package keeper import ( "context" errorsmod "cosmossdk.io/errors" sdk "github.com/cosmos/cosmos-sdk/types" "github.com/kava-labs/kava/x/swap/types" ) type msgServer struct { keeper Keeper } // NewMsgServerImpl returns an implementation of the swap MsgServer interface // for the provided Keeper. func NewMsgServerImpl(keeper Keeper) types.MsgServer { return &msgServer{keeper: keeper} } var _ types.MsgServer = msgServer{} // Deposit handles MsgDeposit messages func (m msgServer) Deposit(goCtx context.Context, msg *types.MsgDeposit) (*types.MsgDepositResponse, error) { ctx := sdk.UnwrapSDKContext(goCtx) if err := checkDeadline(ctx, msg); err != nil { return nil, err } depositor, err := sdk.AccAddressFromBech32(msg.Depositor) if err != nil { return nil, err } if err := m.keeper.Deposit(ctx, depositor, msg.TokenA, msg.TokenB, msg.Slippage); err != nil { return nil, err } ctx.EventManager().EmitEvent( sdk.NewEvent( sdk.EventTypeMessage, sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory), sdk.NewAttribute(sdk.AttributeKeySender, depositor.String()), ), ) return &types.MsgDepositResponse{}, nil } // Withdraw handles MsgWithdraw messages func (m msgServer) Withdraw(goCtx context.Context, msg *types.MsgWithdraw) (*types.MsgWithdrawResponse, error) { ctx := sdk.UnwrapSDKContext(goCtx) if err := checkDeadline(ctx, msg); err != nil { return nil, err } from, err := sdk.AccAddressFromBech32(msg.From) if err != nil { return nil, err } if err := m.keeper.Withdraw(ctx, from, msg.Shares, msg.MinTokenA, msg.MinTokenB); err != nil { return nil, err } ctx.EventManager().EmitEvent( sdk.NewEvent( sdk.EventTypeMessage, sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory), sdk.NewAttribute(sdk.AttributeKeySender, from.String()), ), ) return &types.MsgWithdrawResponse{}, nil } // SwapExactForTokens handles MsgSwapExactForTokens messages func (m msgServer) SwapExactForTokens(goCtx context.Context, msg *types.MsgSwapExactForTokens) (*types.MsgSwapExactForTokensResponse, error) { ctx := sdk.UnwrapSDKContext(goCtx) if err := checkDeadline(ctx, msg); err != nil { return nil, err } requester, err := sdk.AccAddressFromBech32(msg.Requester) if err != nil { return nil, err } if err := m.keeper.SwapExactForTokens(ctx, requester, msg.ExactTokenA, msg.TokenB, msg.Slippage); err != nil { return nil, err } ctx.EventManager().EmitEvent( sdk.NewEvent( sdk.EventTypeMessage, sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory), sdk.NewAttribute(sdk.AttributeKeySender, requester.String()), ), ) return &types.MsgSwapExactForTokensResponse{}, nil } // SwapForExactTokens handles MsgSwapForExactTokens messages func (m msgServer) SwapForExactTokens(goCtx context.Context, msg *types.MsgSwapForExactTokens) (*types.MsgSwapForExactTokensResponse, error) { ctx := sdk.UnwrapSDKContext(goCtx) if err := checkDeadline(ctx, msg); err != nil { return nil, err } requester, err := sdk.AccAddressFromBech32(msg.Requester) if err != nil { return nil, err } if err := m.keeper.SwapForExactTokens(ctx, requester, msg.TokenA, msg.ExactTokenB, msg.Slippage); err != nil { return nil, err } ctx.EventManager().EmitEvent( sdk.NewEvent( sdk.EventTypeMessage, sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory), sdk.NewAttribute(sdk.AttributeKeySender, requester.String()), ), ) return &types.MsgSwapForExactTokensResponse{}, nil } // checkDeadline returns an error if block time exceeds an included deadline func checkDeadline(ctx sdk.Context, msg sdk.Msg) error { deadlineMsg, ok := msg.(types.MsgWithDeadline) if !ok { return nil } if deadlineMsg.DeadlineExceeded(ctx.BlockTime()) { return errorsmod.Wrapf( types.ErrDeadlineExceeded, "block time %d >= deadline %d", ctx.BlockTime().Unix(), deadlineMsg.GetDeadline().Unix(), ) } return nil }