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README.md

@@ -32,6 +32,46 @@ To install pybtc, simply use pip
 
 Documentation is available at https://pybtc.readthedocs.io
 
+#### Message signing and verification 
+
+Every message sent to the Blockchain is in hash format, and not in plain string. So we convert the message we are signing into a SHA256 hash before. 
+
+```
+>>> import pybtc
+
+# ADDRESS GENERATION 
+>>> a = pybtc.Address()
+>>> a = pybtc.Address(address_type="P2PKH")
+>>> a.address
+'FTP7LL7QjhgKfqYX1pis18bCqEpZaGSRzZ'
+>>> a.private_key.wif
+'R8Gw2Mr3n2fY1ydB2X5gEehxHkdhboeUD6yw4wRtVKHaqAd9gdkK'
+>>> a.private_key.hex
+'16b6aca5ff6a3bf3a1332dd4edf87880b2883cb4fe16effd073e2e866aa141aa'
+>>> a.public_key.hex
+'033c30b269e2d5df229f3f0ce294b19c4f0a3a8d12280415ce41e7bd3784a619c4'
+
+# CONVERT MESSAGE INTO SHA-256 HASH 
+>>> pybtc.sha256(b'vivek'.hex())
+b'\xa3\xdas\x97e\x01\x81,\xd7\xb8!\xa2\x0b\xfb\t\xaf\nj\x89\x1eA\x9c\xdf\xb7a\xfb\x19\xa9,\x91BB'
+>>> pybtc.sha256(b'vivek'.hex()).hex()
+'a3da73976501812cd7b821a20bfb09af0a6a891e419cdfb761fb19a92c914242'
+>>> msg = b'vivek'.hex()
+>>> msg_hash_hex = sha256(msg).hex()
+>>> msg_hash_bytes = sha256(msg)
+>>> msg
+'766976656b'
+>>> msg_hash_hex
+'a3da73976501812cd7b821a20bfb09af0a6a891e419cdfb761fb19a92c914242'
+>>> msg_hash_bytes
+b'\xa3\xdas\x97e\x01\x81,\xd7\xb8!\xa2\x0b\xfb\t\xaf\nj\x89\x1eA\x9c\xdf\xb7a\xfb\x19\xa9,\x91BB'
+
+# SIGN AND VERIFY THE MESSAGE 
+>>> sig_msg_hex = pybtc.sign_message(msg_hash_hex, a.private_key.wif)
+>>> pybtc.verify_signature(sig_msg_hex, a.public_key.hex, msg_hash_hex)
+True
+```
+
 
 ### How to Contribute