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metadata.go
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metadata.go
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package legacy_multisig
import (
"encoding/binary"
)
// Legacy metadata
const (
MERKLE_ROOT_OFFSET = 0
MERKLE_INDEX_OFFSET = 32
ORIGIN_MAILBOX_OFFSET = 36
MERKLE_PROOF_OFFSET = 68
THRESHOLD_OFFSET = 1092
SIGNATURES_OFFSET = 1093
SIGNATURE_LENGTH = 65
)
func Root(metadata []byte) []byte {
return metadata[MERKLE_ROOT_OFFSET:MERKLE_INDEX_OFFSET]
}
func Index(metadata []byte) uint32 {
return binary.BigEndian.Uint32(metadata[MERKLE_INDEX_OFFSET:ORIGIN_MAILBOX_OFFSET])
}
func OriginMailbox(metadata []byte) []byte {
return metadata[ORIGIN_MAILBOX_OFFSET:MERKLE_PROOF_OFFSET]
}
func Proof(metadata []byte) []byte {
return metadata[MERKLE_PROOF_OFFSET:THRESHOLD_OFFSET]
}
func Threshold(metadata []byte) uint8 {
return metadata[THRESHOLD_OFFSET:SIGNATURES_OFFSET][0]
}
func SignatureAt(metadata []byte, index uint32) []byte {
start := SIGNATURES_OFFSET + (index * SIGNATURE_LENGTH)
end := start + SIGNATURE_LENGTH
signature := metadata[start:end]
if signature[64] >= 4 {
signature[64] = signature[64] - 27
}
return signature
}