fix: use overlay prefix and correct depth for rchash command

src/command/utility/rchash.ts

@@ -1,5 +1,5 @@
 import { System } from 'cafe-utility'
-import { LeafCommand } from 'furious-commander'
+import { LeafCommand, Option } from 'furious-commander'
 import { createSpinner } from '../../utils/spinner'
 import { createKeyValue } from '../../utils/text'
 import { RootCommand } from '../root-command'
@@ -9,12 +9,23 @@ export class Rchash extends RootCommand implements LeafCommand {
 
   public readonly description = 'Check reserve sampling duration'
 
+  @Option({
+    key: 'depth',
+    type: 'number',
+    minimum: 0,
+    maximum: 32,
+    description: 'Depth to use for sampling (default: committedDepth from node status)',
+  })
+  public depth!: number
+
   public async run(): Promise<void> {
     super.init()
     const addresses = await this.bee.getNodeAddresses()
-    const topology = await this.bee.getTopology()
+    const status = await this.bee.getStatus()
+    const depth = this.depth ?? status.committedDepth
+    const anchor = addresses.overlay.toHex().slice(0, Math.max(2, Math.ceil(depth / 8) * 2))
     let stillRunning = true
-    const promise = this.bee.rchash(topology.depth, addresses.overlay.toHex(), addresses.overlay.toHex())
+    const promise = this.bee.rchash(depth, anchor, anchor)
     promise.finally(() => {
       stillRunning = false
     })

test/command/utility.spec.ts

@@ -0,0 +1,13 @@
+import { describeCommand, invokeTestCli } from '../utility'
+
+describeCommand('Test Utility rchash command', ({ consoleMessages }) => {
+  it('should print reserve sampling duration', async () => {
+    await invokeTestCli(['utility', 'rchash'])
+    expect(consoleMessages.find(m => m.includes('Reserve sampling duration'))).toBeTruthy()
+  })
+
+  it('should print reserve sampling duration with custom depth', async () => {
+    await invokeTestCli(['utility', 'rchash', '--depth', '2'])
+    expect(consoleMessages.find(m => m.includes('Reserve sampling duration'))).toBeTruthy()
+  })
+})