Trait Mappable

pub trait Mappable {
    type Key: ToOwned + ?Sized;
    type OwnedKey: From<<Self::Key as ToOwned>::Owned> + Clone;
    type Value: ToOwned + ?Sized;
    type OwnedValue: From<<Self::Value as ToOwned>::Owned> + Clone;
}

Mappable type with Key and Value.

Example

use fuel_storage::Mappable;
pub struct Contract;

impl Mappable for Contract {
    /// The `[u8; 32]` is a primitive type, so we can't optimize it more.
    type Key = Self::OwnedKey;
    type OwnedKey = [u8; 32];
    /// It is optimized to use slice instead of vector.
    type Value = [u8];
    type OwnedValue = Vec<u8>;
}

Required Associated Types

type Key: ToOwned + ?Sized

The key type is used during interaction with the storage. In most cases, it is the same as Self::OwnedKey.

type OwnedKey: From<<Self::Key as ToOwned>::Owned> + Clone

The owned type of the Key retrieving from the storage.

type Value: ToOwned + ?Sized

The value type is used while setting the value to the storage. In most cases, it is the same as Self::OwnedValue, but it is without restriction and can be used for performance optimizations.

type OwnedValue: From<<Self::Value as ToOwned>::Owned> + Clone

The owned type of the Value retrieving from the storage.

Implementations on Foreign Types

impl Mappable for NodesTable

type Key = <NodesTable as Mappable>::OwnedKey

type OwnedKey = u64

type OwnedValue = (u64, [u8; 32])

type Value = <NodesTable as Mappable>::OwnedValue

impl Mappable for NodesTable

type Key = <NodesTable as Mappable>::OwnedKey

type OwnedKey = [u8; 32]

type OwnedValue = (u32, u8, [u8; 32], [u8; 32])

type Value = <NodesTable as Mappable>::OwnedValue

Implementors

impl Mappable for ContractsAssetsMerkleData

type Key = [u8; 32]

type OwnedKey = <ContractsAssetsMerkleData as Mappable>::Key

type Value = (u32, u8, [u8; 32], [u8; 32])

type OwnedValue = <ContractsAssetsMerkleData as Mappable>::Value

impl Mappable for ContractsAssetsMerkleMetadata

type Key = ContractId

type OwnedKey = <ContractsAssetsMerkleMetadata as Mappable>::Key

type Value = SparseMerkleMetadata

type OwnedValue = <ContractsAssetsMerkleMetadata as Mappable>::Value

impl Mappable for ContractsStateMerkleData

type Key = [u8; 32]

type OwnedKey = <ContractsStateMerkleData as Mappable>::Key

type Value = (u32, u8, [u8; 32], [u8; 32])

type OwnedValue = <ContractsStateMerkleData as Mappable>::Value

impl Mappable for ContractsStateMerkleMetadata

type Key = ContractId

type OwnedKey = <ContractsStateMerkleMetadata as Mappable>::Key

type Value = SparseMerkleMetadata

type OwnedValue = <ContractsStateMerkleMetadata as Mappable>::Value

impl Mappable for FuelBlockMerkleData

type Key = u64

type OwnedKey = <FuelBlockMerkleData as Mappable>::Key

type Value = (u64, [u8; 32])

type OwnedValue = <FuelBlockMerkleData as Mappable>::Value

impl Mappable for FuelBlockMerkleMetadata

type Key = DenseMetadataKey<BlockHeight>

type OwnedKey = <FuelBlockMerkleMetadata as Mappable>::Key

type Value = DenseMerkleMetadata

type OwnedValue = <FuelBlockMerkleMetadata as Mappable>::Value

impl Mappable for BlobData

type Key = <BlobData as Mappable>::OwnedKey

type OwnedKey = BlobId

type OwnedValue = BlobBytes

type Value = [u8]

impl Mappable for Coins

type Key = <Coins as Mappable>::OwnedKey

type OwnedKey = UtxoId

type Value = <Coins as Mappable>::OwnedValue

type OwnedValue = CompressedCoin

impl Mappable for ConsensusParametersVersions

type Key = <ConsensusParametersVersions as Mappable>::OwnedKey

type OwnedKey = u32

type Value = <ConsensusParametersVersions as Mappable>::OwnedValue

type OwnedValue = ConsensusParameters

impl Mappable for ContractsAssets

type Key = <ContractsAssets as Mappable>::OwnedKey

type OwnedKey = ContractsAssetKey

type OwnedValue = <ContractsAssets as Mappable>::Value

type Value = u64

impl Mappable for ContractsLatestUtxo

type Key = <ContractsLatestUtxo as Mappable>::OwnedKey

type OwnedKey = ContractId

type Value = <ContractsLatestUtxo as Mappable>::OwnedValue

type OwnedValue = ContractUtxoInfo

impl Mappable for ContractsRawCode

type Key = <ContractsRawCode as Mappable>::OwnedKey

type OwnedKey = ContractId

type OwnedValue = Contract

type Value = [u8]

impl Mappable for ContractsState

type Key = <ContractsState as Mappable>::OwnedKey

type OwnedKey = ContractsStateKey

type OwnedValue = ContractsStateData

type Value = [u8]

impl Mappable for FuelBlocks

type Key = <FuelBlocks as Mappable>::OwnedKey

type OwnedKey = BlockHeight

type Value = <FuelBlocks as Mappable>::OwnedValue

type OwnedValue = Block<Bytes32>

impl Mappable for Messages

type Key = <Messages as Mappable>::OwnedKey

type OwnedKey = Nonce

type Value = <Messages as Mappable>::OwnedValue

type OwnedValue = Message

impl Mappable for ProcessedTransactions

type Key = <ProcessedTransactions as Mappable>::OwnedKey

type OwnedKey = Bytes32

type Value = <ProcessedTransactions as Mappable>::OwnedValue

type OwnedValue = ()

impl Mappable for SealedBlockConsensus

type Key = <SealedBlockConsensus as Mappable>::OwnedKey

type OwnedKey = BlockHeight

type Value = <SealedBlockConsensus as Mappable>::OwnedValue

type OwnedValue = Consensus

impl Mappable for StateTransitionBytecodeVersions

type Key = <StateTransitionBytecodeVersions as Mappable>::OwnedKey

type OwnedKey = u32

type Value = <StateTransitionBytecodeVersions as Mappable>::OwnedValue

type OwnedValue = Bytes32

impl Mappable for Transactions

type Key = <Transactions as Mappable>::OwnedKey

type OwnedKey = Bytes32

type Value = <Transactions as Mappable>::OwnedValue

type OwnedValue = Transaction

impl Mappable for UploadedBytecodes

type Key = <UploadedBytecodes as Mappable>::OwnedKey

type OwnedKey = Bytes32

type OwnedValue = UploadedBytecode

type Value = <UploadedBytecodes as Mappable>::OwnedValue