Crate sp_statement_store

Expand description

A crate which contains statement-store primitives.

Re-exports§

Statement: Statement structure.
StatementAllowance: Per-account statement allowance: the resource budget an account may consume in the store.
Topic: Statement topic.

Error: Statement store error.
Field: Statement attributes. Each statement is a list of 0 or more fields. Fields may only appear once and in the order declared here.
FilterDecision: Decision returned by the filter used in StatementStore::statements_by_hashes.
InvalidReason: Reason why a statement failed validation.
OptimizedTopicFilter: Topic filter for statement subscriptions, optimized for matching.
Proof: Statement proof.
RejectionReason: Reason why a statement was rejected from the store.
SignatureVerificationResult: Result returned by Statement::verify_signature
StatementEvent: An item returned by the statement subscription stream.
SubmitResult: Statement submission outcome
TopicFilter: Filter for subscribing to statements with different topics.

MAX_ANY_TOPICS: MatchAny allows to provide a list of topics match against. This is the maximum number of topics allowed.
MAX_TOPICS: Total number of topic fields allowed in a statement and in MatchAll filters.
STATEMENT_ALLOWANCE_PREFIX: Storage key prefix for per-account statement allowances.

decrease_allowance_by: Decrease the statement allowance by the given amount.
get_allowance: Get the statement allowance for the given account.
hash_encoded: Returns blake2-256 hash for the encoded statement.
increase_allowance_by: Increase the statement allowance by the given amount.
statement_allowance_key: Constructs a per-account statement allowance storage key.

AccountId: Account id
BlockHash: Block hash.
Channel: Identifier of a per-account communication channel, used for message replacement.
DecryptionKey: Decryption key identifier.
Hash: Statement hash.
Result: Result type for Error