ShapeShift Chain-Split Splitter

0xfdc6a6ad6711...3d601ee2dbbf

DAO ForkContract #21KExact Bytecode MatchEdit this contract

Deployed July 26, 2016 (10 years ago)Block 1,957,123

ShapeShift conditional ETH splitter (Jul 26, 2016). split(address,uint) routes ETH to a specified address — but only on the ETC chain (where forked() returns false). Returns false on ETH chain.

DAO Fork EraVerified Source

Historical Significance

The only contract in ShapeShifts July 2016 chain-split family with an explicit callable function rather than a pure fallback. The double forked() oracle call pattern may reflect caution during an operationally uncertain post-fork environment.

Context

All four ShapeShift chain-split contracts (0xa2d5c5, 0x3e7756, 0x89afcc, 0xfdc6a6) were deployed by the same wallet (0x9e6316f44baeeee5d41a1070516cc5fa47baf227) between July 24-26, 2016 -- during the six days between the DAO hard fork and when replay protection via EIP-155 was broadly adopted. ShapeShift, funded through a Genesis allocation of approximately 36,000 ETH traceable to Erik Voorhees, was among the first exchanges to deploy on-chain routing logic in response to the fork.

Key Facts

Deployer

0x9e6316...baf227

Deployment Block

1,957,123

Deployment Date

Jul 26, 2016, 06:00 PM

Code Size

301.0 B

Gas at Deploy

156,460

Deployment Transaction: 0xd7bdfe67bb4e9de4...4dee56e9e3d85a16

Description

Deployed July 26, 2016, the same day as the ShapeShiftReceiver twins. The split() function takes a target address and ETH amount, calls the forked() oracle twice to verify chain state, and routes funds only on the ETC chain. On the ETH chain (where forked() returns true), it returns false immediately without sending. The double forked() call pattern — first to short-circuit if on ETH, second to confirm before sending — appears intentional for safety. Deployed alongside the two ShapeShiftReceiver contracts within the same hour.

Source Verified

SolidityExact bytecode match(301 bytes)

Compiler: solc v0

View verification proof

Exact runtime bytecode match (301 bytes). The two forked() calls are present in source — first call short-circuits if on ETH chain, second verifies before sending on ETC chain. Matches solc v0.2.1 through v0.3.5 with optimizer.

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

Opcodes301

Unique Opcodes53

Jump Instructions15

Storage Operations2

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 ShapeShiftSplit {
    address forkedContract;

    function ShapeShiftSplit(address _forkedContract) {
        forkedContract = _forkedContract;
    }

    function split(address _to, uint _value) returns (bool) {
        if (Forked(forkedContract).forked()) return false;
        if (!Forked(forkedContract).forked() && _to.send(_value)) return true;
        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

ShapeShift Chain-Split Receiver

Same deployer

ShapeShift ETH/ETC routing contract (Jul 26, 2016). Forwards ETH to target only when on-chain forked() oracle result matches stored boolean — routing deposits to the correct wallet on each chain post-DAO-fork.

0x3e7756...2e7a25July 26, 2016

ShapeShift Chain-Split Receiver

Same deployer

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

0x89afcc...a51456July 26, 2016