mirror of
https://github.com/0glabs/0g-chain.git
synced 2024-12-26 08:15:19 +00:00
20437a91fb
* add message types for swaps * add tx client commands * add test coverage for swap message deadlines * start handler swap tests, export handler result message event into private method, add stubbed keeper methods * add initial swap implementation to get handler tests passing; adds event specific for trades * add handler acceptance test for slippage in exact input and exact output swaps * implement slippage limit for swap keeper methods * add tests to ensure a user can only swap spendable coins * test pool not found, panic on invalid pool, and panic when module account does not have enough funds * validate that the exact output when using for exact swaps is less than the pool liquidity * nit: long line * add validation that swap output is greater than zero * add rest txs for swap messages * nit: lints * dry up swap keeper methods * from pr feedback - spelling and increase clairty around the output amount of a swap rounding to zero
82 lines
2.7 KiB
Go
82 lines
2.7 KiB
Go
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(),
|
|
}
|
|
}
|