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通过命令行在Python中测试以太坊RPC客户端,py开发

文章作者:编程应用 上传时间:2019-11-06

python利用web3.py开辟以太坊应用dapp的实战教程:

在此个笔记中,小编将利用Python命令行测量检验以太坊的RPC客商端,思索好狂敲键盘吧。进度中关于JSON RPC的越来越多消息,能够参见JSON RPC。

python以太坊

输入:

本课程详细批注怎样使用Python开辟以太坊应用,课程内容即涉及以太坊中的宗旨概念,比如账户管理、状态与贸易、智能合约开拓与互相、过滤器和事件等,同有时间也详细表明什么选用Python与以太坊举办相互作用,是Python程序猿学习以太坊应用开垦的不二采撷。

from IPython.core.interactiveshell import InteractiveShellInteractiveShell.ast_node_interactivity = "all"

import syssys.version

输出:

'3.6.0 |Anaconda 4.3.0 | (default, Dec 23 2016, 12:22:00) n[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)]'

兵马未动粮草先行粮草先行条件

为以太坊设置Python RPC顾客端,输入:

jitsejan@jjvps:~$ pip install ethereum-rpc-client

输入:

jitsejan@jjvps:~$ geth --networkid 23 --nodiscover --maxpeers 0 --port 30333 --rpc

输入:

!geth account list

输出:

Account #0: {8cf9deda0712f2291fb16739f8759e4a0a575854} keystore:///home/jitsejan/.ethereum/keystore/UTC--2017-05-01T14-58-43.532247863Z--8cf9deda0712f2291fb16739f8759e4a0a575854

输入:

from eth_rpc_client import Clientclient = Client(host="127.0.0.1", port="8545")

输入:

import pdirpdir

输出:

abstract class: __subclasshook__attribute access: __delattr__, __dir__, __getattribute__, __setattr__class customization: __init_subclass__object customization: __format__, __hash__, __init__, __new__, __repr__, __sizeof__, __str__other: _coinbase_cache, _coinbase_cache_til, _nonce, async_timeout, host, is_async, port, request_queue, request_thread, results, sessionpickle: __reduce__, __reduce_ex__rich comparison: __eq__, __ge__, __gt__, __le__, __lt__, __ne__special attribute: __class__, __dict__, __doc__, __module__, __weakref__descriptor: default_from_address: @property with getter, Cache the coinbase address so that we don't make two requests for everyfunction: _make_request: call: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_call construct_json_request: get_accounts: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_accounts get_balance: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getbalance get_block_by_hash: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getblockbyhash get_block_by_number: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getblockbynumber get_block_number: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_blocknumber<F37> get_code: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getcode get_coinbase: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_coinbase get_filter_changes: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getfilterchanges get_filter_logs: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getfilterlogs get_gas_price: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_gasprice get_logs: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getlogs get_max_gas: get_nonce: get_transaction_by_hash: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_gettransactionbyhash get_transaction_receipt: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_gettransactionreceipt make_request: new_block_filter: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_newblockfilter new_filter: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_newfilter new_pending_transaction_filter: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_newpendingtransactionfilter process_requests: Loop that runs in a thread to process requests synchronously. send_transaction: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sendtransaction uninstall_filter: https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_uninstallfilter wait_for_block: wait_for_transaction: 

输入:

address = client.get_coinbase()address

输出:

0x8cf9deda0712f2291fb16739f8759e4a0a575854

输入:

client.get_balance

输出:

135000419895999999940

输入:

address_vps_one = "0xc257beaea430afb3a09640ce7f020c906331f805"address_vps_two = "0xe86ee31b7d32b743907fa7438c422a1803717deb"client.get_balance(address_vps_one)client.get_balance(address_vps_two)

输出:

699916006000000000083000420044000000060

交易

让我们从主机发送拾三个以太网到VPS,1 GWEI=0.000000001 Ether。

输入:

amount = 12 # Ethersending_address = addressreceiving_address = address_vps_one

输入:

from getpass import getpass pw = getpass(prompt='Enter the password for the sender: ')

输入:

command = r'geth --exec "personal.unlockAccount("%s", "%s");" attach ' % (sending_address, pw)result = !$commandif result[0] != 'true': print('Fail: %s' % result[0])else: print('Account is unlocked!')

