Origin Swap

Optimized swap contracts for specific high volume stable pairs.

Mainnet deployment

WETH/stETH: 0x85B78AcA6Deae198fBF201c82DAF6Ca21942acc6

Swap interface

Barebone swap interface:

function swapExactTokensForTokens(
  IERC20 inToken,
  IERC20 outToken,
  uint256 amountIn,
  uint256 amountOutMin,
  address to
) external;

function swapTokensForExactTokens(
  IERC20 inToken,
  IERC20 outToken,
  uint256 amountOut,
  uint256 amountInMax,
  address to)
external;

Uniswap V2 Router compatible swap interface:

function swapExactTokensForTokens(
  uint amountIn,
  uint amountOutMin,
  address[] calldata path,
  address to,
  uint deadline
) external returns (uint[] memory amounts);

function swapTokensForExactTokens(
  uint amountOut,
  uint amountInMax,
  address[] calldata path,
  address to,
  uint deadline
) external returns (uint[] memory amounts);

See the inline documentation in the OSwapBase.sol source file for more details.

Development

Install

foundryup
forge install
forge compile

Running tests

All tests are fork tests against the actual WETH and STETH contract

forge test --fork-url="$PROVIDER_URL" --fork-block-number=18715431 --gas-report

Running gas report scripts

In a terminal, run anvil

anvil --fork-url="$PROVIDER_URL" --fork-block-number=18715431

In another terminal, run the gas report scripts:

forge script script/GasReportSetup.s.sol --broadcast --rpc-url http://localhost:8545
export OSWAP=<OSwap deploy address from the logs>
export AGGREGATOR=<Aggregator deploy address from the logs>
forge script script/GasReportRun.s.sol --broadcast --rpc-url http://localhost:8545