Ethereum Library in Python
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Introduction
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In
Library Code
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We will use the “cryptography” library, which is a popular and well -maintained library for cryptographic tasks in python. We will also use the HMAC Library to Generate Mac (Authentication of Message Codes) for Ethereum Blockchain.
facility
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To install the required Libraries, Run the Following Commands:
`bash
Pip Install Cryptography
'
Library Code:
Python
Import an operating system
Of cryptography.hazmat. Primitive Import of Serialization
cryptography.hazmat.primitifs.asymetric Import EC
from cryptography.hazmat.backends Import default_backend
Import the Base64
Ethereumlibrary Class:
Def __init __ (self, private_key = none):
If Private_Key:
self.private_key = private_key
Other:
Generate a New Ec Keys for Each Instance of the Library
self.private_key = Ec.Generate_Private_Key (EC.SecP256K1 (), default_backend ())
DEF GENERATE_EC_KEYPAIR (SELF, PRIVE_KEY = None):
If Private_Key is None:
private_key = self.private_key
Return Ec.Generate_Private_Key (Private_Key, Default_backend ())
Def get_private_key (self):
Return Self.Private_Key
Def get_public_key (self):
Return self.private_key.public_key ()
def sign_message (self, message, public_key):
signature = public_key.sign (
Message,
E.dhparams (),
Signingalgorithm.Sha256 Asymmetrical ()
)))
Return Base64.B32encode (Signature)
Def Verify_signature (Self, Message, Signature, Private_Key):
to try:
public_key = self.private_key.public_key ()
Public_key.verify (
Signature,
Message,
Asymmetrical Verveykey.dhparam (),
)))
Real Return
Except:
go back
Example of Use:
Library = Ethereumlibrary ()
Generate a New Ec Keys for Each Instance of the Library
Keypair = Biblirary.Generate_ec_KeyPair ()
private_key = library.get_private_key (). Public_bytes (
Coding = serialization.ecoding.pem,
Format = serialization.privormat-trust-inless,
Encryption_Algorithm = Serialization.noencryption ()
)))
Sign a message with the public key
Message = B "Hello, World!"
signature = library.sign_message (message, keypair.public_key ())
print (library.get_private_key (). Public_bytes (
Coding = serialization.ecoding.pem,
Format = serialization.publicformat.subjectpubliceweyinfo
)))
Check the Signature Using the Private Key
Private_key.verify (
B "\ x00 \ x01 \ x02 \ x03",
signature
B "Hello, World!", Message #
Keypair.private_key
)))
'
Note that Significant memory.
Committed Messages
----------------
For Validation Messages, follow the Standard Professional Guidelines:
- Use Imperative Mood (for example, "Feat: Add the Ethereum Library")
- Keep the First Short Line (<72 Characters)
- Use the Present (for example, "Add a New Generation of EC Keys"))
Example of Validation Message:
'
Adding the Basic Ethereum Library to Python
` ‘