Rename files

2023-06-21 17:56:43 +01:00
parent 7ec602cc16
commit a61e17c93b
11 changed files with 5 additions and 5 deletions
--- a/packages/system/src/zaps.ts
+++ b/packages/system/src/zaps.ts
@ -0,0 +1,92 @@
+import { FeedCache } from "@snort/shared";
+import { sha256, decodeInvoice, InvoiceDetails } from "@snort/shared";
+import { HexKey, NostrEvent } from "./nostr";
+import { findTag } from "./utils";
+import { MetadataCache } from "./cache";
+
+function getInvoice(zap: NostrEvent): InvoiceDetails | undefined {
+    const bolt11 = findTag(zap, "bolt11");
+    if (!bolt11) {
+        throw new Error("Invalid zap, missing bolt11 tag");
+    }
+    return decodeInvoice(bolt11);
+}
+
+export function parseZap(zapReceipt: NostrEvent, userCache: FeedCache<MetadataCache>, refNote?: NostrEvent): ParsedZap {
+    let innerZapJson = findTag(zapReceipt, "description");
+    if (innerZapJson) {
+        try {
+            const invoice = getInvoice(zapReceipt);
+            if (innerZapJson.startsWith("%")) {
+                innerZapJson = decodeURIComponent(innerZapJson);
+            }
+            const zapRequest: NostrEvent = JSON.parse(innerZapJson);
+            if (Array.isArray(zapRequest)) {
+                // old format, ignored
+                throw new Error("deprecated zap format");
+            }
+            const isForwardedZap = refNote?.tags.some(a => a[0] === "zap") ?? false;
+            const anonZap = zapRequest.tags.find(a => a[0] === "anon");
+            const metaHash = sha256(innerZapJson);
+            const pollOpt = zapRequest.tags.find(a => a[0] === "poll_option")?.[1];
+            const ret: ParsedZap = {
+                id: zapReceipt.id,
+                zapService: zapReceipt.pubkey,
+                amount: (invoice?.amount ?? 0) / 1000,
+                event: findTag(zapRequest, "e"),
+                sender: zapRequest.pubkey,
+                receiver: findTag(zapRequest, "p"),
+                valid: true,
+                anonZap: anonZap !== undefined,
+                content: zapRequest.content,
+                errors: [],
+                pollOption: pollOpt ? Number(pollOpt) : undefined,
+            };
+            if (invoice?.descriptionHash !== metaHash) {
+                ret.valid = false;
+                ret.errors.push("description_hash does not match zap request");
+            }
+            if (findTag(zapRequest, "p") !== findTag(zapReceipt, "p")) {
+                ret.valid = false;
+                ret.errors.push("p tags dont match");
+            }
+            if (ret.event && ret.event !== findTag(zapReceipt, "e")) {
+                ret.valid = false;
+                ret.errors.push("e tags dont match");
+            }
+            if (findTag(zapRequest, "amount") === invoice?.amount) {
+                ret.valid = false;
+                ret.errors.push("amount tag does not match invoice amount");
+            }
+            if (userCache.getFromCache(ret.receiver)?.zapService !== ret.zapService && !isForwardedZap) {
+                ret.valid = false;
+                ret.errors.push("zap service pubkey doesn't match");
+            }
+            return ret;
+        } catch (e) {
+            // ignored: console.debug("Invalid zap", zapReceipt, e);
+        }
+    }
+    return {
+        id: zapReceipt.id,
+        zapService: zapReceipt.pubkey,
+        amount: 0,
+        valid: false,
+        anonZap: false,
+        errors: ["invalid zap, parsing failed"],
+    };
+}
+
+export interface ParsedZap {
+    id: HexKey;
+    event?: HexKey;
+    receiver?: HexKey;
+    amount: number;
+    content?: string;
+    sender?: HexKey;
+    valid: boolean;
+    zapService: HexKey;
+    anonZap: boolean;
+    errors: Array<string>;
+    pollOption?: number;
+}