Saikat Karmakar Aviksaikat

💭

I tell people secrets, it makes them like me

Aviksaikat / .gitignore

Last active April 23, 2023 19:29

gitignore for Python projects

	# Byte-compiled / optimized / DLL files
	__pycache__/
	*.py[cod]
	*$py.class

	# C extensions
	*.so

	# Distribution / packaging
	.Python

Aviksaikat / derive.py

Last active April 23, 2023 19:36

Generate Ethereum private key, public key, and address using Python code

	import sha3
	from ecdsa import SigningKey, SECP256k1

	# Create a keccak_256 hash object
	keccak = sha3.keccak_256()

	# Generate a new private key using the SECP256k1 curve
	private = SigningKey.generate(curve=SECP256k1)

	# Get the corresponding public key in bytes format

Aviksaikat / abi_encode.py

Last active May 20, 2024 07:44

Correct way to generate keccak256 hash of multiple data types using python

	from brownie import web3
	# wrong
	print(web3.solidityKeccak(["uint256", "address", "uint256"],[2, "0x0000000000000000000000000000000000001337", 8948253]).hex())
	# >> 0x7c251610f9474d6a5f00096d05e0ae40e433cae67c90e400cf88aad9f24398ef

	# right
	from eth_abi import encode
	encoded_data = encode(
	["uint256", "address", "uint256"],
	[2, "0x0000000000000000000000000000000000001337", 8948253],

Aviksaikat / network-config.yaml

Created May 6, 2023 12:54

Test locally on goerli-fork. Add this to your `network-config.yaml`

Aviksaikat / ape-config.yaml

Last active May 15, 2023 19:46

Sample config file for ApeWorkX

	name: simple_storage
	plugins:
	- name: solidity
	version: 0.6.3 # version of the plugin
	- name: ganache
	- name: alchemy
	- name: hardhat
	# - name: ens
	# - name: etherscan
	ethereum:

Aviksaikat / b32-u256.py

Last active May 20, 2024 07:43

bytes32 to int(uint256)

Aviksaikat / int_to_b32.py

Created May 15, 2023 13:27

convert an integer to bytes32

	from brownie import web3

	value = 1

	# * convert it to bytes32
	value = value.to_bytes(32, byteorder="big")
	>>> value
	b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01'

	>>> value.hex()

Aviksaikat / encodeWithSignature.py

Created May 16, 2023 23:51

How to do `abi.encodeWithSignature` in python

	value = Contract.methodName.encode_input()
	print(value)
	# wrong
	# >> '0xa7a7e4e8'
	value = Contract.methodName.encode_input()
	# add padding to make it 32 bytes
	value = value + "0" * (66 - len(value))
	print(value)
	# correct
	#>> '0xa7a7e4e800000000000000000000000000000000000000000000000000000000'

Aviksaikat / update_docker_images.sh

Last active May 18, 2023 11:08

Update all your docker images

	docker images --format "{{.Repository}}:{{.Tag}}" \| xargs -L1 docker pull

	# then remove the "<none>" tagged images
	docker images \| grep "<none>" \| awk '{print $3}' \| xargs docker rmi

Aviksaikat / remove.sh

Created May 18, 2023 11:09

remove none tagged docker images

docker images | grep "<none>" | awk '{print $3}' | xargs docker rmi