Ethereum: How to sign a transaction hash in ruby?
Signing Ethereum transactions in Ruby: Step by step guide
Ethereum is a popular decentralized platform that allows programmers to build and implement intelligent contracts and applications. One of the key elements of any Ethereum transaction is “transactionshash, which contains an abbreviation of the input data, including the sender's private key and an unsigned transaction. In this article, we will examine how to sign the Ethereum transaction using SECP256K1 in Ruby.
Understanding SECP256K1
Before immersing in the code, let's briefly discuss the SECP256K1, the cryptographic algorithm used to sign digital signatures in Ethereum transactions. SECP256K1 is a safe and efficient algorithm of the elliptical curve cryptography that allows programmers to sign messages using their own private key. The "SECP256K1" library in Ruby ensures the implementation of this algorithm.
signing of the transaction hash
To sign the Ethereum transaction, you need to calculate the abbreviation of the transaction based on the input data (private key and non -signal transaction). Here is a step -by -step guide, how to do it:
1. Calculate the transaction shortcut
First, let's create a new "transaction" object with a private key as a sender. We will use the "SECP256K1" library to calculate the transaction shortcut.
Ruby
require "secp256k1"
Define your private key in sixteen format (e.g. 0x1234567890ABCdef)
private_key = "0x1234567890abdef"
Create a new transaction object with a private key as a sender
transaction_hash = transaction.new (private_key)
2. Sign through transactions
Now that we have a shortcut of the transaction, let’s sign it with the SECP256K1.
`Ruby
SIRIDING_KEY = OPENSSL :: RSA :: PKCS8 :: privatenumber.from_pem ("----------------- \ N ... N ... N ... N ... N ... N ... N ... N ... N ... N ... N ... N ... N ....------------- RSA private key ------ ")
Sign the transaction abbreviation using the signing key (remember to replace the "key signing" with your actual private key)
signed_transaction_hash = transaction_hash.sign (signing_key, "sha256")
3. Get the signed hash of transactions
Finally, we will convert the signed hash of transactions to hexadecimal.
`Ruby
Transform signed hash of transactions into hexadecimal
signed_transaction_hash_hex = signed_transaction_hash.to_s (16)
Code testing
Here is a full fragment of the code:
`Ruby
require "secp256k1"
They require "OpenSSL"
Define your private key in sixteen format (e.g. 0x1234567890ABCdef)
private_key = "0x1234567890abdef"
Create a new transaction object with a private key as a sender
transaction_hash = transaction.new (private_key)
Sign the transaction abbreviation using the signing key (remember to replace the "key signing key" with your private key)
SIRIDING_KEY = OPENSSL :: RSA :: PKCS8 :: privatenumber.from_pem ("----------------- \ N ... N ... N ... N ... N ... N ... N ... N ... N ... N ... N ... N ... N ....------------- RSA private key ------ ")
signed_transaction_hash = transaction_hash.sign (signing_key, "sha256")
Transform signed hash of transactions into hexadecimal
signed_transaction_hash_hex = signed_transaction_hash.to_s (16)
Places "signed hash transaction: #{signed_transaction_hash_hex}"
This code should display the signed abbreviation of transactions in hexadecimal format. Remember that you need to replace your “private key” for the actual private key and install the SECP256K1 library, adding it to Gemfile and starting “installing the package”.