On-Chain
blockchain · transaction
Recorded or executed directly in transactions governed by a blockchain's base-layer rules.
On-chain activity is represented in base-layer transactions and becomes part of the accepted ledger when included in blocks. Payments, token transfers, contract state changes, and data commitments can all be on-chain.
On-chain records inherit the chain's validation, finality, privacy, capacity, and fee properties. They are not automatically correct, private, irreversible, or free from application and contract risk.
Confirmed data can remain reproducible from block history even when ordinary nodes prune old block files. Indexers and archival services may be needed for convenient historical queries, and reorganizations can change recent accepted history.
Related terms
Layer-1
→The base blockchain layer that defines consensus, transaction validity, settlement, and data availability.
blockchain · architecture
Off-chain
→Activity that occurs outside the base blockchain, often for speed, privacy, or cost efficiency.
blockchain
Transaction
→A serialized state transition that a blockchain can validate, relay, and include in a block.
blockchain · technical
Confirmations
→The count of blocks confirming a transaction, usually including the block that first contains it.
security · blockchain