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e772f8ccfa
Carry the accepted quote into each request, persist it, and reject invoices above that limit. Preserve compatibility for requests that omit the cap while distinguishing an explicit zero.
32 lines
1 KiB
Go
32 lines
1 KiB
Go
package looprpc
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import (
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"testing"
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"google.golang.org/protobuf/proto"
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)
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// TestInstantOutMaxSwapFeePresence verifies that an omitted fee cap remains
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// distinguishable from an explicitly encoded zero while retaining the scalar
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// field's original wire representation.
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func TestInstantOutMaxSwapFeePresence(t *testing.T) {
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request := &InstantOutRequest{}
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if err := proto.Unmarshal(nil, request); err != nil {
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t.Fatalf("unable to unmarshal omitted cap: %v", err)
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}
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if request.GetMaxSwapFee() != nil {
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t.Fatal("omitted cap unexpectedly has presence")
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}
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// Field four, encoded as a varint with value zero. This is the same wire
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// representation used before the field gained presence semantics.
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if err := proto.Unmarshal([]byte{0x20, 0x00}, request); err != nil {
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t.Fatalf("unable to unmarshal explicit zero cap: %v", err)
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}
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if request.GetMaxSwapFee() == nil {
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t.Fatal("explicit zero cap lost presence")
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}
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if request.GetMaxSwapFeeSat() != 0 {
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t.Fatalf("expected zero cap, got %d", request.GetMaxSwapFeeSat())
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}
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}
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