Block structure & serialization
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A zkopru block is submitted to the layer1 in a serialized form. Then, the checksum of the proposal becomes the proposal ID and is used for the challenge system.
The zkopru block includes a header and a body.
Edit diagram here
The first 340 bytes of the data should be the block header. The block header contains the following data:
Property
type
Proposer's address
address
Parent block hash
bytes32
Fee
uint256
Latest UTXO tree's root
uint256
Latest UTXO tree's leaf index
uint256
Nullifier tree's root
bytes32
Latest withdrawal tree's root
uint256
Latest withdrawal tree's leaf index
uint256
Transactions' root
bytes32
Deposits' root
bytes32
Migrations' root
bytes32
A block body consists of transactions, mass deposits, and mass migrations. Moreover, the block header should contain correct information from the body. If the header does not have the correct value, the proposer will get slashed through the challenge system.
