Glossary Term
Proof of History (PoH)
Proof of History (PoH) is Solana’s groundbreaking consensus innovation—a cryptographic clock that timestamps transactions, significantly speeding up validation and improving scalability by establishing a verifiable order of events before executing the core security consensus.
Beginner
Solana
Crypto Terminology
Proof of History (PoH): what is it?
Examples
- 1
Each transaction on Solana is timestamped with PoH, allowing decentralized exchanges to settle trades instantly.
- 2
In rollup protocols (such as Rome), PoH sequences thousands of rollup transactions rapidly and securely.
- 3
PoH ensures airdrop or event “snapshots” are precisely timed, enabling fair and auditable participation.
Common Use Cases
Supporting high-frequency DeFi trades and yield strategies.
NFT minting and gaming actions that require sub-second confirmation.
Payroll, event tickets, or oracle feeds needing proof of historical event sequence.
Pro Tips
💡
Developers building on Solana benefit from faster and cheaper smart contract execution due to PoH’s efficiency.