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.gitignore vendored
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/npm
/archive
entrypoint.offchain.pub.ts
entrypoint.bitcoiner.social.ts
pubkeys.premium.json
pubkeys.banned.ts
test.*.jsonl

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TESTING.md
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# Testing
Piping events from the last hour.
```shell
doas -u strfry strfry export --since $(date -d "1 hour ago" +%s) > output.jsonl
```

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2
mod.ts
View File

@ -1,6 +1,5 @@
export { type AntiDuplication, default as antiDuplicationPolicy } from './src/policies/anti-duplication-policy.ts';
export { default as filterPolicy, type Filter } from './src/policies/filter-policy.ts';
export { default as kindPolicy } from './src/policies/kind-policy.ts';
export { default as hellthreadPolicy, type Hellthread } from './src/policies/hellthread-policy.ts';
export { default as keywordPolicy } from './src/policies/keyword-policy.ts';
export { default as noopPolicy } from './src/policies/noop-policy.ts';
@ -10,7 +9,6 @@ export { default as pubkeyBanPolicy } from './src/policies/pubkey-ban-policy.ts'
export { default as rateLimitPolicy, type RateLimit } from './src/policies/rate-limit-policy.ts';
export { default as readOnlyPolicy } from './src/policies/read-only-policy.ts';
export { default as regexPolicy } from './src/policies/regex-policy.ts';
export { default as sizeLimitPolicy } from './src/policies/size-limit-policy.ts';
export { default as whitelistPolicy } from './src/policies/whitelist-policy.ts';
export { readStdin, writeStdout } from './src/io.ts';

13
src/policies/kind-policy.test.ts
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@ -1,13 +0,0 @@
import { assertEquals } from '../deps.ts';
import { buildEvent, buildInputMessage } from '../test.ts';
import kindPolicy from './kind-policy.ts';
Deno.test('rejects events by kind', async () => {
const msgA = buildInputMessage({ event: buildEvent({ kind: 1 }) });
const msgB = buildInputMessage({ event: buildEvent({ kind: 7 }) });
assertEquals((await kindPolicy(msgA, [7])).action, 'accept');
assertEquals((await kindPolicy(msgA, [7])).action, 'accept');
assertEquals((await kindPolicy(msgB, [7])).action, 'reject');
});

28
src/policies/kind-policy.ts
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@ -1,28 +0,0 @@
import { KindList, Policy } from '../types.ts';
/**
* Reject events by kind.
*
* @example
* ```ts
* // Block DMs, likes, and channel messages.
* kindPolicy({ kinds: [4, 7, 42] });
* ```
*/
const kindPolicy: Policy<KindList> = ({ event: { id, kind } }, kinds = []) => {
if (kinds.includes(kind)) {
return {
id,
action: 'reject',
msg: 'blocked: this event kind is not currently permitted',
};
}
return {
id,
action: 'accept',
msg: '',
};
};
export default kindPolicy;

17
src/policies/rate-limit-policy.ts Normal file → Executable file
View File

@ -12,10 +12,6 @@ interface RateLimit {
whitelist?: string[];
/** Database connection string. Default: `sqlite:///tmp/strfry-rate-limit-policy.sqlite3` */
databaseUrl?: string;
/** Enable debug mode to log rejected IPs. Default: `false`. */
debugMode?: boolean;
/** Path to the debug log file. Default: `./rate-limit-debug.log` */
debugLogPath?: string;
}
/**
@ -33,12 +29,8 @@ const rateLimitPolicy: Policy<RateLimit> = async (msg, opts = {}) => {
const {
interval = 60000,
max = 10,
whitelist = [
"51.81.244.81", // nostr.wine broadcast
],
whitelist = [],
databaseUrl = 'sqlite:///tmp/strfry-rate-limit-policy.sqlite3',
debugMode = false,
debugLogPath = './rate-limit-debug.log',
} = opts;
if ((msg.sourceType === 'IP4' || msg.sourceType === 'IP6') && !whitelist.includes(msg.sourceInfo)) {
@ -47,12 +39,6 @@ const rateLimitPolicy: Policy<RateLimit> = async (msg, opts = {}) => {
await db.set(msg.sourceInfo, count + 1, interval);
if (count >= max) {
if (debugMode) {
const timestamp = new Date().toISOString();
const logMessage = `${timestamp}: IP ${msg.sourceInfo} rejected, ${count} attempts\n`;
await Deno.writeTextFile(debugLogPath, logMessage, { append: true });
//Deno.writeTextFileSync(debugLogPath, logMessage, { append: true });
}
return {
id: msg.event.id,
action: 'reject',
@ -69,4 +55,5 @@ const rateLimitPolicy: Policy<RateLimit> = async (msg, opts = {}) => {
};
export default rateLimitPolicy;
export type { RateLimit };

