Ethereum topic updated

omidraha · Sep 12, 2018 · 0d2fce2 · 0d2fce2
1 parent dc37353
commit 0d2fce2
Showing 1 changed file with 145 additions and 6 deletions.
diff --git a/src/blockchain/ethereum.rst b/src/blockchain/ethereum.rst
@@ -8,22 +8,161 @@ https://www.infura.io/register
 
 .. code-block:: python
 
+
+    from eth_account.messages import defunct_hash_message
+    from solc import compile_source
     from web3 import Web3
+    from web3.providers.rpc import HTTPProvider
+
+    endpoint_url = 'https://ropsten.infura.io/v3/549a3096fb7d410381ba844e3930cfc5'
+
+    web3 = Web3(HTTPProvider(endpoint_url))
+
+
+    # https://web3py.readthedocs.io/en/latest/web3.eth.account.html
+    def create_keys():
+        account = web3.eth.account.create()
+        return account.address, account.privateKey
+
+
+    def sign_message(text, private_key):
+        message_hash = defunct_hash_message(text=text)
+        signed_message = web3.eth.account.signHash(message_hash, private_key=private_key)
+        return message_hash, signed_message
+
+
+    def verify_message(text, signed_message):
+        message_hash = defunct_hash_message(text=text)
+        recover = web3.eth.account.recoverHash(message_hash, signature=signed_message.signature)
+        return recover
+
+
+    def verify_message_from_message_hash(message_hash, signature):
+        recover = web3.eth.account.recoverHash(message_hash, signature=signature)
+        return recover
+
+
+    # Solidity source code
+    contract_source_code = '''
+    pragma solidity ^0.4.21;
+
+    contract Greeter {
+        string public greeting;
+
+        function Greeter() public {
+            greeting = 'Hello';
+        }
+
+        function setGreeting(string _greeting) public {
+            greeting = _greeting;
+        }
+
+        function greet() view public returns (string) {
+            return greeting;
+        }
+    }
+    '''
+
+    address, pk = create_keys()
+
+    address = web3.toChecksumAddress(address)
+
+    compiled_sol = compile_source(contract_source_code)  # Compiled source code
+    contract_interface = compiled_sol['<stdin>:Greeter']
+
+    print('web3.eth.blockNumber', web3.eth.blockNumber)
+
+    abi, bytecode = contract_interface['abi'], contract_interface['bin']
+
+    contract = web3.eth.contract(bytecode=bytecode, abi=abi)
+
+    print('address', address)
+
+    # sample valid address
+    to_address = web3.toChecksumAddress('0x7f508c2666a3b40598572d7232ec4fb95162fd9a')
+
+    transaction = {
+        'to': to_address,
+        'value': 1000000000000000000,
+        'gas': 4700000,
+        'gasPrice': web3.eth.gasPrice,
+        'nonce': web3.eth.getTransactionCount(address)
+    }
+
+    tx = contract.buildTransaction(transaction).setGreeting('Omid')
+    signed = web3.eth.account.signTransaction(tx, pk)
+
+    final = web3.eth.sendRawTransaction(signed.rawTransaction)
+    
+    print('final', final)
+    print('fin:', web3.toHex(final))
+
+    ###############################
+
+
+    transaction = {
+        'to': to_address,
+        'value': 1000000000000000000,
+        'gas': 4700000,
+        'gasPrice': web3.eth.gasPrice,
+        'nonce': web3.eth.getTransactionCount(address),
+        'data': b'A' * 32655
+    }
+
+    signed = web3.eth.account.signTransaction(transaction, pk)
+    final = web3.eth.sendRawTransaction(signed.rawTransaction)
+
+    print('final', final)
+    print('fin:', web3.toHex(final))
+
+    ###############################
+
+
+
+
+Solidity
+--------
+
+https://github.com/ethereum/py-solc
+
+
+.. code-block:: bash
+
+    $ pip install py-solc
+    $ python -m solc.install v0.4.21
+    $ export PATH="~/.py-solc/solc-v0.4.21/bin/:$PATH"
+
+
+Online solidity
+---------------
+
+https://remix.ethereum.org/#optimize=true&version=builtin
+
+https://ethereum.github.io/browser-solidity/#optimize=false&version=soljson-v0.4.25-nightly.2018.9.10+commit.86d85025.js
+
+
+
+
 
+Links
+--------
 
-    api_key = '****'
+https://ropsten.etherscan.io/tx/
 
-    api_secret = '****'
+https://hackernoon.com/ethereum-smart-contracts-in-python-a-comprehensive-ish-guide-771b03990988
 
-    endpoint_url = 'https://mainnet.infura.io/v3/********'
+https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn?hl=en
 
+https://ethereum.stackexchange.com/questions/11495/best-way-to-test-a-smart-contract
 
-    web3 = Web3(Web3.HTTPProvider(endpoint_url))
 
-    print(web3.eth.blockNumber)
-    print(web3.eth.getBlock('latest'))
+https://metamask.io/
 
+https://faucet.metamask.io/
 
+https://gist.github.com/Kcrong/1f832a2f4ab861da3d852c5b0a30ef47
 
 
+http://justin.yackoski.name/winp/
 
+https://web3py.readthedocs.io/en/stable/contracts.html#contract-deployment-example