Ethereum: How to sign a transaction hash in ruby?
signing Ethereum transactions in Ruby: A step -by -step guide
Ethereum is a decentralized popular platform that allows developers to build and implement smart contracts and applications. One of the key components of any Ethereum transaction is “hash transaction “, which contains the input data, including the sender’s private key and the unsigned transaction. In this article, we will explore how to sign an Ethereum transaction using SECP256K1 in Ruby.
understanding SECP256K1
Before we dive in the code, we will briefly discuss the SECP256K1, a cryptographic algorithm used to sign the digital signatures in Ethereum transactions. SECP256K1 is a safe and efficient elliptical cryptography algorithm, which allows developers to sign messages with their own private key. The SECP256K1 'library in Ruby offers an implementation of this algorithm.
Signing a transaction hash
To sign an Ethereum transaction, you must calculate the transaction hash in the entry data (private key and unsigned transaction). Here is a step -by -step guide on how to do it:
1. Calculate the transaction hash
First of all, to create a new "transaction" object with your private key as a sender. We will use theSECP256K1library to calculate the transaction hash.
Ruby
Request "SECP256K1"
Define the private key in hexadecimal format (eg 0x1234567890ABCDEF)
Private_Key = "0x1234567890ABCDEF"
Create a new transaction object with your private key as sender
transaction_hash = transaction.new (private_key)
2. Signs the hash of the transaction
Now that we have the hash of the transaction, let's sign it using SECP256K1.
Ruby
Signing_key = opennsl :: rsa: pkcs8 :: Privatenumber.from_pem ("----- starts private key ----- n ... Your private key here ... \ n ----- End RSRS Private Key ----- ")
Sign the hash of the transaction with your signing key (make sure you replace your "signing key" with your real private key)
signed_transction_hash = transaction_hash.sign (signing_key, 'sha256')
####. Get the transaction hash hash
Finally, we will convert the hash of the transaction signed into a hexadecimal string.
Ruby
Convert the transaction hash signed into a hexadecimal string
signed_transction_hash_hex = signed_transction_hash.to_s (16)
Code testing
Here is the complete code fragment:
Ruby
Request "SECP256K1"
requires "opennsl"
Define the private key in hexadecimal format (eg 0x1234567890ABCDEF)
Private_Key = "0x1234567890ABCDEF"
Create a new transaction object with your private key as sender
transaction_hash = transaction.new (private_key)
Sign the hash of the transaction with your signing key (make sure you replace your "signing key" with your real private key)
Signing_key = opennsl :: rsa: pkcs8 :: Privatenumber.from_pem ("----- starts private key ----- n ... Your private key here ... \ n ----- End RSRS Private Key ----- ")
signed_transction_hash = transaction_hash.sign (signing_key, 'sha256')
Convert the transaction hash signed into a hexadecimal string
signed_transction_hash_hex = signed_transction_hash.to_s (16)
Put "hash the signed transaction: #{simned_transacti_hash_hex}"
This code should issue the transaction hash signed in hexadecimal format. Note that you will need to replace your "private key" with your real private key and install the SECP256K1 library, adding it to gemfile and runningBundle Install`.