seal.gno

 1package memba_notes_v1
 2
 3import (
 4	"crypto/sha256"
 5	"encoding/hex"
 6	"strconv"
 7)
 8
 9// Decorative fingerprint from public ciphertext only. It is not a historical
10// inclusion proof or proof of knowledge of a plaintext/key.
11func seal(body []byte) string {
12	hash := sha256.Sum256(body)
13	glyphs := []rune("◇◆○●□■△▲✦")
14	out := "```\n"
15	for i := 0; i < 81; i++ {
16		out += string(glyphs[int(hash[i%32]+byte(i/32))%len(glyphs)])
17		if i%9 == 8 {
18			out += "\n"
19		}
20	}
21	return out + "```\n"
22}
23func SealJSON(idHex string) string {
24	n := find(readID(idHex))
25	hash := sha256.Sum256(n.Body)
26	return `{"id":` + q(idText(n.ID)) + `,"state_revision":` + u(n.Revision) + `,"body_revision":` + u(n.BodyRevision) + `,"epoch":` + u(uint64(n.Epoch)) + `,"ciphertext_sha256":` + q(hex.EncodeToString(hash[:])) + `,"encrypted":` + strconv.FormatBool(encrypted(n.Mode) && !n.Deleted) + `,"deleted":` + strconv.FormatBool(n.Deleted) + `,"height":` + q(strconv.FormatInt(n.Last.Height, 10)) + `,"historical_proof":false}`
27}