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nip01: add support for filter prefix in authors and ids

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so clients can filter events by prefix in authors and ids as
described in nip-01, i.e. to subscribe to mined events starting
with zeroes or to add some privacy for clients that may not want
to disclose the exact filter.

see also https://github.com/scsibug/nostr-rs-relay/issues/104
This commit is contained in:
OFF0
2023-03-12 16:31:08 +01:00
committed by fiatjaf_
parent b0a58e2ca4
commit 3bdb68020d
2 changed files with 34 additions and 3 deletions
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13
filter.ts
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@@ -15,10 +15,17 @@ export function matchFilter(
filter: Filter,
event: Event
): boolean {
if (filter.ids && filter.ids.indexOf(event.id) === -1) return false
if (filter.ids && filter.ids.indexOf(event.id) === -1) {
if (!filter.ids.some(prefix => event.id.startsWith(prefix))) {
return false
}
}
if (filter.kinds && filter.kinds.indexOf(event.kind) === -1) return false
if (filter.authors && filter.authors.indexOf(event.pubkey) === -1)
return false
if (filter.authors && filter.authors.indexOf(event.pubkey) === -1) {
if (!filter.authors.some(prefix => event.pubkey.startsWith(prefix))) {
return false
}
}
for (let f in filter) {
if (f[0] === '#') {