make_imx_mint_sig.py

# pip3 install pysha3 eth-account requests

from eth_account.messages import encode_defunct
from eth_account import Account
import sha3
import json
import os
import requests as req

acc = Account.from_key("4c4b2554e43b374f4cafdd5adaeea5e9aff9b3be54d329bc939752bb747294b9")

payload = {
    "contract_address": "0xb72d1aa092cf5b3b50dabb55bdab0f33dfab37b7",
    "royalties": [
        {"recipient": "0xea047d1919b732a4b9b12337a60876536f4f2659", "percentage": 4}
    ],
    "users": [
        {
            "user": "0xea047d1919b732a4b9b12337a60876536f4f2659",
            "tokens": [
                {
                    "id": "2",
                    "blueprint": "x",
                    "royalties": [
                        {
                            "recipient": "0xea047d1919b732a4b9b12337a60876536f4f2659",
                            "percentage": 3.5,
                        }
                    ],
                }
            ],
        }
    ],
    "auth_signature": "",
}

str_payload = json.dumps(payload, separators=(",", ":"))

hash_gen = sha3.keccak_256()
hash_gen.update(str.encode(str_payload))

message = "0x" + hash_gen.hexdigest()

signature = acc.sign_message(encode_defunct(text=message))

str_siggy = signature.signature.hex()


def parseEnd(siggy):
    siggy_end = siggy[len(siggy) - 2 :]
    num = int(siggy_end, 16)
    if num == 27:
        return str(num).rjust(2, "0")
    else:
        return str(num - 27).rjust(2, "0")


auth_signature = str_siggy[:-2] + parseEnd(str_siggy)

payload["auth_signature"] = auth_signature

res = req.post(
    "https://api.ropsten.x.immutable.com/v2/mints", json=[payload]
)
print(res.text)