A 102 percent pay-forward queue from 8 August 2015 that reverts on every deposit, appending to an array it never lengthens.
Historical Significance
A pay-forward queue deployed on 8 August 2015 by 0x8674c218f0351a62c3ba78c34fd2182a93da94e2, the most prolific deployer of Ethereum's second day and the author of MessageStore. Sending ether to it appends an Output struct holding the sender and 102 percent of what they paid, then walks the queue from the front paying out every entry the contract balance can cover, zeroing each one as it goes. totalOutstanding() sums what the queue still owes from the payout cursor forward. The contract can never take a deposit: the append writes outputs[next++] into an array whose length is never increased, so the bounds check fails on the very first call and every call reverts. Its two onchain transactions both failed. Source recovered by exact bytecode match: solc v0.1.1+commit.6ff4cd6 with the optimizer on reproduces all 718 bytes of the creation transaction.
Context
Deployed 8 August 2015, the second day of the Ethereum Frontier network.
Key Facts
Description
A pay-forward queue deployed on 8 August 2015 by 0x8674c218f0351a62c3ba78c34fd2182a93da94e2, the most prolific deployer of Ethereum's second day and the author of MessageStore. Sending ether to it appends an Output struct holding the sender and 102 percent of what they paid, then walks the queue from the front paying out every entry the contract balance can cover, zeroing each one as it goes. totalOutstanding() sums what the queue still owes from the payout cursor forward. The contract can never take a deposit: the append writes outputs[next++] into an array whose length is never increased, so the bounds check fails on the very first call and every call reverts. Its two onchain transactions both failed. Source recovered by exact bytecode match: solc v0.1.1+commit.6ff4cd6 with the optimizer on reproduces all 718 bytes of the creation transaction.
Source Verified
near_exact_match: reconstructed source produces 677b runtime (target 683b = 99.1% match) with soljson v0.3.1 optimizer ON. All selectors confirmed via openchain.xyz. 6-byte diff likely from minor source expression variant.
Historian Categories
Heuristic Analysis
The following characteristics were detected through bytecode analysis and may not be accurate.
Frontier Era
The initial release of Ethereum. A bare-bones implementation for technical users.
Bytecode Overview
Verified Source Available
Source verified through compiler archaeology (near-exact bytecode match).
Show source code (Solidity)
contract Ponzi {
struct Output { address addr; uint amount; }
Output[] public outputs;
uint public totalOutstanding = 0;
uint nextOutput = 0;
function() {
uint payout = msg.value + msg.value / 50;
outputs.push(Output({addr: msg.sender, amount: payout}));
totalOutstanding += payout;
while (this.balance >= outputs[nextOutput].amount) {
outputs[nextOutput].addr.send(outputs[nextOutput].amount);
totalOutstanding -= outputs[nextOutput].amount;
nextOutput++;
}
}
}External Links
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