# Migration Guide v4.0

# API Changes

# cosmos

Regen Ledger v4.0 does not include an updated version of Cosmos SDK and therefore there are no changes to the API for Cosmos SDK modules.

# regen.data

Regen Ledger v4.0 introduces regen.data.v1 (opens new window).

# regen.ecocredit

Regen Ledger v4.0 migrates from regen.ecocredit.v1alpha1 (opens new window) to regen.ecocredit.v1 (opens new window).

# Msg Service

# Query Service

# Types

# Events

# regen.ecocredit.basket

Regen Ledger v4.0 includes non-breaking changes to regen.basket.v1 (opens new window).

# Msg Service

# Query Service

# Types

# Events

# regen.ecocredit.marketplace

Regen Ledger v4.0 introduces regen.ecocredit.marketplace.v1 (opens new window).