require(msg.value == prices[0],"wrong ether amount");
require(nodes[msg.sender].level == 0, "already connected");@MyOnAsSalat Below is a link to a gist. It contains sample code I used to test a modified version of the contract. I used the nethereum test chain.
1 - I altered the Solidity code to prevent transferring eth, which I didn't want to do whilst testing.
2 - I compiled the Solidity code to create the abi and byte code (using the Solidity VS Code extension).
3 - I code generated the C# API from the abi and byte code (see Abi Code Gen on the playground or http://docs.nethereum.com/en/latest/nethereum-code-generation/)
4 - Created a simple C# program to demonstrate how to invoke and query the contract.
https://gist.github.com/Dave-Whiffin/45c648f2b6b393479a8a6ba0e1553d0e
I hope it helps
Otherwise, i'm trying to do it on my own following this post: https://ethereum.stackexchange.com/questions/67055/block-header-hash-verification
The thing here is that RLP doesn't return the right output in C#
Here's the code
var block = await _web3.Eth.Blocks.GetBlockWithTransactionsHashesByNumber.SendRequestAsync(400000);
var blockInfo = _FormatBlockInfo(block);
var blockHeader = blockInfo
.GetType()
.GetProperties()
.Select(p => {
object value = p.GetValue(blockInfo, null);
Console.WriteLine(value);
return value == null ? null : value.ToString().HexToByteArray();
})
.ToArray();
var rlp = "0x" + RLP.EncodeList(blockHeader).ToHex();
// wrong output
We use the Istanbul consensus so the way the block hash is calculated varies from Ethereum's ethash
ethereum/EIPs#650
Any suggestion ?
"Block hash calculation
While calculating block hash, we need to exclude committed seals since that data is dynamic between different validators. Therefore, we make CommittedSeal an empty array while calculating the hash. The calculation is:
Header: Same as ethash header only with a different extraData.
extraData: vanity | RLP(IstanbulExtra), where in the IstanbulExtra, CommittedSeal is an empty array."