ATOMIC SETTLEMENT
Two parties. One transaction. Both legs or neither.
Both or Neither settles a bilateral swap between two named counterparties. Not a pool, not an order book, no liquidity provider in the middle. Party A holds one asset, party B holds another, they agree a rate, and the exchange happens in a single transaction that either completes for both of them or reverts for both of them.
We wrote it against Ethereum because that is the toolchain we knew. We are rebuilding it because a public chain is the wrong venue for a private trade.
WHAT RUNS NOW
The Solidity version, exactly as it stands.
A bilateral escrow contract in Solidity. It compiles, the logic is complete, and it has not been deployed anywhere. Everything below is checkable against the source, which is in the repository.
| Contract | BilateralSwap.sol, 131 lines, no inheritance, no proxy, no admin |
|---|---|
| Compiler | solc 0.8.24 with optimizer, 3,726 bytes of bytecode |
| Settlement | One settle call moves both legs. Partial settlement is not reachable. |
| Failure mode | Either party can cancel after the deadline and both deposits return |
| Custody | The contract holds during the window. No admin key exists that can move funds. |
| Tests | 9 written against Foundry covering settle, cancel, deadline and access paths. Not yet run. |
| Deployed | Nowhere. Not on mainnet, not on a testnet. |
We would rather say the contract is not deployed than point at a testnet address nobody can find. Every line above can be checked by cloning the repository and compiling it, which takes about a minute.