on return: hex string has length 64, want 40 for common.Address

Both a call returning and address and a call returning an int256 fail with the same error: Nethereum.JsonRpc.Client.RpcResponseException HResult=0x80131500 Message=invalid argument 0: hex string ...
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1answer
164 views

Can I assume when an event is received means the transaction is 100% confirmed?

I am listening to the even using Nethereum. May I know if an event is received means the transaction is confirmed? If not? How can I know it is failed and perform a rollback?
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Converting Solidity enum to Nethereum enum [duplicate]

Below is a snippet of code that I have extracted for illustrative purpose only. I have an enum declared in Solidity and returns in a function. enum State { start, end } function Test() public view ...
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Force caller to pay for gas without knowing their Password

Currently I wish the caller who invoke my contract (via nethereum) to pay for the gas. var a = new ManagedAccount("<add. of the user>", "<password>"); var w = new Web3(a, "http://............
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Life Span of Nethereum object

I am providing a wrapper for all my contract functions inside a C# class using Nethereum. And I found that in almost all the functions, I will start with: var a = new ManagedAccount("<address>",...
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3answers
757 views

Problem unlockaccount on Rinkeby via infura

I got "405 Method Not Allowed" error when I tried to unlock an account I created on MetaMask. Here is the code: string privateKey = "...