> ## Documentation Index
> Fetch the complete documentation index at: https://docs.allium.so/llms.txt
> Use this file to discover all available pages before exploring further.

# Blocks

Blocks are the building blocks of blockchains and rollups.

A block contains transactions which will alter the state of an EVM system incrementally. Transaction within a block can only be executed one after the other, not in parallel.

<Info>
  Several columns may only be applicable for specific EVM-compatible blockchains. The list of columns present in the table is not exhaustive.
</Info>

### Table Columns

Unique Key: `number`

| Column Name         | Data Type         | Description                                                                                                                                    |
| ------------------- | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
| timestamp           | TIMESTAMP\_NTZ(9) | The unix timestamp for when the block was collated.                                                                                            |
| number              | BIGINT            | The length of the chain, in blocks.                                                                                                            |
| hash                | VARCHAR           | Unique identifier of a block.                                                                                                                  |
| parent\_hash        | VARCHAR           | Unique identifier of the block preceding this block, also known as the parent block.                                                           |
| nonce               | VARCHAR           | The hash of the generated proof-of-work. null if pending                                                                                       |
| sha3\_uncles        | VARCHAR           | An array of uncle hashes.                                                                                                                      |
| logs\_bloom         | VARCHAR           | The bloom filter for the logs of the block.                                                                                                    |
| transactions\_root  | VARCHAR           | The root of the transaction trie of the block.                                                                                                 |
| state\_root         | VARCHAR           | The root of the final state trie of the block.                                                                                                 |
| receipts\_root      | VARCHAR           | The root of the receipts trie of the block.                                                                                                    |
| miner               | VARCHAR           | The address of the beneficiary to whom the mining rewards were given.                                                                          |
| difficulty          | BIGINT            | The integer of the difficulty for this block.                                                                                                  |
| total\_difficulty   | VARCHAR           | The integer of the total difficulty of the chain until this block.                                                                             |
| size                | BIGINT            | The size of the block, in bytes, as determined by the gas\_limit.                                                                              |
| extra\_data         | VARCHAR           | The "extra data" field of this block.                                                                                                          |
| gas\_limit          | BIGINT            | Gas limit of the current block.                                                                                                                |
| gas\_used           | BIGINT            | Total gas used in the block.                                                                                                                   |
| transaction\_count  | BIGINT            | Number of transactions included in this block.                                                                                                 |
| base\_fee\_per\_gas | BIGINT            | Post London Upgrade (EIP1559), this represents the minimum gas\_used required for a transaction to be included in a block. Represented in wei. |
| send\_root          | VARCHAR           | The root hash of send operations.                                                                                                              |
| created\_at         | TIMESTAMP\_NTZ(9) | Timestamp when the record was created.                                                                                                         |
| updated\_at         | TIMESTAMP\_NTZ(9) | Timestamp when the record was last updated.                                                                                                    |