Imports & Dependencies

The miden-objects and miden-lib crates have been renamed. All imports must be updated.

Quick Fix

Cargo.toml

# Remove these
miden-objects = "0.12"
miden-lib = "0.12"

# Add these
miden-protocol = "0.13"
miden-standards = "0.13"

---

Crate Renames

Core types have moved from miden-objects and miden-lib to new packages.

Old Package	New Package	Contains
miden-objects	miden-protocol	Core protocol types
miden-lib	miden-standards	Standard library

Cargo.toml

Cargo.toml

# Before
- miden-objects = "0.12"
- miden-lib = "0.12"

# After
+ miden-protocol = "0.13"
+ miden-standards = "0.13"

Rust Imports

src/lib.rs

# Before
- use miden_objects::{Account, Note, Transaction};
- use miden_lib::StdLibrary;

# After
+ use miden_protocol::{Account, Note, Transaction};
+ use miden_standards::CoreLibrary;

Use your IDE's find-and-replace to update all imports at once:

• Find: miden_objects → Replace: miden_protocol
• Find: miden_lib → Replace: miden_standards

---

Miden VM and Crypto Updates

Update Miden VM to 0.20 and miden-crypto to 0.19:

Cargo.toml

miden-vm = "0.20"
miden-crypto = "0.19"

---

Core Library Rename

The standard library has been renamed from StdLibrary to CoreLibrary.

Rust

src/lib.rs

- use miden_lib::StdLibrary;
- let stdlib = StdLibrary::default();

+ use miden_standards::CoreLibrary;
+ let corelib = CoreLibrary::default();

MASM Imports

src/contract.masm

# Before
- use.std::crypto::hashes

# After
+ use.miden::core::crypto::hashes

---

Migration Steps

1. Update Cargo.toml with new package names and versions
2. Run cargo update to fetch new packages
3. Find and replace old import paths throughout your codebase
4. Rename StdLibrary to CoreLibrary
5. Update MASM imports from std:: to miden::core::
6. Compile and fix any remaining import errors

---

Common Errors

Error	Cause	Fix
unresolved import 'miden_objects'	Old package name	Change to miden_protocol
cannot find 'StdLibrary' in 'miden_lib'	Renamed to CoreLibrary	Use miden_standards::CoreLibrary
unresolved import 'std::crypto'	MASM namespace change	Use miden::core::crypto