/
handler.go
81 lines (66 loc) · 2.66 KB
/
handler.go
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package swap
import (
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/kava-labs/kava/x/swap/keeper"
"github.com/kava-labs/kava/x/swap/types"
)
// NewHandler creates an sdk.Handler for swap messages
func NewHandler(k Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
ctx = ctx.WithEventManager(sdk.NewEventManager())
if deadlineMsg, ok := msg.(types.MsgWithDeadline); ok {
if deadlineExceeded := deadlineMsg.DeadlineExceeded(ctx.BlockTime()); deadlineExceeded {
return nil, sdkerrors.Wrapf(types.ErrDeadlineExceeded, "block time %d >= deadline %d", ctx.BlockTime().Unix(), deadlineMsg.GetDeadline().Unix())
}
}
switch msg := msg.(type) {
case types.MsgDeposit:
return handleMsgDeposit(ctx, k, msg)
case types.MsgWithdraw:
return handleMsgWithdraw(ctx, k, msg)
case types.MsgSwapExactForTokens:
return handleMsgSwapExactForTokens(ctx, k, msg)
case types.MsgSwapForExactTokens:
return handleMsgSwapForExactTokens(ctx, k, msg)
default:
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
}
}
}
func handleMsgDeposit(ctx sdk.Context, k keeper.Keeper, msg types.MsgDeposit) (*sdk.Result, error) {
if err := k.Deposit(ctx, msg.Depositor, msg.TokenA, msg.TokenB, msg.Slippage); err != nil {
return nil, err
}
return resultWithMsgSender(ctx, msg.Depositor), nil
}
func handleMsgWithdraw(ctx sdk.Context, k keeper.Keeper, msg types.MsgWithdraw) (*sdk.Result, error) {
if err := k.Withdraw(ctx, msg.From, msg.Shares, msg.MinTokenA, msg.MinTokenB); err != nil {
return nil, err
}
return resultWithMsgSender(ctx, msg.From), nil
}
func handleMsgSwapExactForTokens(ctx sdk.Context, k keeper.Keeper, msg types.MsgSwapExactForTokens) (*sdk.Result, error) {
if err := k.SwapExactForTokens(ctx, msg.Requester, msg.ExactTokenA, msg.TokenB, msg.Slippage); err != nil {
return nil, err
}
return resultWithMsgSender(ctx, msg.Requester), nil
}
func handleMsgSwapForExactTokens(ctx sdk.Context, k keeper.Keeper, msg types.MsgSwapForExactTokens) (*sdk.Result, error) {
if err := k.SwapForExactTokens(ctx, msg.Requester, msg.TokenA, msg.ExactTokenB, msg.Slippage); err != nil {
return nil, err
}
return resultWithMsgSender(ctx, msg.Requester), nil
}
func resultWithMsgSender(ctx sdk.Context, sender sdk.AccAddress) *sdk.Result {
ctx.EventManager().EmitEvent(
sdk.NewEvent(
sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, sender.String()),
),
)
return &sdk.Result{
Events: ctx.EventManager().Events(),
}
}