53 lines
1.2 KiB
JavaScript
53 lines
1.2 KiB
JavaScript
// nip13.ts
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import { bytesToHex as bytesToHex2 } from "@noble/hashes/utils";
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import { sha256 } from "@noble/hashes/sha256";
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// utils.ts
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import { bytesToHex, hexToBytes } from "@noble/hashes/utils";
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var utf8Decoder = new TextDecoder("utf-8");
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var utf8Encoder = new TextEncoder();
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// nip13.ts
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function getPow(hex) {
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let count = 0;
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for (let i = 0; i < 64; i += 8) {
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const nibble = parseInt(hex.substring(i, i + 8), 16);
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if (nibble === 0) {
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count += 32;
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} else {
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count += Math.clz32(nibble);
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break;
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}
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}
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return count;
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}
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function minePow(unsigned, difficulty) {
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let count = 0;
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const event = unsigned;
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const tag = ["nonce", count.toString(), difficulty.toString()];
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event.tags.push(tag);
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while (true) {
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const now = Math.floor(new Date().getTime() / 1e3);
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if (now !== event.created_at) {
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count = 0;
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event.created_at = now;
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}
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tag[1] = (++count).toString();
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event.id = fastEventHash(event);
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if (getPow(event.id) >= difficulty) {
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break;
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}
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}
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return event;
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}
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function fastEventHash(evt) {
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return bytesToHex2(
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sha256(utf8Encoder.encode(JSON.stringify([0, evt.pubkey, evt.created_at, evt.kind, evt.tags, evt.content])))
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);
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}
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export {
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fastEventHash,
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getPow,
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minePow
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};
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