Python SDK 与Fisco Bcos交互 -2

（使用 python-sdk ，把区块链作为数据库使用，查询历史数据）

需求：查询通过智能合约存储的历史信息。如

开始存储的是 "xsmile"，通过 Fisco 提供的 call 方法，当前可以查询到 "xsmile"
再次调用合约存储的是 "root", 通过 call 方法查询得到的是 root

那怎么再查询到 "xsmile" 呢？call 方法是不能解决问题的。

官方文档未指明方法，可参考源代码样例：python-sdk/tests/testclient.py

 1 # 获取对应的交易数据，解析出调用方法名和参数
 2 txhash = receipt['transactionHash']
 3 txresponse = client.getTransactionByHash(txhash)
 4 inputresult = abi_parser.parse_transaction_input(txresponse['input'])
 5 print("transaction input parse:", txhash)
 6 print(inputresult)
 7 
 8 # 解析该交易在receipt里输出的output,即交易调用的方法的return值
 9 outputresult = abi_parser.parse_receipt_output(inputresult['name'], receipt['output'])
10 print("receipt output :", outputresult)

Fisco 是通过智能合约 setAttr() 方法写入数据改变区块链的状态。根据交易哈希 transactionHash 获取交易信息，根据交易信息进而解析输入的参数和返回的参数。和以太坊有所区别，不需要有 getAttr() , 或者说 getttr() 方法是无法获取使用的。

合约文件（此文件需要在 python-sdk/ contracts文件夹下）：

 1 pragma solidity ^0.4.25;
 2 
 3     contract BoardTrace {
 4         string productId;
 5         string pClass;
 6         string pSize;
 7         string bClass;
 8         string designStaff;
 9         string designCompanyName;
10         string customerName;
11         string customerAddress;
12         string customerTelePhone;
13         
14         function setAttr(string memory _productId, string memory _pClass, string memory _bClass, string memory _designStaff, string memory _designCompanyName, string memory _customerName) public returns (string memory, string memory, string memory, string memory, string memory, string memory){
15             productId = _productId;
16             pClass = _pClass;
17             bClass = _bClass;
18             designStaff = _designStaff;
19             designCompanyName = _designCompanyName;
20             customerName = _customerName;
21             
22             return (productId, pClass, bClass, designStaff, designCompanyName, customerName);
23         }
24     }
25

