Contracts for Swap, Swear and Swindle.
Please note that all contracts within this repository are considered highly experimental and may cause loss of funds if used in production.
The master branch only contains the SimpleSwap contract for now. Everything else (full Swap, Swear and Swindle) can be found in the experimental branch.
This is a hardhat project using the truffle plugin (for tests as this used to be truffle-based). You can run tests using yarn test.
yarn
yarn testTo also generate coverage information use yarn coverage instead.
This repo currently uses solhint as linter. It can be called through yarn:
yarn lintTo generate go bindings use
yarn abigenThis will generate the bindings in the bindings/ directory. Suitable versions of solc and abigen have to be installed for this to work.
Alternatively this can also be done through docker:
docker build -t sw3 -f Dockerfile.abigen .
docker run -v $(pwd)/bindings:/sw3/bindings sw3 yarn abigenIn addition to the file from abigen this will also generate a go file that includes the runtime bytecode.
The go bindings are automatically generated on every release git tag and the pushed to the ethersphere/go-sw3 repository.
Swap is deployed on the following testnets:
| Network | Factory | Token |
|---|---|---|
| Goerli | 0xf0277caffea72734853b834afc9892461ea18474 | 0x2aC3c1d3e24b45c6C310534Bc2Dd84B5ed576335 |
SimpleSwap is a chequebook-style contract with support hard deposits.
The issuer can issue cheques. Those are a signed piece of data containing the swap address, a beneficiary, and a cumulative amount. If the beneficiary wishes to cash the cheque it needs to be sent to the contract using the cashChequeBeneficiary function. Alternatively anyone else can also cash the cheque using cashCheque provided they have a signature from the beneficiary. In that case they might also get a portion of the payout as a fee. If there is not enough liquid balance in the contract part of the cheque might bounce (whether the full cheque was paid out should be verified through the ChequeCashed event). Later the beneficiary can try cashing again to get the remaining amount.
The issuer can lock a certain amount of the balance to a specific beneficiary (increaseHardDeposit) to give solvency guarantees up to the amount of the hard deposit. Decreasing a hard deposit is a two step process: First it needs to be prepared (prepareDecreaseHardDeposit) to start a security delay, which the beneficiary can use to cash the outstanding cheques. Afterwards the deposit can be decreased (decreaseHardDeposit).
The balance not covered by hard deposits can be withdrawn by the issuer at any time.
For signing purposes the chequebook uses EIP-712 Ethereum typed structured data hashing and signing. The EIP712Domain domain name is Chequebook in version 1.0. The chainId field is used, the verifyingContract and salt fields are omitted.
| Field | Type | Description |
|---|---|---|
| swap | address | the swap contract this is for |
| beneficiary | address | beneficiary of the cheque |
| cumulativePayout | uint256 | cumulative amount |
| Field | Type | Description |
|---|---|---|
| swap | address | the swap contract this is for |
| sender | address | the address allowed to submit this cheque |
| requestPayout | uint256 | the maximum amount that should be paid out |
| recipient | address | the target of the payment |
| calleePayout | uint256 | amount of the payout that should go the caller |
| Field | Type | Description |
|---|---|---|
| swap | address | the swap contract this is for |
| beneficiary | address | beneficiary of the hard deposit |
| decreaseTimeout | uint256 | new timeout |
SimpleSwap has an accompanying factory contract SimpleSwapFactory. Deploying through the factory guarantees that the SimpleSwap contract was deployed with the correct init code.
Swap is SimpleSwap extended with support for promissory notes. You can find it in the experimental branch.
Swear and Swindle are the contracts for the trial system of sw3. You can find them in the experimental branch.