Missing `impl From<Block> for BlockHeader`

[recmo]

trafficstars

Surprisingly, there is no way to get the header for a block. This is useful to homogenize values between Eth::block to EthSubscribe::subscribe_new_heads.

impl From<Block<H256>> for BlockHeader {
    fn from(block: Block<H256>) -> BlockHeader {
        BlockHeader {
            hash:              block.hash,
            parent_hash:       block.parent_hash,
            uncles_hash:       block.uncles_hash,
            author:            block.author,
            state_root:        block.state_root,
            transactions_root: block.transactions_root,
            receipts_root:     block.receipts_root,
            number:            block.number,
            gas_used:          block.gas_used,
            gas_limit:         block.gas_limit,
            extra_data:        block.extra_data,
            logs_bloom:        block.logs_bloom.unwrap_or_default(),
            timestamp:         block.timestamp,
            difficulty:        block.difficulty,
            mix_hash:          block.mix_hash,
            nonce:             block.nonce,
        }
    }
}

[tomusdrw]

PRs welcome :)