Class PreEvaluationBlock<T>

A block candidate without evaluating actions (in its Transactions and a possible BlockAction) and state root hash.

Inheritance

Object

PreEvaluationBlockHeader

PreEvaluationBlock<T>

Implements

IPreEvaluationBlock<T>

IBlockContent<T>

IPreEvaluationBlockHeader

IBlockMetadata

Inherited Members

PreEvaluationBlockHeader.Codec

PreEvaluationBlockHeader.ProtocolVersion

PreEvaluationBlockHeader.Index

PreEvaluationBlockHeader.Timestamp

PreEvaluationBlockHeader.Nonce

PreEvaluationBlockHeader.Miner

PreEvaluationBlockHeader.PublicKey

PreEvaluationBlockHeader.Difficulty

PreEvaluationBlockHeader.TotalDifficulty

PreEvaluationBlockHeader.PreviousHash

PreEvaluationBlockHeader.TxHash

PreEvaluationBlockHeader.PreEvaluationHash

PreEvaluationBlockHeader.Metadata

PreEvaluationBlockHeader.MakeCandidateData(HashDigest<SHA256>, Nullable<ImmutableArray<Byte>>)

PreEvaluationBlockHeader.MakeSignature(PrivateKey, HashDigest<SHA256>)

PreEvaluationBlockHeader.VerifySignature(Nullable<ImmutableArray<Byte>>, HashDigest<SHA256>)

PreEvaluationBlockHeader.DeriveBlockHash(HashDigest<SHA256>, Nullable<ImmutableArray<Byte>>)

Namespace: Libplanet.Blocks

Assembly: Libplanet.dll

Syntax

public sealed class PreEvaluationBlock<T> : PreEvaluationBlockHeader, IPreEvaluationBlock<T>, IBlockContent<T>, IPreEvaluationBlockHeader, IBlockMetadata where T : IAction, new()

Type Parameters

Name	Description
T	A class implementing IAction to include. This type parameter is aligned with Transaction<T>'s type parameter.

Remarks

It guarantees that every instance of this type has a valid proof-of-work Nonce which satisfies its Difficulty.

Constructors

PreEvaluationBlock(IBlockContent<T>, Nonce)

Creates a PreEvaluationBlock<T> instance with its content data and a valid proof-of-work nonce which satisfies the required Difficulty.

Declaration

public PreEvaluationBlock(IBlockContent<T> content, Nonce nonce)

Parameters

Type	Name	Description
IBlockContent<T>	content	Block's content data.
Nonce	nonce	A valid proof-of-work nonce which satisfies the required Difficulty.

Remarks

PreEvaluationHash is automatically derived from the given arguments.

Exceptions

Type	Condition
InvalidBlockProtocolVersionException	Thrown when the content's to set is ProtocolVersion is less than 0, or greater than CurrentProtocolVersion, the latest known protocol version.
InvalidBlockIndexException	Thrown when the value to set is negative.
InvalidBlockDifficultyException	Thrown when the value to set is is negative.
InvalidBlockTotalDifficultyException	Thrown when the content's TotalDifficulty is less than its Difficulty.
InvalidTxSignatureException	Thrown when any tx signature is invalid or not signed by its signer.
InvalidTxNonceException	Thrown when the same tx nonce is used by a signer twice or more, or a tx nonce is used without its previous nonce by a signer. Note that this validates only a block's intrinsic integrity between its transactions, but does not guarantee integrity between blocks. Such validation needs to be conducted by BlockChain<T>.
InvalidTxGenesisHashException	Thrown when transactions to set have inconsistent genesis hashes.
InvalidBlockTxHashException	Thrown when the given block content's TxHash is not consistent with its Transactions.
InvalidBlockNonceException	Thrown when the given proof-of-work nonce does not satisfy the required Difficulty.

PreEvaluationBlock(IBlockContent<T>, Nonce, ImmutableArray<Byte>)

Creates a PreEvaluationBlock<T> instance with its content data, a valid proof-of-work nonce which satisfies the required Difficulty, and a preEvaluationHash digest derived from them.

