https://github.com/varugasu/ether-deploy_contract
Simple Contract deployment into Rinkeby Test Network
https://github.com/varugasu/ether-deploy_contract
Last synced: 2 months ago
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Simple Contract deployment into Rinkeby Test Network
- Host: GitHub
- URL: https://github.com/varugasu/ether-deploy_contract
- Owner: varugasu
- License: mit
- Created: 2018-10-25T19:57:37.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2018-10-25T19:57:41.000Z (over 6 years ago)
- Last Synced: 2024-12-27T06:10:00.311Z (4 months ago)
- Language: Python
- Size: 2.93 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.MD
- License: LICENSE
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README
# Contract Deployment in Web3.py
## Deploying contract in Rinkeby Test Network through Infura API
### Requirements:
- web3.py 4.7.2
- API Key from [infura.io](https://infura.io)
- Source account and its private key
```
infuraApi = 'API'
account = 'SRC ACCOUNT'
key = 'PRIVATE KEY'
```
#### Contract:
```
pragma solidity ^0.4.22;
contract HelloWorld {
string public message;
constructor() public {
message = "Hello, World!";
}
function setMessage(string text) public payable{
require(msg.value >= 0.01 ether);
message = text;
}
}
```
A simple "Hello, World" program that allows to change its message which call be called with ".message().call()".
#### Compiling the Contract:
```python
from utils import contractSource
from solc import compile_source
contractCompiled = compile_source(contractSource("HelloWorld"))
contractInterface = contractCompiled[':HelloWorld']
```
###### Note: contractSource is a function defined in src/utils.py and its read the HelloWorld.sol file's content.
#### Creating the Contract:
```python
helloWorld = w3.eth.contract(abi=contractInterface['abi'], bytecode=contractInterface['bin'])
```
contractInterface returns a dict with the Contracts inside of .sol file. In this cenario there is only one "HelloWorld".
#### Building the transaction and sending it:
##### Defining the transaction's parameters:
```python
txParams = {
'gas': 2000000,
'gasPrice': w3.eth.gasPrice,
'nonce': w3.eth.getTransactionCount(account),
'chainId': 4, # Rinkeby Test Network
'from': account
}
```
##### Associating transaction's parameters with the Contract:
```python
tx = helloWorld.constructor().buildTransaction(txParams)
```
##### Signing the transaction with creator account's private key:
```python
signedTx = w3.eth.account.signTransaction(tx, key)
```
##### Sending the transaction to the Rinkeby Test Network:
```python
txReceipt = w3.eth.sendRawTransaction(signedTx.rawTransaction)
```
If sendRawTransaction is successful it returns a hash: 0xea1bb31684fa63f13008f11c3ddbfed444835e9e8d0a279ff806e52b8e527b95
which can be used to get the transaction's detail. Check in [rinkeby.etherscan.io](https://rinkeby.etherscan.io/tx/0xea1bb31684fa63f13008f11c3ddbfed444835e9e8d0a279ff806e52b8e527b95).
##### Getting transaction's detail:
```python
receipt = w3.eth.waitForTransactionReceipt(txReceipt)
```
The function above returns the following dictionary:
```python
AttributeDict({'blockHash': HexBytes('0x68dc9bc28a5e8fa2f5ff6325f13e8bd2f0560ca543bf011d71f9e1ed00f86e5c'),
'blockNumber': 3224432,
'contractAddress': '0x327fE98DaF48836e982396cF3cf4Bf468Ca11Ea8',
'cumulativeGasUsed': 5460633,
'from': '0xf31a44312c4cc8cfd207e5baa654f5597e461552',
'gasUsed': 282543,
'logs': [],
'logsBloom': HexBytes('a lot of zeros'),
'status': 1,
'to': None,
'transactionHash': HexBytes('0xea1bb31684fa63f13008f11c3ddbfed444835e9e8d0a279ff806e52b8e527b95'),
'transactionIndex': 9})
```
The 'contractAddress' field will be used to interact with the deployed contract in the next section.
#### Defining the interface and interacting with it:
```python
helloWorldInstance = w3.eth.contract(
receipt.contractAddress,
abi=contractInterface['abi'],
)
```
```python
helloWorldInstance.functions.message().call() # returns "Hello, World!"
```