Wallet

Unclassified

0x001febc305e1...27c7bd9e7a4f

ByzantiumSource VerifiedEdit this contract

Bytecode verified via sibling

This contract shares identical runtime bytecode with a verified contract (0x7eb37d5b...) which has been verified through compiler archaeology.

Deployed January 20, 2018 (8 years ago)Block 4,937,833

Owner wallet that forwards ether to its owner, logs any call from a stranger with the full calldata, and lets the owner execute arbitrary calls.

Byzantium EraVerified Source

Historical Significance

Logging the whole calldata of unrecognised calls is the distinguishing feature. Most wallets of this shape either revert on unknown selectors or accept them silently; this one keeps an on chain record of every attempt, including the payload, which makes the contract its own audit trail for interactions its author never anticipated.

Key Facts

Deployer

0xb698bb...5b8fe3

Deployment Block

4,937,833

Deployment Date

Jan 20, 2018, 01:26 AM

Code Size

644.0 B

Gas at Deploy

246,551

Transactions by Year

20192

Deployment Transaction: 0x0f58faf50f3a9d63...518ca5f5da1b424a

Description

The payable fallback has two jobs. If the caller is not the owner it emits Transaction carrying the sender, this contract, the value and the entire calldata, which turns the wallet into a recorder for anything sent to it. Then, whenever the value is above zero, it forwards that value to the owner.

execute is owner gated and makes an arbitrary call with value and payload, using assert rather than require so a failure consumes the remaining gas. The owner is readable.

Heuristic Analysis

The following characteristics were detected through bytecode analysis and may not be accurate.

Detected Type: Unclassified

Byzantium Era

First Metropolis hard fork. Added zk-SNARK precompiles, REVERT opcode, and staticcall.

Block span: 4,370,000 — 7,279,999

October 16, 2017 — February 28, 2019

Bytecode Overview

Opcodes644

Unique Opcodes127

Jump Instructions27

Storage Operations8

Verified Source Available

This contract has verified source code on Etherscan.

Verified on Etherscan Verified on Sourcify

Show source code (Solidity)

{{
  "language": "Solidity",
  "sources": {
    "Wallet.sol": {
      "content": "// Submitted by EthereumHistory (ethereumhistory.com)\npragma solidity ^0.4.18;\n\ncontract Wallet {\n    address public owner;\n\n    event Transaction(address from, address to, uint256 value, bytes data);\n\n    function () public payable {\n        if (owner != msg.sender) {\n            Transaction(msg.sender, this, msg.value, msg.data);\n        }\n        if (msg.value > 0) {\n            owner.transfer(msg.value);\n        }\n    }\n\n    function execute(address _to, uint256 _value, bytes _data) public {\n        assert(owner == msg.sender);\n        assert(_to.call.value(_value)(_data));\n    }\n}\n"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}

External Links

Etherscan Verified Source (if any)