Blocks

Blocks are data structures that store accounts’ state transitions in the blockchain, global state fields, and information related to the agreement protocol.

A block defines a state transition of the Ledger.

Algorand block size is \( 5 \) MB.

Each block consists of a header and a body.

• The header contains metadata such as details about the block itself, the current round, various hashes, rewards, etc.,

• The body holds transaction data and account updates.

For further details on the block header, refer to the Ledger normative specification.

⚙️ IMPLEMENTATION

Block header reference implementation.

The Ledger package in the go-algorand reference implementation includes functions to effectively manage and interact with blocks.

Blocks are assembled in two steps: first by the MakeBlock function and then by the WithSeed.

⚙️ IMPLEMENTATION

MakeBlock reference implementation.

WithSeed reference implementation.

The following sections provide a brief explanation and examples for each field in the block structure.

For a formal specification of these fields, refer to the Ledger normative specification.