sol

代码（此文件需要在 python-sdk 文件夹下）：

  1 import sys
  2 import os
  3 from client.bcosclient import BcosClient
  4 from client_config import client_config
  5 from client.datatype_parser import DatatypeParser
  6 from client.common.compiler import Compiler
  7 from utils.abi import *
  8 import json
  9 import traceback
 10     
 11 class FiscoBcosTest:
 12     
 13     # _contractFilePath = "/home/xsmile/fisco/python-sdk/contracts/"
 14     _contractFilePath = "/home/xsmile/software/boardTrace/easyarron/tracewood/python_sdk/contracts/"
 15 
 16     def __init__(self):
 17         self.client = BcosClient()
 18 
 19     # 编译合约
 20     # .sol 编译会自动生成 .abi, .bin 文件（当前文件下，contracts/ 下面）
 21     def compileContract(self, contractName):
 22 
 23         if os.path.isfile(client_config.solc_path) or os.path.isfile(client_config.solcjs_path):
 24             Compiler.compile_file(self._contractFilePath + contractName + ".sol")
 25 
 26         abi_file = self._contractFilePath + contractName + ".abi"
 27         data_parser = DatatypeParser()
 28         data_parser.load_abi_file(abi_file)
 29         contract_abi = data_parser.contract_abi
 30         
 31         return contract_abi, data_parser
 32 
 33     # 部署合约
 34     def deployContract(self, contractName):
 35         #contract_abi = self.compileContract(contractName)
 36         with open(self._contractFilePath + contractName + ".bin", 'r') as fi:
 37             contract_bin = fi.read()
 38     
 39         contract_result = self.client.deploy(contract_bin)
 40         contract_address = contract_result['contractAddress']
 41         
 42         return contract_address
 43         
 44     # 获取合约数据内容
 45     def getInfo(self, contract_address, contract_abi, func):
 46         res = self.client.call(contract_address, contract_abi, func)
 47         return res
 48     
 49     # 发送交易， 调用改写接口
 50     def setInfo(self, contract_address, contract_abi, func, *args):
 51         receipt = self.client.sendRawTransactionGetReceipt(contract_address, contract_abi, func,  *args)
 52         # txhash = receipt['transactionHash']
 53         # return txhash
 54         return receipt
 55         
 56     
 57     # 根据交易哈希获取交易回执
 58     def getReceipt(self, tx_hash):
 59         res_receipt = self.client.getTransactionReceipt(tx_hash)
 60         return res_receipt
 61         
 62     # 根据交易哈希获取交易信息
 63     def getTransactionInfo(self, tx_hash):
 64         txInfo = self.client.getTransactionByHash(tx_hash)
 65         return txInfo
 66         
 67     def finishClient(self):
 68         self.client.finish()
 69 
 70     def __str__(self):
 71         return self.client.getinfo()
 72 
 73 
 74 
 75 def run():
 76     
 77     fisco = FiscoBcosTest()
 78     print('生成实例： ', fisco)
 79     contract_name = 'BoardTrace'
 80     print('--------------编译合约----------------------------')
 81     contract_abi, abi_parser = fisco.compileContract(contract_name)
 82     
 83     '''
 84     
 85     print('--------------部署合约----------------------------')
 86     contract_address = fisco.deployContract(contract_name)
 87     print('--------->>', type(contract_abi))
 88     print('合约地址： {} \nabi： {}'.format(contract_address, contract_abi))
 89     
 90     return ;
 91     '''
 92     
 93     contract_address = '0xb7a506877cd874b0dc0ed1a43762193b60a7b6d4'
 94     
 95     '''
 96     # 通过合约写入数据
 97     contract_args = ['2020082911', '书桌', '沉香木', '远阪凛', '斗牛家具有限公司', '张阿喵']
 98     receipt = fisco.setInfo(contract_address, contract_abi, 'setAttr', contract_args)
 99     print('--------------交易内容----------------------------')
100     print('receipt: ', receipt)
101     print('transacitonHash:', receipt['transactionHash'])
102     '''
103     
104     
105     
106     # input ['2020082910', '橱柜', '沉香木', '远阪凛', '斗牛家具有限公司', '张阿喵']
107     transaction_hash = '0x13e1bcaeff87a41090f486fad4c5ab1ddc5c87d852984520303169a60e33149e'
108     
109     # input ['2020082911', '书桌', '沉香木', '远阪凛', '斗牛家具有限公司', '张阿喵']
110     # transaction_hash = '0xc5160839282dd05fda120b8b1a67a47890ef6b493de6a79a9b6bc18c80248733'
111     
112     
113     # 根据交易 hash 获取交易回执
114     res_receipt = fisco.getReceipt(transaction_hash)
115     print('res_receipt: {}'.format(json.dumps(res_receipt, indent=4)))
116     
117     
118     # 根据交易 hash 获取交易信息
119     txInfo = fisco.getTransactionInfo(transaction_hash)
120     print('txInfo: {}'.format(json.dumps(txInfo, indent=4)))
121     
122     # 获取对应的交易数据，解析出调用方法名和参数
123     # print('--------------获取对应的交易输入数据----------------------------')
124     inputresult = abi_parser.parse_transaction_input(txInfo['input'])
125     # print(inputresult)
126 
127     # 解析该交易在receipt里输出的output,即交易调用的方法的return值
128     print('--------------获取对应的交易输出数据----------------------------')
129     outputresult = abi_parser.parse_receipt_output(inputresult['name'], res_receipt['output'])
130     print("receipt output :", type(outputresult), outputresult)
131     
132     '''
133     # 获取合约数据
134     res = fisco.getInfo(contract_address, contract_abi, 'getAttr')
135     print('--------------获取合约数据存储信息----------------------------')
136     print('res: ', res)
137     '''
138     
139     fisco.finishClient()
140     
141 if __name__ == '__main__':
142     run()

