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channeldb: index payments by sequence number

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Add an entry to a payments index bucket which maps sequence number
to payment hash when we initiate payments. This allows for more
efficient paginated queries. We create the top level bucket in its
own migration so that we do not need to create it on the fly.

When we retry payments and provide them with a new sequence number, we
delete the index for their existing payment so that we do not have an
index that points to a non-existent payment.

If we delete a payment, we also delete its index entry. This prevents
us from looking up entries from indexes to payments that do not exist.
This commit is contained in:
carla
2020-06-10 12:34:27 +02:00
parent 6c4a1f4f99
commit c8d11285f3
10 changed files with 647 additions and 11 deletions
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10
channeldb/codec.go
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@@ -192,6 +192,11 @@ func WriteElement(w io.Writer, element interface{}) error {
return err
}
case paymentIndexType:
if err := binary.Write(w, byteOrder, e); err != nil {
return err
}
case lnwire.FundingFlag:
if err := binary.Write(w, byteOrder, e); err != nil {
return err
@@ -406,6 +411,11 @@ func ReadElement(r io.Reader, element interface{}) error {
return err
}
case *paymentIndexType:
if err := binary.Read(r, byteOrder, e); err != nil {
return err
}
case *lnwire.FundingFlag:
if err := binary.Read(r, byteOrder, e); err != nil {
return err