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38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
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package migration5
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import (
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"encoding/binary"
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"fmt"
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)
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// TowerID is a unique 64-bit identifier allocated to each unique watchtower.
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// This allows the client to conserve on-disk space by not needing to always
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// reference towers by their pubkey.
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type TowerID uint64
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// TowerIDFromBytes constructs a TowerID from the provided byte slice. The
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// argument must have at least 8 bytes, and should contain the TowerID in
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// big-endian byte order.
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func TowerIDFromBytes(towerIDBytes []byte) (TowerID, error) {
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if len(towerIDBytes) != 8 {
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return 0, fmt.Errorf("not enough bytes in tower ID. "+
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"Expected 8, got: %d", len(towerIDBytes))
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}
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return TowerID(byteOrder.Uint64(towerIDBytes)), nil
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}
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// Bytes encodes a TowerID into an 8-byte slice in big-endian byte order.
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func (id TowerID) Bytes() []byte {
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var buf [8]byte
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binary.BigEndian.PutUint64(buf[:], uint64(id))
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return buf[:]
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}
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// SessionIDSize is 33-bytes; it is a serialized, compressed public key.
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const SessionIDSize = 33
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// SessionID is created from the remote public key of a client, and serves as a
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// unique identifier and authentication for sending state updates.
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type SessionID [SessionIDSize]byte
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