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November 11, 2022 14:30
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Deno twtxt hash calc
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import { encode } from "https://deno.land/std@0.163.0/encoding/base32.ts"; | |
import { blake2b } from "https://esm.sh/blakejs@1.2.1"; | |
import { DateTime } from "https://esm.sh/luxon@3.1.0"; | |
import { assertEquals } from "https://deno.land/std@0.163.0/testing/asserts.ts"; | |
function base32(payload: Uint8Array) { | |
return encode(payload).replace(/=/g, "").toLowerCase(); | |
} | |
function blake2b256(payload: string) { | |
return blake2b(payload, undefined, 32); | |
} | |
function formatRFC3339(text: string) { | |
return DateTime.fromISO(text, { setZone: true, zone: "utc" }) | |
.toFormat("yyyy-MM-dd'T'HH:mm:ssZZ") | |
.replace(/\+00:00$/, "Z"); | |
} | |
const twt = { | |
url: "https://twtxt.net/user/prologic/twtxt.txt", | |
hash: "o6dsrga", | |
created: "2020-07-18T12:39:52Z", | |
content: "Hello World! 😊", | |
}; | |
const created = formatRFC3339(twt.created); | |
const payload = [twt.url, created, twt.content].join("\n"); | |
const hash = base32(blake2b256(payload)).slice(-7); | |
Deno.test("hash", () => { | |
assertEquals(hash, twt.hash); | |
}); |
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