feat(wallet): add custodial wallet persistence, status transitions, and KMS references

src/types/wallet-provisioning.types.ts

@@ -1,13 +1,47 @@
+import type { TransitionMap } from '../utils/transitions'
+import { canTransition } from '../utils/transitions'
+
 export const WALLET_STATUSES = [
   'RESERVED',
   'PROVISIONING',
   'RETRYABLE',
   'ACTIVE',
+  'EXPORTING',
+  'MIGRATED',
   'FAILED',
+  'DISABLED',
 ] as const
 
 export type WalletStatus = (typeof WALLET_STATUSES)[number]
 
+export const WALLET_TRANSITIONS: TransitionMap<WalletStatus> = {
+  RESERVED: ['PROVISIONING', 'FAILED'],
+  PROVISIONING: ['ACTIVE', 'RETRYABLE', 'FAILED'],
+  RETRYABLE: ['PROVISIONING', 'FAILED'],
+  ACTIVE: ['EXPORTING', 'DISABLED'],
+  EXPORTING: ['ACTIVE', 'MIGRATED', 'FAILED'],
+  MIGRATED: ['DISABLED'],
+  FAILED: ['RESERVED'],
+  DISABLED: [],
+} as const
+
+export function canTransitionWallet(from: WalletStatus, to: WalletStatus): boolean {
+  return canTransition(WALLET_TRANSITIONS, from, to)
+}
+
+export class InvalidWalletTransitionError extends Error {
+  constructor(readonly from: WalletStatus, readonly to: WalletStatus) {
+    super(`Cannot transition wallet status from '${from}' to '${to}'`)
+    this.name = 'InvalidWalletTransitionError'
+  }
+}
+
+export function assertValidWalletTransition(from: WalletStatus, to: WalletStatus): void {
+  if (!canTransitionWallet(from, to)) {
+    throw new InvalidWalletTransitionError(from, to)
+  }
+}
+
 export const WALLET_JOB_STATUSES = [
   'PENDING',
   'PROCESSING',

tests/unit/wallet-transitions.test.ts

@@ -0,0 +1,79 @@
+import { describe, expect, it } from 'vitest'
+import {
+  assertValidWalletTransition,
+  canTransitionWallet,
+  InvalidWalletTransitionError,
+  WALLET_STATUSES,
+  WALLET_TRANSITIONS,
+} from '../../src/types/wallet-provisioning.types'
+
+describe('wallet status transitions and lifecycle guards', () => {
+  it('defines all required statuses', () => {
+    expect(WALLET_STATUSES).toEqual([
+      'RESERVED',
+      'PROVISIONING',
+      'RETRYABLE',
+      'ACTIVE',
+      'EXPORTING',
+      'MIGRATED',
+      'FAILED',
+      'DISABLED',
+    ])
+  })
+
+  it('allows valid provisioning and lifecycle paths', () => {
+    // Normal provisioning flow
+    expect(canTransitionWallet('RESERVED', 'PROVISIONING')).toBe(true)
+    expect(canTransitionWallet('PROVISIONING', 'ACTIVE')).toBe(true)
+
+    // Retryable failure flow
+    expect(canTransitionWallet('PROVISIONING', 'RETRYABLE')).toBe(true)
+    expect(canTransitionWallet('RETRYABLE', 'PROVISIONING')).toBe(true)
+
+    // Export and migration flow
+    expect(canTransitionWallet('ACTIVE', 'EXPORTING')).toBe(true)
+    expect(canTransitionWallet('EXPORTING', 'MIGRATED')).toBe(true)
+    expect(canTransitionWallet('EXPORTING', 'ACTIVE')).toBe(true) // aborted/failed export returns to active
+
+    // Disabling and failure recovery
+    expect(canTransitionWallet('ACTIVE', 'DISABLED')).toBe(true)
+    expect(canTransitionWallet('MIGRATED', 'DISABLED')).toBe(true)
+    expect(canTransitionWallet('PROVISIONING', 'FAILED')).toBe(true)
+    expect(canTransitionWallet('FAILED', 'RESERVED')).toBe(true)
+  })
+
+  it('rejects illegal or out-of-order state transitions', () => {
+    // Cannot skip provisioning
+    expect(canTransitionWallet('RESERVED', 'ACTIVE')).toBe(false)
+    expect(canTransitionWallet('RESERVED', 'MIGRATED')).toBe(false)
+
+    // Cannot transition from terminal DISABLED state
+    expect(canTransitionWallet('DISABLED', 'ACTIVE')).toBe(false)
+    expect(canTransitionWallet('DISABLED', 'RESERVED')).toBe(false)
+
+    // Cannot jump straight to migrated without export
+    expect(canTransitionWallet('ACTIVE', 'MIGRATED')).toBe(false)
+
+    // Self transitions are not permitted
+    WALLET_STATUSES.forEach((status) => {
+      expect(canTransitionWallet(status, status)).toBe(false)
+    })
+  })
+
+  it('throws InvalidWalletTransitionError on illegal transitions via assertValidWalletTransition', () => {
+    expect(() => assertValidWalletTransition('RESERVED', 'ACTIVE')).toThrow(
+      InvalidWalletTransitionError,
+    )
+    expect(() => assertValidWalletTransition('DISABLED', 'ACTIVE')).toThrow(
+      'Cannot transition wallet status from \'DISABLED\' to \'ACTIVE\'',
+    )
+    expect(() => assertValidWalletTransition('ACTIVE', 'EXPORTING')).not.toThrow()
+  })
+
+  it('has exhaustive transition entries for every status', () => {
+    for (const status of WALLET_STATUSES) {
+      expect(WALLET_TRANSITIONS).toHaveProperty(status)
+      expect(Array.isArray(WALLET_TRANSITIONS[status])).toBe(true)
+    }
+  })
+})