Code

运行结果：

 1 xsmile@xsmile:~/software/boardTrace/easyarron/tracewood/python_sdk$ python3 fiscoTest.py 
 2 生成实例：  channel 127.0.0.1:20200,groupid :1
 3 --------------编译合约----------------------------
 4 INFO >> compile with solc compiler :  ./bin/solc/v0.4.25/solc --bin --abi /home/xsmile/software/boardTrace/easyarron/tracewood/python_sdk/contracts/BoardTrace.sol -o contracts --overwrite
 5 res_receipt: {
 6     "blockHash": "0x12517a791649ddaa7308a95fa47c15b7f2616192ed313179034804b402d6775d",
 7     "blockNumber": "0x23",
 8     "contractAddress": "0x0000000000000000000000000000000000000000",
 9     "from": "0x95198b93705e394a916579e048c8a32ddfb900f7",
10     "gasUsed": "0x18c2a",
11     "input": "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",
12     "logs": [],
13     "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
14     "output": "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",
15     "root": "0xec7a40e8c0b4117e2ab1994b20f6f5c209990d429fa79cf5f5cdabc250a48651",
16     "status": "0x0",
17     "to": "0xb7a506877cd874b0dc0ed1a43762193b60a7b6d4",
18     "transactionHash": "0xc5160839282dd05fda120b8b1a67a47890ef6b493de6a79a9b6bc18c80248733",
19     "transactionIndex": "0x0"
20 }
21 txInfo: {
22     "blockHash": "0x12517a791649ddaa7308a95fa47c15b7f2616192ed313179034804b402d6775d",
23     "blockNumber": "0x23",
24     "from": "0x95198b93705e394a916579e048c8a32ddfb900f7",
25     "gas": "0x1c9c380",
26     "gasPrice": "0x1c9c380",
27     "hash": "0xc5160839282dd05fda120b8b1a67a47890ef6b493de6a79a9b6bc18c80248733",
28     "input": "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",
29     "nonce": "0x1a79cba2",
30     "to": "0xb7a506877cd874b0dc0ed1a43762193b60a7b6d4",
31     "transactionIndex": "0x0",
32     "value": "0x0"
33 }
34 --------------获取对应的交易输出数据----------------------------
35 receipt output : <class 'tuple'> ('2020082911', '书桌', '沉香木', '远阪凛', '斗牛家具有限公司', '张阿喵')
36 xsmile@xsmile:~/software/boardTrace/easyarron/tracewood/python_sdk$ python3 fiscoTest.py 
37 生成实例：  channel 127.0.0.1:20200,groupid :1
38 --------------编译合约----------------------------
39 INFO >> compile with solc compiler :  ./bin/solc/v0.4.25/solc --bin --abi /home/xsmile/software/boardTrace/easyarron/tracewood/python_sdk/contracts/BoardTrace.sol -o contracts --overwrite
40 res_receipt: {
41     "blockHash": "0x02d0e02c03513bfebfe9205bb954bd7f0adcd188bbad320b71c77ea4d7b4ebf7",
42     "blockNumber": "0x22",
43     "contractAddress": "0x0000000000000000000000000000000000000000",
44     "from": "0x95198b93705e394a916579e048c8a32ddfb900f7",
45     "gasUsed": "0x27534",
46     "input": "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",
47     "logs": [],
48     "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
49     "output": "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",
50     "root": "0x9ba5787752ab25d50b2dcf6e16d333af9f8904458d4439a2c77dc97ddd6f978f",
51     "status": "0x0",
52     "to": "0xb7a506877cd874b0dc0ed1a43762193b60a7b6d4",
53     "transactionHash": "0x13e1bcaeff87a41090f486fad4c5ab1ddc5c87d852984520303169a60e33149e",
54     "transactionIndex": "0x0"
55 }
56 txInfo: {
57     "blockHash": "0x02d0e02c03513bfebfe9205bb954bd7f0adcd188bbad320b71c77ea4d7b4ebf7",
58     "blockNumber": "0x22",
59     "from": "0x95198b93705e394a916579e048c8a32ddfb900f7",
60     "gas": "0x1c9c380",
61     "gasPrice": "0x1c9c380",
62     "hash": "0x13e1bcaeff87a41090f486fad4c5ab1ddc5c87d852984520303169a60e33149e",
63     "input": "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",
64     "nonce": "0x101f2919",
65     "to": "0xb7a506877cd874b0dc0ed1a43762193b60a7b6d4",
66     "transactionIndex": "0x0",
67     "value": "0x0"
68 }
69 --------------获取对应的交易输出数据----------------------------
70 receipt output : <class 'tuple'> ('2020082910', '橱柜', '沉香木', '远阪凛', '斗牛家具有限公司', '张阿喵')

result

posted @ 2020-08-29 11:12 x_smile 阅读(753) 评论(0) 编辑收藏举报

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Python SDK 与Fisco Bcos交互 -2

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