SwapPair

These contracts manage liquidity pools

Each of our Swap Pairs is build with our stablecoin aUSD and one of our stock tokens. The SwapPair contract is similar to Uniswap V2 Pair.

For subgraph, you can track the events:

event Swap(
  address indexed sender,
  uint amount0In,
  uint amount1In,
  uint amount0Out,
  uint amount1Out,
  uint amount0InFee,
  uint amount1InFee,
  address indexed to
);
  
event Sync(uint112 reserve0, uint112 reserve1);

Base Info

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token0

function token0() external view returns (address);

Always returns the address of aUSD

token1

function token1() external view returns (address);

Returns the address of the paired stock token.

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getReserves

function getReserves() external view
returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

Returns the reserves of token0 and token1 used to price trades and distribute liquidity. Also returns the block.timestamp of the last block during which an interaction occured for the pair.

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getSwapFee

function getSwapFee(
    uint postReserve0,
    uint postReserve1
) external view
returns (uint feePercentage, bool isUsablePrice);

Given the reserves after a swap, it will return the swap feePecentage including dynamic fee (1e18 = 100%). isUsablePrice0 indicates if oracle is up-to-date and should always be true (as we update oracle in regular intervals).

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