输出:

Account is unlocked!

tx_hash = client.send_transaction(to=receiving_address, _from=sending_address, value=amount * 10**9)

client.get_transaction_by_hash

输出:

{'blockHash': '0x0000000000000000000000000000000000000000000000000000000000000000', 'blockNumber': None, 'from': '0x8cf9deda0712f2291fb16739f8759e4a0a575854', 'gas': '0x15f90', 'gasPrice': '0x4a817c800', 'hash': '0x3d1a193ccfccc4e9ab2a411044069deeec2feef31a594bbf73726b463e8e90b4', 'input': '0x', 'nonce': '0xb', 'r': '0xe8698846a461938e800698fcc34570e0c4e9a3425f0bc441bf3e0716dab7b3e0', 's': '0x4fcd9bda8a1e98a7b0e8d953dec0cc733238c383d97393aa15c43963551f8daf', 'to': '0xc257beaea430afb3a09640ce7f020c906331f805', 'transactionIndex': '0x0', 'v': '0x42', 'value': '0x2cb417800'}

实践三个打通步骤

实施矿工以表明交易。

输入:

prev_balance_sen = client.get_balance(sending_address)prev_balance_rec = client.get_balance(receiving_address)

result = !geth --exec "miner.start();admin.sleepBlocks;miner.stop();" attachif result[0] != 'true': print('Fail: %s' % result[0])else: print("Mining finished!")

出口挖矿完毕:

Mining finished!

输入:

print("Received %d"% (client.get_balance(receiving_address)-prev_balance_rec))

出口收到金额:

Received 12000000000

率先检查余额的歧异,输入:

print("Difference of the sender %d"% (client.get_balance(sending_address)-prev_balance_sen))

输出:

Difference of the sender 4999999988000000000

对于采矿来讲,矿工将收获采矿奖金。

输入:

mining_bonus = 5000000000000000000

要获得以太网发送的多少,大家必要减去采矿奖金。

输入:

print("Amount difference: %d" % int(client.get_balance(sending_address)-prev_balance_sen - mining_bonus))

输出金额差异:

Amount difference: -12000000000

======================================================================

享用部分以太坊、EOS、比特币等区块链相关的人机联作式在线编程实战教程:

  • python以太坊,首若是指向python技术员使用web3.py举办区块链以太坊付出的详明。
  • java以太坊付出教程,重假如针对性java和android程序猿实行区块链以太坊开荒的web3j精解。
  • php以太坊,主固然介绍使用php实行智能合约开拓交互作用,进行账号成立、交易、转账、代币开垦以至过滤器和交易等剧情。
  • 以太坊入门教程,首要介绍智能合约与dapp应用开拓,符合入门。
  • 以太坊支出升级教程,首如若介绍使用node.js、mongodb、区块链、ipfs实现去大旨化电商DApp实战,契合升级。
  • C#以太坊,首要讲明如何使用C#支出基于.Net的以太坊应用,包蕴账户管理、状态与贸易、智能合约开荒与相互影响、过滤器和交易等。
  • EOS教程,本学科支持你快捷入门EOS区块链去中央化应用的开支,内容富含EOS工具链、账户与卡包、发行代币、智能合约开垦与安顿、使用代码与智能合约交互作用等骨干知识点,最毕竟结使用各知识点完结三个便签DApp的开荒。
  • java比特币开荒教程,本学科面向初读书人,内容即含有比特币的骨干概念,比方区块链存款和储蓄、去中央化共鸣机制、密钥与剧本、交易与UTXO等,同期也详细批注如何在Java代码中集成比特币援救作用,比如创制地址、管理卡包、构造裸交易等,是Java程序员超尘拔俗的比特币开垦学习课程。
  • php比特币开荒教程,本课程面向初读书人,内容即含有比特币的中央概念,举个例子区块链存款和储蓄、去中央化共鸣机制、密钥与剧本、交易与UTXO等,同一时候也详细批注怎么样在Php代码中集成比特币协理成效,举例成立地址、管理钱包、构造裸交易等,是Php技术员卓绝群伦的比特币开拓学习课程。
  • tendermint区块链开垦安详严整,本课程符合希望采用tendermint举办区块链开拓的技术员,课程内容即满含tendermint应用开辟模型中的大旨概念,比如ABCI接口、默克尔(Merkel卡塔 尔(英语:State of Qatar)树、多版本状态库等,也包涵代币发行等足够的实际操作代码,是go语言工程师快捷入门区块链开拓的一流接收。

汇智网原创翻译,转发请标记出处。这里是原来的文章在Python中动用以太坊RPC顾客端

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