How to reset the state of your chain

This guide will walk you through how you reset the state of your chain.

Disclaimer

By definition, resetting the state is deleting your chain's data. Make sure you understand the implications of this prior to completing this guide.

Some reason you might need to reset the state of your chain are:

• During testing and development
• During upgrades with breaking changes
• Hardforks

Prerequisites

In order to complete this guide, you will need to have completed either the quick start tutorial or the build our chain tutorial.

Quick Start

When you run your chain with testapp start you will create a .testapp directory in your root directory.

This directory will look like the following.

tree $HOME/.testapp

├── config
│   ├── genesis.json
│   ├── node_key.json
│   ├── evolve.yaml
│   └── signer.json
└── data
    ├── cache
    │   ├── data
    │   │   ├── da_included.gob
    │   │   ├── hashes.gob
    │   │   ├── items_by_hash.gob
    │   │   └── items_by_height.gob
    │   └── header
    │       ├── da_included.gob
    │       ├── hashes.gob
    │       ├── items_by_hash.gob
    │       └── items_by_height.gob
    ├── executor
    │   ├── 000001.sst
    │   ├── 000002.vlog
    │   ├── 000003.vlog
    │   ├── 00003.mem
    │   ├── DISCARD
    │   ├── KEYREGISTRY
    │   ├── LOCK
    │   └── MANIFEST
    └── testapp
        ├── 000001.sst
        ├── 000002.sst
        ├── 000002.vlog
        ├── 000003.sst
        ├── 000003.vlog
        ├── DISCARD
        ├── KEYREGISTRY
        └── MANIFEST

To reset the state of the chain, delete the content of the data directory.

Alternatively, you can use this command.

testapp unsafe-clean

When you launch your chain again with testapp start your data directory will be re-populated and you will see your chain starting at block height 1 again.

gm-world

When you ran your gm-world chain in the build your chain tutorial, it created a .gm directory in your $HOME directory.

This directory will look like the following:

tree $HOME/.gm

├── config
│   ├── app.toml
│   ├── client.toml
│   ├── config.toml
│   ├── genesis.json
│   ├── gentx
│   │   └── gentx-418077c64f0cf5824c24487c9cce38241de677cd.json
│   ├── node_key.json
│   ├── priv_validator_key.json
│   └── evolve.yaml
├── data
│   ├── application.db
│   │   ├── 000001.log
│   │   ├── CURRENT
│   │   ├── LOCK
│   │   ├── LOG
│   │   └── MANIFEST-000000
│   ├── cache
│   │   ├── data
│   │   │   ├── da_included.gob
│   │   │   ├── hashes.gob
│   │   │   ├── items_by_hash.gob
│   │   │   └── items_by_height.gob
│   │   └── header
│   │       ├── da_included.gob
│   │       ├── hashes.gob
│   │       ├── items_by_hash.gob
│   │       └── items_by_height.gob
│   ├── priv_validator_state.json
│   ├── evolve
│   │   ├── 000001.sst
│   │   ├── 000001.vlog
│   │   ├── DISCARD
│   │   ├── KEYREGISTRY
│   │   └── MANIFEST
│   ├── snapshots
│   │   └── metadata.db
│   │       ├── 000001.log
│   │       ├── CURRENT
│   │       ├── LOCK
│   │       ├── LOG
│   │       └── MANIFEST-000000
│   └── tx_index.db
│       ├── 000001.log
│       ├── CURRENT
│       ├── LOCK
│       ├── LOG
│       └── MANIFEST-000000
└── keyring-test
    ├── 87af99a184613860ee9563be57a9fb4e7b25acb8.address
    ├── alice.info
    ├── bob.info
    └── e24d9eeca2d24193bdd98ed9116ff70f8a2e2b5e.address

The directories you need to delete to reset your state are in the data directory.

Alternatively, you can run the following command to delete the data directories:

gmd comet unsafe-reset-all

When you launch your chain again with your gmd start <flags> command, these data directories will be re-created and you will see your chain starting at block height 1 again.