Add Zkool ZAP1 memo plugin

plugins/zkool/README.md

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+# Zkool ZAP1 Memo Plugin
+
+Zkool supports memo plugins through its Plugin Manager. This package renders
+ZAP1 structured memo strings such as:
+
+```text
+ZAP1:01:075b00df286038a7b3f6bb70054df61343e3481fba579591354a00214e9e019b
+```
+
+It matches the `ZAP1` prefix, labels known type bytes, keeps the raw hash
+visible, and links non-root entries to the ZAP1 proof endpoint.
+
+Install URL after this lands on `main`:
+
+```text
+https://github.com/Frontier-Compute/zap1/raw/main/plugins/zkool/zap1-memo-plugin.zip
+```
+
+Source files are under `plugins/zkool/zap1-memo-plugin/`. The zip is flat
+because Zkool expects `manifest.json` and `main.rhai` at archive root.

plugins/zkool/zap1-memo-plugin/main.rhai

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+fn get_prefixes() {
+    return ["5a415031"];
+}
+
+fn hex_char(byte) {
+    if byte == 48 { return "0"; }
+    if byte == 49 { return "1"; }
+    if byte == 50 { return "2"; }
+    if byte == 51 { return "3"; }
+    if byte == 52 { return "4"; }
+    if byte == 53 { return "5"; }
+    if byte == 54 { return "6"; }
+    if byte == 55 { return "7"; }
+    if byte == 56 { return "8"; }
+    if byte == 57 { return "9"; }
+    if byte == 65 || byte == 97 { return "a"; }
+    if byte == 66 || byte == 98 { return "b"; }
+    if byte == 67 || byte == 99 { return "c"; }
+    if byte == 68 || byte == 100 { return "d"; }
+    if byte == 69 || byte == 101 { return "e"; }
+    if byte == 70 || byte == 102 { return "f"; }
+    return "?";
+}
+
+fn type_label(type_hex) {
+    if type_hex == "01" { return "PROGRAM_ENTRY"; }
+    if type_hex == "02" { return "OWNERSHIP_ATTEST"; }
+    if type_hex == "03" { return "CONTRACT_ANCHOR"; }
+    if type_hex == "04" { return "DEPLOYMENT"; }
+    if type_hex == "05" { return "HOSTING_PAYMENT"; }
+    if type_hex == "06" { return "SHIELD_RENEWAL"; }
+    if type_hex == "07" { return "TRANSFER"; }
+    if type_hex == "08" { return "EXIT"; }
+    if type_hex == "09" { return "MERKLE_ROOT"; }
+    if type_hex == "0a" { return "STAKING_DEPOSIT"; }
+    if type_hex == "0b" { return "STAKING_WITHDRAW"; }
+    if type_hex == "0c" { return "STAKING_REWARD"; }
+    if type_hex == "0d" { return "GOVERNANCE_PROPOSAL"; }
+    if type_hex == "0e" { return "GOVERNANCE_VOTE"; }
+    if type_hex == "0f" { return "GOVERNANCE_RESULT"; }
+    return "UNKNOWN";
+}
+
+fn process_memo() {
+    let type_hex = hex_char(memo::read_u8(5)) + hex_char(memo::read_u8(6));
+    let hash = memo::read_string(8, 64);
+    let label = type_label(type_hex);
+    let headers = ["Field", "Value"];
+    let rows = [
+        [cell_string("Protocol"), cell_string("ZAP1")],
+        [cell_string("Type"), cell_string(type_hex)],
+        [cell_string("Label"), cell_string(label)],
+        [cell_string("Hash"), cell_string(hash)],
+    ];
+
+    if type_hex != "09" {
+        let url = "https://api.frontiercompute.cash/verify/" + hash;
+        url += "/proof.json";
+        rows.push([cell_string("Proof"), cell_url(url)]);
+    }
+
+    return [section("ZAP1 Memo", headers, rows)];
+}

plugins/zkool/zap1-memo-plugin/manifest.json

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+{
+    "id": "cash.frontiercompute.zap1-memo",
+    "name": "ZAP1 Memo Parser",
+    "version": "1.0.0",
+    "author": "Frontier Compute",
+    "description": "Parses ZAP1 structured attestation memos.",
+    "min_app_version": "6.20.0",
+    "types": ["memo"],
+    "entry_point": "main.rhai"
+}