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fix slippage

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This commit is contained in:
thloyi
2026-04-20 12:31:30 +08:00
parent 1dd843c393
commit fe94888b14
6 changed files with 116 additions and 36 deletions
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56
swap_amounts_test.go
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@@ -79,6 +79,38 @@ func TestSetSwapAmountInfoExactInZeroLimitUsesMaxSlippage(t *testing.T) {
}
}
func TestSetSwapAmountInfoExactInNegativeHeadroomClampsToZero(t *testing.T) {
swap := Swap{
Event: TxEventBuy,
BaseMint: solana.MustPublicKeyFromBase58("11111111111111111111111111111111"),
QuoteMint: solana.MustPublicKeyFromBase58("So11111111111111111111111111111111111111112"),
BaseAmount: decimal.NewFromInt(90),
QuoteAmount: decimal.NewFromInt(100),
}
swap.SetSwapAmountInfo(SwapModeExactIn, decimal.NewFromInt(100), decimal.NewFromInt(110))
if got := swap.SlippageBps.String(); got != "0" {
t.Fatalf("slippage bps = %s, want 0", got)
}
}
func TestSetSwapAmountInfoExactOutNegativeHeadroomClampsToZero(t *testing.T) {
swap := Swap{
Event: TxEventSell,
BaseMint: solana.MustPublicKeyFromBase58("11111111111111111111111111111111"),
QuoteMint: solana.MustPublicKeyFromBase58("So11111111111111111111111111111111111111112"),
BaseAmount: decimal.NewFromInt(120),
QuoteAmount: decimal.NewFromInt(100),
}
swap.SetSwapAmountInfo(SwapModeExactOut, decimal.NewFromInt(100), decimal.NewFromInt(105))
if got := swap.SlippageBps.String(); got != "0" {
t.Fatalf("slippage bps = %s, want 0", got)
}
}
func TestMeteoraDammSwapAmountInfo(t *testing.T) {
tests := []struct {
name string
@@ -116,6 +148,18 @@ func TestMeteoraDammSwapAmountInfo(t *testing.T) {
wantFixed: 101,
wantLimit: 96,
},
{
name: "buy exact in keeps amount0 as input and amount1 as min out",
event: TxEventBuy,
params: &struct {
Amount0 uint64
Amount1 uint64
SwapMode uint8
}{Amount0: 130, Amount1: 120, SwapMode: 0},
wantMode: SwapModeExactIn,
wantFixed: 130,
wantLimit: 120,
},
{
name: "buy exact out uses amount0 as target output and amount1 as max input",
event: TxEventBuy,
@@ -128,6 +172,18 @@ func TestMeteoraDammSwapAmountInfo(t *testing.T) {
wantFixed: 120,
wantLimit: 130,
},
{
name: "sell exact out keeps amount0 as target output and amount1 as max input",
event: TxEventSell,
params: &struct {
Amount0 uint64
Amount1 uint64
SwapMode uint8
}{Amount0: 140, Amount1: 150, SwapMode: 2},
wantMode: SwapModeExactOut,
wantFixed: 140,
wantLimit: 150,
},
}
for _, tt := range tests {