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蚂蚁区块链BaaS登录、存证、取证示例代码
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| #!/usr/bin/env python | |
| import base64 | |
| import codecs | |
| import json | |
| import logging | |
| import os | |
| import sys | |
| import uuid | |
| from datetime import datetime | |
| import requests | |
| from Cryptodome.Cipher import AES | |
| from Cryptodome.Cipher import PKCS1_OAEP | |
| from Cryptodome.Hash import SHA256 | |
| from Cryptodome.PublicKey import RSA | |
| from Cryptodome.Signature import PKCS1_v1_5 | |
| class RequestException(Exception): | |
| pass | |
| class AntChainBaaSApi(): | |
| def __init__( | |
| self, | |
| *, | |
| access_id: str, | |
| chain_id: str, | |
| account_name: str, | |
| kms_id: str, | |
| tenant_id: str, | |
| base_url: str = 'https://rest.baas.alipay.com', | |
| access_key: str = None, | |
| access_key_path: str = None, | |
| ): | |
| if not access_key: | |
| if not access_key_path: | |
| raise ValueError('either access_key or access_key_path has to be provided') | |
| with open(access_key_path, 'rt') as file: | |
| access_key = file.read() | |
| self.access_key = access_key | |
| self.access_id = access_id | |
| self.account_name = account_name | |
| self.kms_id = kms_id | |
| self.tenant_id = tenant_id | |
| self.chain_id = chain_id | |
| self.base_url = base_url | |
| self._curr_token = None | |
| def sign(self, content): | |
| private_key = RSA.import_key(self.access_key) | |
| signer = PKCS1_v1_5.new(private_key) | |
| signature = signer.sign(SHA256.new(content.encode("utf-8"))) | |
| return signature.hex() | |
| @staticmethod | |
| def _handle_response(resp): | |
| if resp.status_code != 200: | |
| raise RequestException(f'API request fails. url={resp.url}, ' | |
| f'status_code={resp.status_code}, body={resp.text}') | |
| ret = resp.json() | |
| if not ret['success']: | |
| raise RequestException(f'API returns unsuccessful result. url={resp.url}, ' | |
| f'status_code={resp.status_code}, body={resp.text}') | |
| return ret['data'] | |
| def get_token(self): | |
| # reference: https://antchain.antgroup.com/docs/11/146925 | |
| ts = int(datetime.now().timestamp() * 1000) | |
| secret = self.sign(f'{self.access_id}{ts}') | |
| full_url = f'{self.base_url}/api/contract/shakeHand' | |
| resp = requests.request('post', full_url, json={ | |
| 'accessId': self.access_id, | |
| 'time': ts, | |
| 'secret': secret, | |
| }) | |
| return self._handle_response(resp) | |
| @property | |
| def curr_token(self): | |
| if self._curr_token is None: | |
| self._curr_token = self.get_token() | |
| return self._curr_token | |
| def request(self, method, url, json): | |
| full_url = f'{self.base_url}/api/{url}' | |
| json = json or {} | |
| json['accessId'] = self.access_id | |
| json['token'] = self.curr_token | |
| resp = requests.request(method, full_url, json=json) | |
| return self._handle_response(resp) | |
| def query_transaction(self, hash: str, decode_data: bool = True): | |
| ret = self.request('post', 'contract/chainCall', json={ | |
| 'method': 'QUERYTRANSACTION', | |
| 'bizid': self.chain_id, | |
| 'hash': hash, | |
| 'account': self.account_name, | |
| 'mykmsKeyId': self.kms_id, | |
| 'tenantid': self.tenant_id, | |
| }) | |
| data = json.loads(ret) | |
| if decode_data: | |
| data['transactionDO']['data'] = base64.b64decode(data['transactionDO']['data']).decode() | |
| return data | |
| def deposit(self, content, order_id): | |
| """Return the hash""" | |
| return self.request('post', 'contract/chainCallForBiz', json={ | |
| 'orderId': order_id, | |
| 'content': content, | |
| 'method': 'DEPOSIT', | |
| 'bizid': self.chain_id, | |
| 'account': self.account_name, | |
| 'mykmsKeyId': self.kms_id, | |
| 'tenantid': self.tenant_id, | |
| }) | |
| if __name__ == '__main__': | |
| kwargs = { | |
| 'base_url': 'https://rest.baas.alipay.com', | |
| 'chain_id': '<please_input_the_chain_id>', | |
| 'account_name': '<please_input_the_account_name>', | |
| 'kms_id': '<please_input_the_kms_id>‘, | |
| 'access_id': '<please_input_the_access_id>', | |
| 'access_key_path': '<please_input_the_access_key_path>', | |
| 'tenant_id': '<please_input_the_tenant_id>', | |
| } | |
| api = AntChainBaaSApi(**kwargs) | |
| data = 'Hello data!' | |
| hash = api.deposit(data, order_id=str(uuid.uuid4())) | |
| print(f'{hash=}') | |
| trans = api.query_transaction(hash) | |
| print(f'{trans=}') | |
| assert trans['transactionDO']['data'] == data |
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