ShapeShift Chain-Split Receiver

utility

0x89afcc1452d4...fc0691a51456

DAO ForkContract #21KExact Bytecode MatchEdit this contract

Deployed July 26, 2016 (10 years ago)Block 1,957,039

ShapeShift ETH/ETC routing contract (Jul 26, 2016). Twin instance of the ShapeShiftReceiver — identical bytecode, configured for the opposite chain fork state.

DAO Fork EraVerified Source

Historical Significance

Twin to 0x3e7756, demonstrating ShapeShifts dual-chain deposit routing architecture. The pair represents the first known use of an external chain oracle to automatically segregate ETH and ETC deposits at the smart contract level.

Context

The pair of ShapeShiftReceiver contracts (0x3e7756 and 0x89afcc) were deployed in blocks 1,957,038 and 1,957,039 -- consecutive blocks, within seconds of each other. This mirrors the dual-chain problem they solve: two chains, two receivers, one oracle.

Key Facts

Deployer

0x9e6316...baf227

Deployment Block

1,957,039

Deployment Date

Jul 26, 2016, 05:39 PM

Code Size

287.0 B

Gas at Deploy

176,585

Transactions by Year

20162

Deployment Transaction: 0xd9141b79dde08c02...7e35a42fe4a83b3f

Description

Deployed July 26, 2016 — 6 days after the DAO hard fork. Twin instance of 0x3e7756, deployed in the immediately following block by the same ShapeShift ETH wallet. Identical 287-byte bytecode, configured with forked=false for the ETC chain routing (where forked() oracle returns false). Together with its sibling, the ShapeShiftSplit contract, and the earlier 94-byte forwarder, these represent the first on-chain smart contract infrastructure deployed by ShapeShift.

Source Verified

SolidityExact bytecode match(287 bytes)

Compiler: solc v0

View verification proof

Identical bytecode to 0x3e7756b1 (287 bytes). Same source, same compiler, different constructor arguments.

Heuristic Analysis

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

Detected Type: utility

DAO Fork Era

The controversial fork to recover funds from The DAO hack.

Block span: 1,920,000 — 2,462,999

July 20, 2016 — October 18, 2016

Bytecode Overview

Opcodes287

Unique Opcodes57

Jump Instructions16

Storage Operations7

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

contract Forked {
    function forked() returns (bool);
}

contract ShapeShiftReceiver {
    address forkedContract;
    address public target;
    bool public forked;

    function ShapeShiftReceiver(address _forkedContract, address _target, bool _forked) {
        forkedContract = _forkedContract;
        target = _target;
        forked = _forked;
    }

    function() {
        if (Forked(forkedContract).forked() != forked || msg.value == 0 || !target.send(msg.value)) throw;
    }
}

External Links

Etherscan Verified Source (if any)

Related contracts

ShapeShift Chain-Split Forwarder

Same deployer

Earliest ShapeShift on-chain contract (Jul 24, 2016). Simple ETH forwarder with an active flag — routes deposits to target when active and msg.value > 0.

0xa2d5c5...d549deJuly 24, 2016