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All interactions go through Controller.execute. The enum and structs below reflect the current main branch. 
enum Action {
  OPEN,
  MAKE,
  LIMIT,
  TAKE,
  SPEND,
  CLAIM,
  CANCEL
}

function execute(
  Action[] calldata actionList,
  bytes[] calldata paramsDataList,
  uint64 deadline
) external returns (OrderId[] memory ids);

​
Structs (IController)

struct MakeOrderParams {
  BookId id;
  Tick tick;
  uint256 quoteAmount;
  address referrer;
}

struct LimitOrderParams {
  BookId takeBookId;
  BookId makeBookId;
  uint256 limitPrice;
  Tick tick;
  uint256 quoteAmount;
  address referrer;
}

struct TakeOrderParams {
  BookId id;
  uint256 limitPrice;
  uint256 quoteAmount;
  uint256 maxBaseAmount;
  address referrer;
}

struct SpendOrderParams {
  BookId id;
  uint256 limitPrice;
  uint256 baseAmount;
  uint256 minQuoteAmount;
  address referrer;
}

struct ClaimOrderParams {
  OrderId id;
}

struct CancelOrderParams {
  OrderId id;
  uint256 leftQuoteAmount;
}

​
Encoding schemas

When you build paramsDataList[i], encode the fields above in order using ABI parameter types:
  • BookId → uint192
  • OrderId → uint256
  • Tick → int24