feat: prompt user for stamp type, when flag not set

src/command/stamp/create.ts

@@ -1,7 +1,7 @@
 import { BatchId, Duration, Size } from '@ethersphere/bee-js'
 import { Dates, Numbers } from 'cafe-utility'
 import chalk from 'chalk'
-import { LeafCommand, Option } from 'furious-commander'
+import { LeafCommand, Option, Utils } from 'furious-commander'
 import { exit } from 'process'
 import { isChainStateReady } from '../../utils/chainsync'
 import { createSpinner } from '../../utils/spinner'
@@ -43,6 +43,10 @@ export class Create extends StampCommand implements LeafCommand {
 
   public postageBatchId!: BatchId
 
+  private shouldAskForImmutable(): boolean {
+    return !this.quiet && !this.yes && Utils.getSourcemap()['immutable'] === 'default'
+  }
+
   public async run(): Promise<void> {
     super.init()
 
@@ -80,6 +84,14 @@ export class Create extends StampCommand implements LeafCommand {
       return
     }
 
+    if (this.shouldAskForImmutable()) {
+      this.console.log('Please select the type of the postage stamp')
+      this.console.log(`${chalk.bold('Immutable')}: at full capacity, new uploads are rejected`)
+      this.console.log(`${chalk.bold('Mutable')}: at full capacity, new uploads overwrite old content`)
+      this.immutable = (await this.console.promptList(['Immutable', 'Mutable'], 'Type')) === 'Immutable'
+      this.console.log('')
+    }
+
     this.console.log('You have provided the following parameters:')
     this.console.log(createKeyValue('Capacity', size.toFormattedString()))
     this.console.log(createKeyValue('TTL', Dates.secondsToHumanTime(duration.toSeconds())))

test/prompt/stamp-prompt.spec.ts

@@ -21,6 +21,31 @@ describeCommand('Postage stamp prompt', ({ consoleMessages, getNthLastMessage })
     })
   })
 
+  describe('Stamp type', () => {
+    it('stamp create should prompt for immutable or mutable', async () => {
+      jest.spyOn(inquirer, 'prompt').mockResolvedValueOnce({ value: 'Mutable' }).mockResolvedValueOnce({ value: false })
+      await invokeTestCli(['stamp', 'create', '--capacity', '1GB', '--ttl', '1d'])
+      expect(inquirer.prompt).toHaveBeenCalledWith({
+        message: 'Type',
+        name: 'value',
+        prefix: chalk.bold.cyan('?'),
+        type: 'list',
+        choices: ['Immutable', 'Mutable'],
+        loop: false,
+      })
+      expect(consoleMessages).toContain(createKeyValue('Type', 'Mutable'))
+    })
+
+    it('stamp create should not prompt for type when it is given', async () => {
+      const prompt = jest.spyOn(inquirer, 'prompt')
+      prompt.mockClear()
+      prompt.mockResolvedValueOnce({ value: false })
+      await invokeTestCli(['stamp', 'create', '--capacity', '1GB', '--ttl', '1d', '--immutable', 'false'])
+      expect(prompt).not.toHaveBeenCalledWith(expect.objectContaining({ type: 'list' }))
+      expect(consoleMessages).toContain(createKeyValue('Type', 'Mutable'))
+    })
+  })
+
   describe('Rename postage stamp', () => {
     it('should prompt for new name', async () => {
       jest.spyOn(inquirer, 'prompt').mockResolvedValueOnce({ value: 'new-stamp-name' })