Truffle Migrations contract (trimmed variant) — tracks the last completed migration index in `lastCompletedMigration`, restricted to the deployer. Cluster of 6 identical deployments.
Key Facts
Description
One of 6 identical deployments of the Truffle Migrations helper contract. Two public slots: address owner (set in constructor to msg.sender) and uint public lastCompletedMigration. A single mutation function setCompleted(uint completed) restricted writes the migration index, guarded by a modifier that only executes when caller equals owner. This variant omits the standard upgrade(address) helper. Compiled with solc 0.4.18+commit.9cf6e910 optimizer OFF. Exact code match; only trailing 34-byte Swarm metadata differs.
Source Verified
Exact code match on 259 code bytes with solc 0.4.18 opt OFF. Only trailing 34-byte Swarm metadata differs. Etherscan-verified with EthereumHistory attribution.
Heuristic Analysis
The following characteristics were detected through bytecode analysis and may not be accurate.
Byzantium Era
First Metropolis hard fork. Added zk-SNARK precompiles, REVERT opcode, and staticcall.
Bytecode Overview
Verified Source Available
Source verified through compiler archaeology and exact bytecode matching.
Show source code (Solidity)
// Submitted by EthereumHistory (ethereumhistory.com)
pragma solidity ^0.4.0;
contract Migrations {
address owner;
uint public lastCompletedMigration;
modifier restricted() {
if (msg.sender == owner) _;
}
function Migrations() {
owner = msg.sender;
}
function setCompleted(uint completed) restricted {
lastCompletedMigration = completed;
}
}External Links
Related contracts
Migrations
Same deployerTruffle Migrations contract (trimmed variant) — tracks the last completed migration index in `lastCompletedMigration`, restricted to the deployer. Cluster of 6 identical deployments.
0x2327a7...24e62dJune 13, 2018Msg
Same eraMinimal contract that stores a single public string in state, exposed via the auto-generated m() getter. First of 281 identical siblings. Source verified by EthereumHistory.
0x2c8f58...37b173January 13, 2018Sweeper
Same eraMinimal ETH sweeper, first of 1,900 identical deployments in a 2-day burst in January 2018. All sweep to a single hardcoded destination. Source verified by EthereumHistory.
0xeb15f6...6cb3e1January 23, 2018Sweep
Same eraETH sweep-to-fixed-recipient — fallback forwards the contract's entire balance to `0xd293a88c…8d4` via `.send()` and reverts on failure. Massive cluster of 1899 identical deployments — likely deposit-address contracts for a single custodian.
0x00188b...b260a7January 23, 2018Msg
Same eraTrivial public-message store — single `string public m` variable with the auto-generated `m()` getter. Cluster of 280 identical deployments.
0x02d01d...ac2cdcFebruary 10, 2018HashStore
Same eraMinimal view-only contract holding a single uint256 hash in state, exposed via getHash(). First of 328 identical siblings. Source verified by EthereumHistory.
0xf37137...2aaabeMarch 14, 2018