106 lines
2.1 KiB
Go
106 lines
2.1 KiB
Go
package event
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import (
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"io"
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"realy.lol/chk"
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"realy.lol/ec/schnorr"
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"realy.lol/kind"
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"realy.lol/tag"
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"realy.lol/tags"
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"realy.lol/timestamp"
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"realy.lol/varint"
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)
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// MarshalBinary writes a binary encoding of an event.
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//
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// [ 32 bytes Id ]
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// [ 32 bytes Pubkey ]
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// [ varint CreatedAt ]
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// [ 2 bytes Kind ]
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// [ varint Tags length ]
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//
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// [ varint tag length ]
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// [ varint tag element length ]
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// [ tag element data ]
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// ...
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//
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// [ varint Content length ]
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// [ 64 bytes Sig ]
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func (ev *T) MarshalBinary(w io.Writer) {
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_, _ = w.Write(ev.Id)
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_, _ = w.Write(ev.Pubkey)
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varint.Encode(w, uint64(ev.CreatedAt.V))
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varint.Encode(w, uint64(ev.Kind.K))
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varint.Encode(w, uint64(ev.Tags.Len()))
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for _, x := range ev.Tags.ToSliceOfTags() {
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varint.Encode(w, uint64(x.Len()))
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for _, y := range x.ToSliceOfBytes() {
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varint.Encode(w, uint64(len(y)))
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_, _ = w.Write(y)
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}
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}
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varint.Encode(w, uint64(len(ev.Content)))
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_, _ = w.Write(ev.Content)
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_, _ = w.Write(ev.Sig)
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return
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}
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func (ev *T) UnmarshalBinary(r io.Reader) (err error) {
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ev.Id = make([]byte, 32)
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if _, err = r.Read(ev.Id); chk.E(err) {
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return
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}
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ev.Pubkey = make([]byte, 32)
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if _, err = r.Read(ev.Pubkey); chk.E(err) {
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return
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}
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var ca uint64
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if ca, err = varint.Decode(r); chk.E(err) {
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return
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}
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ev.CreatedAt = timestamp.New(ca)
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var k uint64
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if k, err = varint.Decode(r); chk.E(err) {
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return
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}
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ev.Kind = kind.New(k)
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var nTags uint64
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if nTags, err = varint.Decode(r); chk.E(err) {
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return
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}
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ev.Tags = tags.NewWithCap(nTags)
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for range nTags {
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var nField uint64
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if nField, err = varint.Decode(r); chk.E(err) {
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return
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}
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t := tag.NewWithCap(nField)
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for range nField {
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var lenField uint64
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if lenField, err = varint.Decode(r); chk.E(err) {
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return
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}
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field := make([]byte, lenField)
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if _, err = r.Read(field); chk.E(err) {
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return
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}
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t = t.Append(field)
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}
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ev.Tags.AppendTags(t)
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}
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var cLen uint64
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if cLen, err = varint.Decode(r); chk.E(err) {
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return
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}
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ev.Content = make([]byte, cLen)
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if _, err = r.Read(ev.Content); chk.E(err) {
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return
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}
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ev.Sig = make([]byte, schnorr.SignatureSize)
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if _, err = r.Read(ev.Sig); chk.E(err) {
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return
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}
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return
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}
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