mirror of
https://github.com/0glabs/0g-chain.git
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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
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import (
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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"github.com/kava-labs/kava/x/swap/keeper"
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"github.com/kava-labs/kava/x/swap/types"
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)
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// NewHandler creates an sdk.Handler for swap messages
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func NewHandler(k Keeper) sdk.Handler {
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return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
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ctx = ctx.WithEventManager(sdk.NewEventManager())
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if deadlineMsg, ok := msg.(types.MsgWithDeadline); ok {
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if deadlineExceeded := deadlineMsg.DeadlineExceeded(ctx.BlockTime()); deadlineExceeded {
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return nil, sdkerrors.Wrapf(types.ErrDeadlineExceeded, "block time %d >= deadline %d", ctx.BlockTime().Unix(), deadlineMsg.GetDeadline().Unix())
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}
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}
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switch msg := msg.(type) {
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case types.MsgDeposit:
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return handleMsgDeposit(ctx, k, msg)
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case types.MsgWithdraw:
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return handleMsgWithdraw(ctx, k, msg)
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case types.MsgSwapExactForTokens:
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return handleMsgSwapExactForTokens(ctx, k, msg)
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case types.MsgSwapForExactTokens:
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return handleMsgSwapForExactTokens(ctx, k, msg)
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default:
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return nil, sdkerrors.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized %s message type: %T", ModuleName, msg)
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}
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}
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}
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func handleMsgDeposit(ctx sdk.Context, k keeper.Keeper, msg types.MsgDeposit) (*sdk.Result, error) {
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if err := k.Deposit(ctx, msg.Depositor, msg.TokenA, msg.TokenB, msg.Slippage); err != nil {
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return nil, err
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}
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return resultWithMsgSender(ctx, msg.Depositor), nil
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}
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func handleMsgWithdraw(ctx sdk.Context, k keeper.Keeper, msg types.MsgWithdraw) (*sdk.Result, error) {
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if err := k.Withdraw(ctx, msg.From, msg.Shares, msg.MinTokenA, msg.MinTokenB); err != nil {
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return nil, err
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}
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return resultWithMsgSender(ctx, msg.From), nil
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}
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func handleMsgSwapExactForTokens(ctx sdk.Context, k keeper.Keeper, msg types.MsgSwapExactForTokens) (*sdk.Result, error) {
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if err := k.SwapExactForTokens(ctx, msg.Requester, msg.ExactTokenA, msg.TokenB, msg.Slippage); err != nil {
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return nil, err
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}
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return resultWithMsgSender(ctx, msg.Requester), nil
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}
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func handleMsgSwapForExactTokens(ctx sdk.Context, k keeper.Keeper, msg types.MsgSwapForExactTokens) (*sdk.Result, error) {
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if err := k.SwapForExactTokens(ctx, msg.Requester, msg.TokenA, msg.ExactTokenB, msg.Slippage); err != nil {
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return nil, err
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}
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return resultWithMsgSender(ctx, msg.Requester), nil
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}
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func resultWithMsgSender(ctx sdk.Context, sender sdk.AccAddress) *sdk.Result {
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ctx.EventManager().EmitEvent(
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sdk.NewEvent(
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sdk.EventTypeMessage,
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sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
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sdk.NewAttribute(sdk.AttributeKeySender, sender.String()),
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),
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)
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return &sdk.Result{
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Events: ctx.EventManager().Events(),
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}
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}
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