Declaration

public PreEvaluationBlock(IBlockContent<T> content, Nonce nonce, ImmutableArray<byte> preEvaluationHash)

Parameters

Type	Name	Description
IBlockContent<T>	content	Block's content data.
Nonce	nonce	A valid proof-of-work nonce which satisfies the required Difficulty.
ImmutableArray<Byte>	preEvaluationHash	The hash digest derived from the given arguments.

Exceptions

Type	Condition
InvalidBlockProtocolVersionException	Thrown when the content's ProtocolVersion is less than 0, or greater than CurrentProtocolVersion, the latest known protocol version.
InvalidBlockIndexException	Thrown when the value to set is negative.
InvalidBlockDifficultyException	Thrown when the value to set is is negative.
InvalidBlockTotalDifficultyException	Thrown when the content's TotalDifficulty is less than its Difficulty.
InvalidTxSignatureException	Thrown when any tx signature is invalid or not signed by its signer.
InvalidTxNonceException	Thrown when the same tx nonce is used by a signer twice or more, or a tx nonce is used without its previous nonce by a signer. Note that this validates only a block's intrinsic integrity between its transactions, but does not guarantee integrity between blocks. Such validation needs to be conducted by BlockChain<T>.
InvalidTxGenesisHashException	Thrown when transactions to set have inconsistent genesis hashes.
InvalidBlockTxHashException	Thrown when the given block content's TxHash is not consistent with its Transactions.
InvalidBlockPreEvaluationHashException	Thrown when the given preEvaluationHash is invalid.
InvalidBlockNonceException	Thrown when the given proof-of-work nonce does not satisfy the required Difficulty.

Properties

Transactions

Transactions belonging to the block.

Declaration

public IReadOnlyList<Transaction<T>> Transactions { get; }

Property Value

Type	Description
IReadOnlyList<Transaction<T>>

Remarks

This is always ordered by Id.

Methods

DetermineStateRootHash(IAction, Predicate<Currency>, IStateStore)

Evaluates all actions in the Transactions and a blockAction (if any), and determines the StateRootHash from ground zero (i.e., empty state root).

Declaration

public HashDigest<SHA256> DetermineStateRootHash(IAction blockAction, Predicate<Currency> nativeTokenPredicate, IStateStore stateStore)

Parameters

Type	Name	Description
IAction	blockAction	An optional BlockAction.
Predicate<Currency>	nativeTokenPredicate	A predicate function to determine whether the specified Currency is a native token defined by chain's NativeTokens or not.
IStateStore	stateStore	The Libplanet.Blockchain.BlockChain`1.StateStore.

Returns

Type	Description
HashDigest<SHA256>	The resulting StateRootHash.

Remarks

This can be used with only genesis blocks. For blocks with indices greater than zero, use DetermineStateRootHash(BlockChain<T>) overloaded one instead.

DetermineStateRootHash(IAction, Predicate<Currency>, IStateStore, out IImmutableDictionary<String, IValue>)

Evaluates all actions in the Transactions and a blockAction (if any), and determines the StateRootHash from ground zero (i.e., empty state root).

Declaration

public HashDigest<SHA256> DetermineStateRootHash(IAction blockAction, Predicate<Currency> nativeTokenPredicate, IStateStore stateStore, out IImmutableDictionary<string, IValue> statesDelta)

Parameters

Type	Name	Description
IAction	blockAction	An optional BlockAction.
Predicate<Currency>	nativeTokenPredicate	A predicate function to determine whether the specified Currency is a native token defined by chain's NativeTokens or not.
IStateStore	stateStore	The Libplanet.Blockchain.BlockChain`1.StateStore.
IImmutableDictionary<String, IValue>	statesDelta	Returns made changes on states.

Returns

Type	Description
HashDigest<SHA256>	The resulting StateRootHash.

Remarks

This can be used with only genesis blocks. For blocks with indices greater than zero, use DetermineStateRootHash(BlockChain<T>) overloaded one instead.

DetermineStateRootHash(BlockChain<T>)

Evaluates all actions in the Transactions and an optional BlockAction, and determines the StateRootHash.

