Escrow

Unclassified

0x68322340ff01...0a10a9db5c57

ByzantiumExact Bytecode MatchEdit this contract

Deployed November 10, 2018 (7 years ago)Block 6,678,344

Owner-controlled ERC-20 escrow, first of 4,463 identical deployments in November 2018. Two owner-only functions: withdraw() and refund(). Source verified by EthereumHistory.

Byzantium EraVerified Source

Key Facts

Deployer

0x09862e...ac6091

Deployment Block

6,678,344

Deployment Date

Nov 10, 2018, 12:09 PM

Code Size

552.0 B

Gas at Deploy

351,285

Transactions by Year

20181

Deployment Transaction: 0xc8f0617340c9e88c...105a4d82a2ec0bf0

Description

This contract is the first of 4,463 identical Escrow contracts deployed in November 2018. Each holds a fixed amount of a specific ERC-20 token in escrow, with two owner-only functions: withdraw() sends the amount to a beneficiary address, and refund() sends it to a refund recipient. All parameters (owner, beneficiary, refund address, token, amount) are stored in state slots.

The source was reconstructed and matches the on-chain runtime code byte-for-byte (518 code bytes) when compiled with solc 0.4.24+commit.e67f0147 optimizer ON runs=200. Only the trailing 34-byte Swarm/CBOR metadata hash differs because the exact source formatting is not preserved; that formatting-only delta is Etherscan-tolerated on a source submission.

Proof: cartoonitunes/awesome-ethereum-proofs, folder escrow-withdraw-refund-0x68322340.

Source Verified

SolidityExact bytecode match(552 bytes)

Compiler: 0.4.24+

View verification proof

Exact match on 518 code bytes with solc 0.4.24 optimizer ON runs=200. Only the trailing 34-byte Swarm metadata hash differs (source formatting delta). Cluster: 4,463+ identical-runtime deployments November 2018.

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

Opcodes552

Unique Opcodes98

Jump Instructions23

Storage Operations11

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
pragma solidity ^0.4.0;

contract ERC20 {
    function transfer(address to, uint256 value) public returns (bool);
}

contract Escrow {
    address owner;         // slot 0
    address refundAddr;    // slot 1
    address benefAddr;     // slot 2
    address unused3;       // slot 3
    uint256 amount;        // slot 4
    address unused5;       // slot 5
    address token;         // slot 6

    function withdraw() public {
        require(msg.sender == owner);
        ERC20(token).transfer(benefAddr, amount);
    }

    function refund() public {
        require(msg.sender == owner);
        ERC20(token).transfer(refundAddr, amount);
    }
}

External Links

Etherscan Verified Source (if any)

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