| block_epoch | long | Epoch number when the block containing the attestation was proposed. |
| block_slot | long | Slot number within the epoch when the block containing the attestation was proposed. |
| block_time | timestamp | Timestamp when the block containing the attestation was included in the chain. |
| block_date | date | Date corresponding to the block_time. |
| signature | binary | BLS signature verifying the attestation’s authenticity. |
| aggregation_bits | binary | Bitlist indicating participating validators in the committee. |
| beacon_block_root | binary | Root hash of the Beacon Chain block that the attestation votes for. |
| index | long | Committee index at the assigned slot for the attestation. |
| slot | long | Slot number to which the attestation pertains. |
| source_epoch | long | Epoch of the last justified checkpoint referred to as the source in the FFG vote. |
| source_root | binary | Root hash of the Beacon Chain block at the source checkpoint epoch. |
| target_epoch | long | Epoch that the attestation targets in its FFG vote. |
| target_root | binary | Root hash of the Beacon Chain block at the target checkpoint epoch. |
