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Merge branch 'upgrade-nostr-tools' into 'develop'

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Upgrade nostr-tools, simplify powPolicy

See merge request soapbox-pub/strfry-policies!8
This commit is contained in:
Alex Gleason 2023-04-11 22:21:50 +00:00
commit fc690bd44c
4 changed files with 38 additions and 90 deletions
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78
deno.lock
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@ -177,49 +177,39 @@
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},
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}
}
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}
}

2
src/deps.ts
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@ -1,4 +1,4 @@
export { readLines } from 'https://deno.land/std@0.181.0/io/mod.ts';
export { assert, assertEquals } from 'https://deno.land/std@0.181.0/testing/asserts.ts';
export { Keydb } from 'https://deno.land/x/keydb@1.0.0/sqlite.ts';
export * as secp from 'npm:@noble/secp256k1@^1.7.1';
export { type Filter, matchFilter, nip13 } from 'https://esm.sh/v114/nostr-tools@1.8.4';

3
src/policies/filter-policy.ts
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@ -1,7 +1,6 @@
import { type Filter, matchFilter } from '../deps.ts';
import { Policy } from '../types.ts';
import { type Filter, matchFilter } from 'https://esm.sh/v113/nostr-tools@1.8.1';
/**
* Reject all events which don't match the filter.
*

45
src/policies/pow-policy.ts
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@ -1,4 +1,4 @@
import { secp } from '../deps.ts';
import { nip13 } from '../deps.ts';
import type { Policy } from '../types.ts';
@ -12,7 +12,7 @@ interface POW {
const powPolicy: Policy<POW> = ({ event }, opts = {}) => {
const { difficulty = 1 } = opts;
const pow = getPow(event.id);
const pow = nip13.getPow(event.id);
const nonce = event.tags.find((t) => t[0] === 'nonce');
if (pow >= difficulty && nonce && Number(nonce[2]) >= difficulty) {
@ -30,45 +30,4 @@ const powPolicy: Policy<POW> = ({ event }, opts = {}) => {
};
};
/** Get POW difficulty from a Nostr hex ID. */
function getPow(id: string): number {
return getLeadingZeroBits(secp.utils.hexToBytes(id));
}
/**
* Get number of leading 0 bits. Adapted from nostream.
* https://github.com/Cameri/nostream/blob/fb6948fd83ca87ce552f39f9b5eb780ea07e272e/src/utils/proof-of-work.ts
*/
function getLeadingZeroBits(hash: Uint8Array): number {
let total: number, i: number, bits: number;
for (i = 0, total = 0; i < hash.length; i++) {
bits = msb(hash[i]);
total += bits;
if (bits !== 8) {
break;
}
}
return total;
}
/**
* Adapted from nostream.
* https://github.com/Cameri/nostream/blob/fb6948fd83ca87ce552f39f9b5eb780ea07e272e/src/utils/proof-of-work.ts
*/
function msb(b: number) {
let n = 0;
if (b === 0) {
return 8;
}
// deno-lint-ignore no-cond-assign
while (b >>= 1) {
n++;
}
return 7 - n;
}
export default powPolicy;