pcaversaccio

Reentrancy for Solidity Built-in Functions transfer and send

I only show this here for transfer, but it also applies to send.

// SPDX-License-Identifier: WTFPL
pragma solidity 0.8.29;

contract Victim {
    mapping(address account => uint256 balances) public balances;

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import base58
import hashlib


def eth_to_tron(eth_address):
    eth_address_bytes = bytes.fromhex(
        eth_address[2:] if eth_address.startswith("0x") else eth_address
    )
    tron_address_bytes = b"\x41" + eth_address_bytes
    checksum = hashlib.sha256(hashlib.sha256(tron_address_bytes).digest()).digest()[:4]

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import hashlib


def base58_encode(data: bytes) -> str:
    alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
    value = int.from_bytes(data, "big")
    result = []

    while value:
        value, remainder = divmod(value, 58)

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# pragma version ~=0.4.0rc5
"""
@title `erc4626_fees` Module Reference Implementation
@custom:contract-name erc4626_fees_mock
@license GNU Affero General Public License v3.0 only
@author pcaversaccio
@custom:security I have coded this in ~30mins. It's completely
                 untested code, so please be careful!
"""

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🐍 How to get started with Vyper modules

1. Create a new, clean testing directory test

mkdir test
cd test

2. Set up pyenv

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# pragma version ^0.3.10
"""
@title P256 Signature Verification Function
@custom:contract-name P256Verifier
@license GNU Affero General Public License v3.0 only
@author pcaversaccio
@notice The `verify` function can be used to natively (currently
        only supported on Polygon Mumbai test network) verify a
        P256 (a.k.a. secp256r1 elliptic curve) signature. For more
        technical details, please refer to EIP-7212:

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// SPDX-License-Identifier: MIT

// File: @openzeppelin/contracts/math/SafeMath.sol

// Original license: SPDX_License_Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow

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Setup

Update Linux

sudo apt update && sudo apt upgrade

Install build-essential Packages

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# @version ^0.3.10


_CREATE2_PREFIX: constant(bytes32) = 0x2020dba91b30cc0006188af794c2fb30dd8520db7e2c088b7fc7c103c00ca494


@external
@pure
def compute_create2_address_zksync(salt: bytes32, bytecode_hash: bytes32, deployer: address, input: Bytes[4_096]=b"") -> address:
    constructor_input_hash: bytes32 = keccak256(input)

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# @version ^0.3.9

@internal
@pure
def _to_2098_format(signature: Bytes[65]) -> Bytes[64]:
    """
    @dev Transforms a standard signature into an EIP-2098
         (https://eips.ethereum.org/EIPS/eip-2098) compliant
         signature.
    @param signature The secp256k1 64/65-bytes signature.