ziggie
fb705bb0f9
Copy the core payments/db code into payments/db/migration1 and add the required sqlc-generated types/queries from sqldb/sqlc. This effectively freezes the migration code so it stays robust against future query or schema changes in the main payments package. Replace the delegation to channeldb.ReadElement/WriteElement with self-contained, frozen implementations that only handle the exact types required by this migration package. This removes the dependency on the live channeldb codec so that future changes to channeldb serialization cannot silently corrupt or break the migration. UnknownElementType is also defined locally for the same reason.
76 lines
3.1 KiB
Go
76 lines
3.1 KiB
Go
package migration1
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const (
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// DefaultMaxPayments is the default maximum number of payments returned
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// in the payments query pagination.
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DefaultMaxPayments = 100
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)
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// Query represents a query to the payments database starting or ending
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// at a certain offset index. The number of retrieved records can be limited.
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type Query struct {
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// IndexOffset determines the starting point of the payments query and
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// is always exclusive. In normal order, the query starts at the next
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// higher (available) index compared to IndexOffset. In reversed order,
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// the query ends at the next lower (available) index compared to the
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// IndexOffset. In the case of a zero index_offset, the query will start
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// with the oldest payment when paginating forwards, or will end with
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// the most recent payment when paginating backwards.
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IndexOffset uint64
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// MaxPayments is the maximal number of payments returned in the
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// payments query.
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MaxPayments uint64
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// Reversed gives a meaning to the IndexOffset. If reversed is set to
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// true, the query will fetch payments with indices lower than the
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// IndexOffset, otherwise, it will return payments with indices greater
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// than the IndexOffset.
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Reversed bool
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// If IncludeIncomplete is true, then return payments that have not yet
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// fully completed. This means that pending payments, as well as failed
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// payments will show up if this field is set to true.
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IncludeIncomplete bool
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// CountTotal indicates that all payments currently present in the
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// payment index (complete and incomplete) should be counted.
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CountTotal bool
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// CreationDateStart, expressed in Unix seconds, if set, filters out
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// all payments with a creation date greater than or equal to it.
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CreationDateStart int64
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// CreationDateEnd, expressed in Unix seconds, if set, filters out all
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// payments with a creation date less than or equal to it.
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CreationDateEnd int64
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}
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// Response contains the result of a query to the payments database.
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// It includes the set of payments that match the query and integers which
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// represent the index of the first and last item returned in the series of
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// payments. These integers allow callers to resume their query in the event
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// that the query's response exceeds the max number of returnable events.
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type Response struct {
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// Payments is the set of payments returned from the database for the
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// Query.
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Payments []*MPPayment
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// FirstIndexOffset is the index of the first element in the set of
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// returned MPPayments. Callers can use this to resume their query
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// in the event that the slice has too many events to fit into a single
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// response. The offset can be used to continue reverse pagination.
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FirstIndexOffset uint64
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// LastIndexOffset is the index of the last element in the set of
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// returned MPPayments. Callers can use this to resume their query
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// in the event that the slice has too many events to fit into a single
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// response. The offset can be used to continue forward pagination.
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LastIndexOffset uint64
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// TotalCount represents the total number of payments that are currently
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// stored in the payment database. This will only be set if the
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// CountTotal field in the query was set to true.
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TotalCount uint64
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}
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