All contract data is stored in the same key-value data store on the blockchain
(called Storage and imported from near-sdk-as) with a few convenience
methods for reading, writing, searching and deleting keys and value.
We also provide a few collections for convenience including
PersistentVector
PersistentMap
PersistentDeque
These collections wrap the Storage class to mimic a Map, Vector (aka. Array) and Deque.
And of course you can use these as examples as inspiration for your own custom data structures.
All of these collections read and write from Storage abstracting away a lot of what you might
want to add to the Storage object.
IMPORTANT NOTE:
Since all data stored on the blockchain is kept in a single key-value store under the contract account,
you must always use a unique storage prefix for different collections to avoid data collision.
Contract function calls are stateless.
All contract data is stored in the same key-value data store on the blockchain (called
Storageand imported fromnear-sdk-as) with a few convenience methods for reading, writing, searching and deleting keys and value.We also provide a few collections for convenience including
PersistentVectorPersistentMapPersistentDequeThese collections wrap the
Storageclass to mimic a Map, Vector (aka. Array) and Deque. And of course you can use these as examples as inspiration for your own custom data structures.All of these collections read and write from
Storageabstracting away a lot of what you might want to add to theStorageobject.IMPORTANT NOTE: Since all data stored on the blockchain is kept in a single key-value store under the contract account, you must always use a unique storage prefix for different collections to avoid data collision.