Core Protocolentry
Entry
An ordered unit within a block containing a mix of PoH ticks and transaction batches. Each entry includes a PoH hash, a count of hashes since the previous entry, and zero or more transactions. Entries without transactions are tick entries that advance the PoH clock; entries with transactions prove those transactions occurred between two points in time.
Related terms
3Core Protocol
Block
A set of entries produced by a leader during a single slot. A block contains transactions bundled into entries, each wit...
Solana Programming
Transaction
An atomic unit of execution containing one or more instructions, a recent blockhash, and one or more signatures. All ins...
Core Protocol
Proof of History (PoH)
A clock mechanism that cryptographically proves the passage of time between events. PoH uses a sequential SHA-256 hash c...