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Update docs about block header fields #76

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Aug 29, 2023
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Update docs about block header fields #76

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16 changes: 9 additions & 7 deletions src/content/docs/en/technology/chain/blocks.mdx
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Expand Up @@ -16,22 +16,24 @@ The block header in Scroll mirrors the structure of Ethereum's. However, certain
| Field | Description |
| ------------------- | ------------------------------------------------------------------ |
| `parentHash` | The hash of the parent block. |
| `uncleHash` | Always 0. |
| `coinbase` | Pre-deployed fee vault contract address `0x5300000000000000000000000000000000000005`. |
| `uncleHash` | Always `keccak256(rlp([]))`. |
| `coinbase` | Fees are collected to the pre-deployed fee vault contract address `0x5300000000000000000000000000000000000005`. In most cases, the RPC return field `"miner"` is the zero-address `0x0000000000000000000000000000000000000000`. |
| `stateRoot` | The root hash of the state trie. It is the Poseidon |
| `transactionsRoot ` | The hash of the transaction trie. |
| `receiptsRoot ` | The hash of the transaction receipts trie. |
| `logsBloom` | The data structure containing event logs |
| `difficulty` | Always 0. |
| `transactionsRoot ` | The root hash of the transaction trie. |
| `receiptsRoot ` | The root hash of the transaction receipts trie. |
| `logsBloom` | The data structure containing event logs. |
| `difficulty` | Always 1 or 2. |
| `number` | The block number. |
| `gasLimit` | The maximum gas allowed in the block. |
| `gasUsed` | The gas used in the block. |
| `timestamp` | The block time. |
| `extraData` | Arbitrary additional data. |
| `extraData` | Signature by the block's signer, followd by arbitrary additional data. |
| `mixHash` | Always 0. |
| `nonce` | Always 0. |
| `baseFee` | Currently empty in Scroll because we haven't enabled the EIP-1559. |

## Block Time

Block time refers to the interval between two consecutive blocks. In Scroll, the block time is set at 3s. A reduced block time elevates the user experience and augments the Scroll chain's scalability.

The 3 second block time is maintained on a best effort basis, it is not guaranteed or enforced by the protocol.