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cleaning up marshaling/serialization (#1)

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* cleaning up marshaling/serialization

* cleaning up marshaling/serialization
This commit is contained in:
barkyq
2023-01-18 11:06:59 -05:00
committed by GitHub
parent c816103774
commit b9d04f1496
5 changed files with 129 additions and 100 deletions
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70
event.go
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@ -4,10 +4,9 @@ import (
"crypto/sha256"
"encoding/hex"
"fmt"
"time"
"github.com/btcsuite/btcd/btcec/v2"
"github.com/btcsuite/btcd/btcec/v2/schnorr"
"time"
)
type Event struct {
@ -45,79 +44,32 @@ func (evt *Event) GetID() string {
return hex.EncodeToString(h[:])
}
// Escaping strings for JSON encoding according to RFC4627.
// Also encloses result in quotation marks "".
func quoteEscapeString(dst []byte, s string) []byte {
dst = append(dst, '"')
for i := 0; i < len(s); i++ {
c := s[i]
switch {
case c == '"':
// quotation mark
dst = append(dst, []byte{'\\', '"'}...)
case c == '\\':
// reverse solidus
dst = append(dst, []byte{'\\', '\\'}...)
case c >= 0x20:
// default, rest below are control chars
dst = append(dst, c)
case c < 0x09:
dst = append(dst, []byte{'\\', 'u', '0', '0', '0', '0' + c}...)
case c == 0x09:
dst = append(dst, []byte{'\\', 't'}...)
case c == 0x0a:
dst = append(dst, []byte{'\\', 'n'}...)
case c == 0x0d:
dst = append(dst, []byte{'\\', 'r'}...)
case c < 0x10:
dst = append(dst, []byte{'\\', 'u', '0', '0', '0', 0x57 + c}...)
case c < 0x1a:
dst = append(dst, []byte{'\\', 'u', '0', '0', '1', 0x20 + c}...)
case c < 0x20:
dst = append(dst, []byte{'\\', 'u', '0', '0', '1', 0x47 + c}...)
}
}
dst = append(dst, '"')
return dst
}
// Serialize outputs a byte array that can be hashed/signed to identify/authenticate.
// JSON encoding as defined in RFC4627.
func (evt *Event) Serialize() []byte {
// the serialization process is just putting everything into a JSON array
// so the order is kept. See NIP-01
ser := make([]byte, 0)
dst := make([]byte, 0)
// the header portion is easy to serialize
// [0,"pubkey",created_at,kind,[
ser = append(ser, []byte(
dst = append(dst, []byte(
fmt.Sprintf(
"[0,\"%s\",%d,%d,[",
"[0,\"%s\",%d,%d,",
evt.PubKey,
evt.CreatedAt.Unix(),
evt.Kind,
))...)
// tags need to be escaped in general.
for i, tag := range evt.Tags {
if i > 0 {
ser = append(ser, ',')
}
ser = append(ser, '[')
for i, s := range tag {
if i > 0 {
ser = append(ser, ',')
}
ser = quoteEscapeString(ser, s)
}
ser = append(ser, ']')
}
ser = append(ser, []byte{']', ','}...)
// tags
dst = evt.Tags.marshalTo(dst)
dst = append(dst, ',')
// content needs to be escaped in general as it is user generated.
ser = quoteEscapeString(ser, evt.Content)
ser = append(ser, ']')
dst = escapeString(dst, evt.Content)
dst = append(dst, ']')
return ser
return dst
}
// CheckSignature checks if the signature is valid for the id