zolfa
/
tendermint
1
0
Fork 0
Code Issues 0 Pull Requests 0 Projects 0 Releases 221 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
6265 Commits
183 Branches
291 MiB
 
 
 
 
 
 
Tree: 3132f7fad4
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '3132f7fad4'
${ noResults }
tendermint/abci/example/kvstore/README.md

1.1 KiB
Raw Blame History

KVStore

There are two app's here: the KVStoreApplication and the PersistentKVStoreApplication.

KVStoreApplication

The KVStoreApplication is a simple merkle key-value store. Transactions of the form key=value are stored as key-value pairs in the tree. Transactions without an = sign set the value to the key. The app has no replay protection (other than what the mempool provides).

PersistentKVStoreApplication

The PersistentKVStoreApplication wraps the KVStoreApplication and provides two additional features:

  1. persistence of state across app restarts (using Tendermint's ABCI-Handshake mechanism)
  2. validator set changes

The state is persisted in leveldb along with the last block committed, and the Handshake allows any necessary blocks to be replayed. Validator set changes are effected using the following transaction format:

val:pubkey1/power1,addr2/power2,addr3/power3"

where power1 is the new voting power for the validator with pubkey1 (possibly a new one). There is no sybil protection against new validators joining. Validators can be removed by setting their power to 0.