Declaration

public HashDigest<SHA256> DetermineStateRootHash(BlockChain<T> blockChain)

Parameters

Type	Name	Description
BlockChain<T>	blockChain	The blockchain on which actions are evaluated based.

Returns

Type	Description
HashDigest<SHA256>	The resulting StateRootHash.

DetermineStateRootHash(BlockChain<T>, StateCompleterSet<T>, out IImmutableDictionary<String, IValue>)

Evaluates all actions in the Transactions and an optional BlockAction, and determines the StateRootHash.

Declaration

public HashDigest<SHA256> DetermineStateRootHash(BlockChain<T> blockChain, StateCompleterSet<T> stateCompleterSet, out IImmutableDictionary<string, IValue> statesDelta)

Parameters

Type	Name	Description
BlockChain<T>	blockChain	The blockchain on which actions are evaluated based.
StateCompleterSet<T>	stateCompleterSet	The StateCompleterSet<T> to use when it needs states unevaluated yet.
IImmutableDictionary<String, IValue>	statesDelta	Returns made changes on states.

Returns

Type	Description
HashDigest<SHA256>	The resulting StateRootHash.

Evaluate(PrivateKey, IAction, Predicate<Currency>, IStateStore)

Evaluates all actions in the Transactions and a blockAction (if any), and returns a Block<T> instance combined with the StateRootHash determined from ground zero (i.e., empty state root). The returned Block<T> is signed by the given privateKey.

Declaration

public Block<T> Evaluate(PrivateKey privateKey, IAction blockAction, Predicate<Currency> nativeTokenPredicate, IStateStore stateStore)

Parameters

Type	Name	Description
PrivateKey	privateKey	The miner's private key to be used for signing the block. This must match to the block's Miner and PublicKey.
IAction	blockAction	An optional BlockAction.
Predicate<Currency>	nativeTokenPredicate	A predicate function to determine whether the specified Currency is a native token defined by chain's NativeTokens or not.
IStateStore	stateStore	The Libplanet.Blockchain.BlockChain`1.StateStore.

Returns

Type	Description
Block<T>	The block combined with the resulting StateRootHash. It is signed by the given privateKey.

Remarks

This can be used with only genesis blocks. For blocks with indices greater than zero, use DetermineStateRootHash(BlockChain<T>) overloaded one instead.

Evaluate(PrivateKey, BlockChain<T>)

Evaluates all actions in the Transactions and an optional BlockAction, and returns a Block<T> instance combined with the StateRootHash determined from ground zero (i.e., empty state root). The returned Block<T> is signed by the given privateKey.

Declaration

public Block<T> Evaluate(PrivateKey privateKey, BlockChain<T> blockChain)

Parameters

Type	Name	Description
PrivateKey	privateKey	The miner's private key to be used for signing the block. This must match to the block's Miner and PublicKey.
BlockChain<T>	blockChain	The blockchain on which actions are evaluated based.

Returns

Type	Description
Block<T>	The block combined with the resulting StateRootHash. It is signed by the given privateKey.

Remarks

As blocks have their signatures since the ProtocolVersion 2, it is not usable with blocks of the earlier ProtocolVersions than 2. To create a Block<T> instance with ProtocolVersion less than 2, use Block<T>'s constructors with null signatures.

Sign(PrivateKey, HashDigest<SHA256>)

Signs the block content with the given stateRootHash.

Declaration

public Block<T> Sign(PrivateKey privateKey, HashDigest<SHA256> stateRootHash)

Parameters

Type	Name	Description
PrivateKey	privateKey	The miner's private key to be used for signing the block. This must match to the block's Miner and PublicKey.
HashDigest<SHA256>	stateRootHash	The state root hash to include to the input message to sign.

Returns

Type	Description
Block<T>	The signed block with the stateRootHash.

Remarks

As blocks have their signatures since the ProtocolVersion 2, it is not usable with blocks of the earlier ProtocolVersions than 2. To create a Block<T> instance with ProtocolVersion less than 2, use Block<T>'s constructors with null signatures.

Implements

IPreEvaluationBlock<T>

IBlockContent<T>

IPreEvaluationBlockHeader

IBlockMetadata