feat: add generate-secret-and-hash to cli (#7977)

yarn-project/cli/src/cmds/misc/generate_secret_and_hash.ts

@@ -0,0 +1,15 @@
+import { computeSecretHash } from '@aztec/aztec.js';
+import { Fr } from '@aztec/foundation/fields';
+import { type LogFn } from '@aztec/foundation/log';
+
+export function generateSecretAndHash(log: LogFn) {
+  const secret = Fr.random();
+
+  // We hash this the same way that aztec nr hash does.
+  const secretHash = computeSecretHash(secret);
+
+  log(`
+    Secret: ${secret}
+    Secret hash: ${secretHash}
+  `);
+}

yarn-project/cli/src/cmds/misc/index.ts

@@ -48,6 +48,14 @@ export function injectCommands(program: Command, log: LogFn) {
       computeSelector(functionSignature, log);
     });
 
+  program
+    .command('generate-secret-and-hash')
+    .description('Generates an arbitrary secret (Fr), and its hash (using aztec-nr defaults)')
+    .action(async () => {
+      const { generateSecretAndHash } = await import('./generate_secret_and_hash.js');
+      generateSecretAndHash(log);
+    });
+
   program
     .command('update')
     .description('Updates Nodejs and Noir dependencies')