'''
Write Python code code that generates bearer token by taking the JSON payload of the HTTPirequest, canonicalizing it according to RFC-8785, and signing it using EIP-191 to obtain an ECDSA signature. Use a sample 12-word Ethereum mnemonic. Example output:eip191:VS50po6K5M6JECBNurxHDtbts3Ugh/QpisEwm0ZSPqQdxXrnT BvBZDZSME3HPeq/1pGP7ISwKJocGeWZESM8am8xs
'''

import json
import hmac
import hashlib
import eip712
from eth_account import Account
from web3.auto import w3

# Sample JSON payload
payload = {'foo': 'bar', 'baz': 1}

# Canonicalize the JSON payload
message = eip712.encode_typed_data(payload, 'Example', '1', {})

# Derive private key from mnemonic
mnemonic = 'example mnemonic here'
acct = Account.from_mnemonic(mnemonic)
private_key = acct.privateKey.hex()

# Sign the message using EIP-191 and the derived private key
eip191_message = b'\x19\x01' + message
signature = w3.eth.account.sign_message(eip191_message, private_key).signature.hex()

# Generate the bearer token
bearer_token = f"eip191:{signature} {acct.address}"
print(bearer_token)