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refactor: implement getMintsToProofs function

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This commit is contained in:
P. Reis 2025-02-18 22:19:41 -03:00
parent 8890311e2d
commit a2165f0918
1 changed files with 78 additions and 51 deletions
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129
packages/ditto/middleware/swapNutzapsMiddleware.ts
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@ -93,56 +93,7 @@ export const swapNutzapsMiddleware: MiddlewareHandler<
nutzapsFilter.since = lastRedeemedNutzap.created_at;
}
const mintsToProofs: { [key: string]: { proofs: Proof[]; redeemed: string[][] } } = {}; // 'key' is the mint url
const nutzaps = await store.query([nutzapsFilter], { signal });
for (const event of nutzaps) {
try {
const mint = event.tags.find(([name]) => name === 'u')?.[1];
if (!mint) {
continue;
}
const proof = event.tags.find(([name]) => name === 'proof')?.[1];
if (!proof) {
continue;
}
if (!mintsToProofs[mint]) {
mintsToProofs[mint] = { proofs: [], redeemed: [] };
}
const parsed = n.json().pipe(
z.object({
id: z.string(),
amount: z.number(),
secret: z.string(),
C: z.string(),
dleq: z.object({ s: z.string(), e: z.string(), r: z.string().optional() }).optional(),
dleqValid: z.boolean().optional(),
}).array(),
).safeParse(proof);
if (!parsed.success) {
continue;
}
mintsToProofs[mint].proofs = [...mintsToProofs[mint].proofs, ...parsed.data];
mintsToProofs[mint].redeemed = [
...mintsToProofs[mint].redeemed,
[
'e', // nutzap event that has been redeemed
event.id,
conf.relay,
'redeemed',
],
['p', event.pubkey], // pubkey of the author of the 9321 event (nutzap sender)
];
} catch (e) {
logi({ level: 'error', ns: 'ditto.api.cashu.wallet.swap', error: errorJson(e) });
}
}
const mintsToProofs = await getMintsToProofs(store, nutzapsFilter, conf.relay, { signal });
// TODO: throw error if mintsToProofs is an empty object?
for (const mint of Object.keys(mintsToProofs)) {
@ -204,4 +155,80 @@ async function getLastRedeemedNutzap(
}
}
}
async function getMintsToProofs() {}
/**
* Gets proofs from nutzaps that have not been redeemed yet.
* Each proof is associated with a specific mint.
* @param store Store used to query for the nutzaps
* @param nutzapsFilter Filter used to query for the nutzaps, most useful when
* it contains a 'since' field so it saves time and resources
* @param relay Relay hint where the new kind 7376 will be saved
* @returns MintsToProofs An object where each key is a mint url and the values are an array of proofs
* and an array of redeemed tags in this format:
* ```
* [
* ...,
* [ "e", "<9321-event-id>", "<relay-hint>", "redeemed" ], // nutzap event that has been redeemed
* [ "p", "<sender-pubkey>" ] // pubkey of the author of the 9321 event (nutzap sender)
* ]
* ```
*/
async function getMintsToProofs(
store: NStore,
nutzapsFilter: NostrFilter,
relay: string,
opts?: { signal?: AbortSignal },
): Promise<{ [key: string]: { proofs: Proof[]; redeemed: string[][] } }> {
const mintsToProofs: { [key: string]: { proofs: Proof[]; redeemed: string[][] } } = {};
const nutzaps = await store.query([nutzapsFilter], { signal: opts?.signal });
for (const event of nutzaps) {
try {
const mint = event.tags.find(([name]) => name === 'u')?.[1];
if (!mint) {
continue;
}
const proof = event.tags.find(([name]) => name === 'proof')?.[1];
if (!proof) {
continue;
}
if (!mintsToProofs[mint]) {
mintsToProofs[mint] = { proofs: [], redeemed: [] };
}
const parsed = n.json().pipe(
z.object({
id: z.string(),
amount: z.number(),
secret: z.string(),
C: z.string(),
dleq: z.object({ s: z.string(), e: z.string(), r: z.string().optional() }).optional(),
dleqValid: z.boolean().optional(),
}).array(),
).safeParse(proof);
if (!parsed.success) {
continue;
}
mintsToProofs[mint].proofs = [...mintsToProofs[mint].proofs, ...parsed.data];
mintsToProofs[mint].redeemed = [
...mintsToProofs[mint].redeemed,
[
'e', // nutzap event that has been redeemed
event.id,
relay,
'redeemed',
],
['p', event.pubkey], // pubkey of the author of the 9321 event (nutzap sender)
];
} catch (e) {
logi({ level: 'error', ns: 'ditto.api.cashu.wallet.swap', error: errorJson(e) });
}
}
return mintsToProofs;
}