v0.13 Migration Guide
Quick Upgrade
Try upgrading first—most projects migrate with just a dependency update:
# Replace these
miden-objects = "0.12"
miden-lib = "0.12"
# With these
miden-protocol = "0.13"
miden-standards = "0.13"
Then run:
cargo update && cargo build
If you encounter errors, continue reading for detailed migration steps.
This guide is for:
- Rust client developers migrating from v0.12 → v0.13
- App developers using
miden-objects,miden-lib, or legacy MASM syntax - Smart contract authors using storage slots or note APIs
If you're starting fresh on v0.13, you can skip this guide and go directly to the Get Started.
What's New in v0.13
This release brings significant improvements alongside the breaking changes:
| Feature | Benefit |
|---|---|
| Named Storage | More intuitive and self-documenting storage access |
| Unified Auth | Simpler authentication with AuthScheme enum |
| Note Attachments | Cleaner separation of note data and metadata |
| Modern MASM Syntax | Cleaner syntax aligned with Rust conventions |
Compatibility
| Component | Required | Tested With |
|---|---|---|
| Miden VM | 0.20+ | 0.20.0 |
| miden-crypto | 0.19+ | 0.19.0 |
| Rust | 1.75+ | 1.82.0 |
Migration Philosophy
We group breaking changes into major releases to minimize disruption. When possible, we deprecate before removing—this guide covers features deprecated in v0.12 that are now removed, plus new breaking changes in v0.13.
Expect migration guides with each major version (roughly quarterly).
At a Glance
Key themes in this release:
| Change | Summary |
|---|---|
| Named Storage | Storage slots now identified by StorageSlotName instead of numeric indices |
| Note Attachments | NoteMetadata no longer stores aux or NoteExecutionHint; use NoteAttachment |
| Unified Input Notes | Input notes no longer split into authenticated/unauthenticated lists |
| Authentication APIs | Auth APIs unified around AuthScheme enum |
Migration Sections
Work through these sections in order for a complete migration:
| Section | Topics |
|---|---|
| 1. Imports & Dependencies | Crate renames, miden-protocol, miden-standards |
| 2. Account Changes | Named storage, keystore, components, procedure roots |
| 3. Note Changes | Attachments, tags, NetworkAccountTarget, MINT notes |
| 4. Transaction Changes | TransactionEvent → TransactionEventId |
| 5. Client Changes | Rust RPC, WebClient store, CLI changes |
| 6. MASM Changes | Syntax modernization, crypto renames |
| 7. Assembler Changes | LibraryPath removal, debug mode changes |
Final Checklist
Complete these steps to verify your migration:
- Update
Cargo.tomldependencies to v0.13 - Rename
miden-objects→miden-protocolimports - Rename
miden-lib→miden-standardsimports - Rename
StdLibrary→CoreLibrary - Update storage slot access to use
StorageSlotName - Refactor
NoteMetadatato useNoteAttachment - Update input notes API to use unified interface
- Update MASM syntax (
const.→const, etc.) - Run
cargo build— no errors - Run
cargo test— all tests pass
If your project builds and all tests pass, you've successfully migrated to v0.13.