HomeEIPs
EIPsEIP-3045
EIP-3045

Adds `baseFee` to `eth_getUncleByBlockHashAndIndex`

StagnantStandards Track: Interface
Created: 2020-10-14
Requires: EIP-1474, EIP-1559
Abdelhamid Bakhta (@abdelhamidbakhta)
DiscussionsOriginal linkEdit
1 min read

The proposal of EIP-3045 is to add the `baseFee` field to the `eth_getUncleByBlockHashAndIndex` endpoint in Ethereum.

Video
Anyone may contribute to propose contents.
Go propose
Original

Simple Summary

Add basefee field to eth_getUncleByBlockHashAndIndex RPC endpoint response.

Abstract

Adds baseFee property to the eth_getUncleByBlockHashAndIndex JSON-RPC request result object. This property will contain the value of the base fee for any block after the EIP-1559 fork.

Motivation

EIP-1559 introduces a base fee per gas in protocol. This value is maintained under consensus as a new field in the block header structure. Users may need value of the base fee at a given block. Base fee value is important to make gas price predictions more accurate.

Specification

eth_getUncleByBlockHashAndIndex

Description

Returns information about an uncle specified by block hash and uncle index position Every block returned by this endpoint whose block number is before the EIP-1559 fork block MUST NOT include a baseFee field. Every block returned by this endpoint whose block number is on or after the EIP-1559 fork block MUST include a baseFee field.

Parameters

Parameters remain unchanged.

Returns

For the full specification of eth_getUncleByBlockHashAndIndex see EIP-1474. Add a new JSON field to the result object for block headers containing a base fee (post EIP-1559 fork block).

  • {Quantity} baseFee - base fee for this block

Example

# Request curl -X POST --data '{ "id": 1559, "jsonrpc": "2.0", "method": "eth_getUncleByBlockHashAndIndex", "params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"] }' <url> # Response { "id": 1559, "jsonrpc": "2.0", "result": { "difficulty": "0x027f07", "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000", "baseFee": "0x7" "gasLimit": "0x9f759", "gasUsed": "0x9f759", "hash": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", "logsBloom": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", "miner": "0x4e65fda2159562a496f9f3522f89122a3088497a", "nonce": "0xe04d296d2460cfb8472af2c5fd05b5a214109c25688d3704aed5484f9a7792f2", "number": "0x1b4", "parentHash": "0x9646252be9520f6e71339a8df9c55e4d7619deeb018d2a3f2d21fc165dde5eb5", "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347", "size": "0x027f07", "stateRoot": "0xd5855eb08b3387c0af375e9cdb6acfc05eb8f519e419b874b6ff2ffda7ed1dff", "timestamp": "0x54e34e8e" "totalDifficulty": "0x027f07", "transactions": [] "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421", "uncles": [] } }

Rationale

The addition of a single parameter instead of introducing a whole new endpoint was the simplest change that would be easiest to get integrated. For backward compatibility we decided to not include the base fee in the response for pre-1559 blocks.

Backwards Compatibility

Backwards compatible. Calls related to block prior to EIP-1559 fork block will omit the base fee field in the response.

Security Considerations

The added field (baseFee) is informational and does not introduce technical security issues.

Copyright and related rights waived via CC0.

Further reading
Anyone may contribute to propose contents.
Go propose
Adopted by projects
Anyone may contribute to propose contents.
Go propose

Not miss a beat of EIPs' update?

Subscribe EIPs Fun to receive the latest updates of EIPs Good for Buidlers to follow up.

View all
Serve EIP builders, scale Ethereum.
Resources
GitHub
Supported by