22
src/policies/size-limit-policy.test.ts
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@ -1,22 +0,0 @@
import { assertEquals } from '../deps.ts';
import { buildEvent, buildInputMessage } from '../test.ts';
import sizeLimitPolicy from './size-limit-policy.ts';
Deno.test('Size limit policy test', async () => {
// Create a message under 12KB
const smallContent = 'Hello'.repeat(100); // Well under 12KB
const smallMessage = buildInputMessage({ event: buildEvent({ content: smallContent }) });
// Create a message over 12KB
const largeContent = 'Hello'.repeat(2500); // Over 12KB
const largeMessage = buildInputMessage({ event: buildEvent({ content: largeContent }) });
const largeReplaceable = buildInputMessage({ event: buildEvent({ content: largeContent, kind: 30078 }) });
// Test that a small message is accepted
assertEquals((await sizeLimitPolicy(smallMessage)).action, 'accept', 'Small message should be accepted');
// Test that a large message is rejected
assertEquals((await sizeLimitPolicy(largeMessage)).action, 'reject', 'Large message should be rejected');
assertEquals((await sizeLimitPolicy(largeReplaceable)).action, 'accept', 'Large replaceable event should be accepted');
});

46
src/policies/size-limit-policy.ts
View File

@ -1,46 +0,0 @@
import { Policy } from '../types.ts';
/** Policy options for `sizeLimitPolicy`. */
interface SizeLimitOptions {
/** Maximum size of the message content in bytes. Default: 8KB (8192 bytes) */
maxContentSize?: number;
/** List of excluded event kinds */
excludeKinds?: number[];
}
/**
* Reject events larger than a specified size. Only applies to regular events (kind is less than 10000), as all other kinds are replaceable or ephemeral anyway.
*
* @example
* ```ts
* // Reject events larger than a custom size (15KB) and exclude event kinds [1, 2].
* sizeLimitPolicy(msg, { maxContentSize: 15360, excludeKinds: [1, 2] });
* // Reject events larger than the default size (8KB) and exclude event kinds [3].
* sizeLimitPolicy(msg, { excludeKinds: [3] });
* ```
*/
const sizeLimitPolicy: Policy<SizeLimitOptions> = ({ event: { id, content, kind } }, opts = {}) => {
const {
excludeKinds = [3], // Follows aka Contact Lists (NIP-02)
maxContentSize = 8 * 1024 // Default size limit
} = opts;
// Convert the content into bytes and check its size
const contentSize = new TextEncoder().encode(content).length;
if (contentSize > maxContentSize && !excludeKinds.includes(kind) && kind < 10000) {
return {
id,
action: 'reject',
msg: `blocked: message is too large.`,
};
}
return {
id,
action: 'accept',
msg: '',
};
};
export default sizeLimitPolicy;

5
src/types.ts
View File

@ -54,7 +54,4 @@ type Policy<Opts = unknown> = (msg: InputMessage, opts?: Opts) => Promise<Output
/** Sync or async iterable of pubkeys, designed for efficiently loading from large files. */
type IterablePubkeys = Iterable<string> | AsyncIterable<string>;
/** Syncronous iterable of event kinds. */
type KindList = number[];
export type { Event, InputMessage, IterablePubkeys, KindList, OutputMessage, Policy };
export type { Event, InputMessage, IterablePubkeys, OutputMessage, Policy };