ethereumjs-monorepo

Interface: BlockOptions

An object to set to which blockchain the blocks and their headers belong. This could be specified using a Common object, or chain and hardfork. Defaults to mainnet without specifying a hardfork.

Properties

calcDifficultyFromHeader?

optional calcDifficultyFromHeader: BlockHeader

Defined in: types.ts:65

If a preceding BlockHeader (usually the parent header) is given the preceding header will be used to calculate the difficulty for this block and the calculated difficulty takes precedence over a provided static difficulty value.

Note that this option has no effect on networks other than PoW/Ethash networks (respectively also deactivates on the Merge HF switching to PoS/Casper).

common?

optional common: Common

Defined in: types.ts:32

A Common object defining the chain and the hardfork a block/block header belongs to.

Object will be internally copied so that tx behavior don’t incidentally change on future HF changes.

Default: Common object set to mainnet and the HF currently defined as the default hardfork in the Common class.

Current default hardfork: merge

freeze?

optional freeze: boolean

Defined in: types.ts:77

A block object by default gets frozen along initialization. This gives you strong additional security guarantees on the consistency of the block parameters. It also enables block hash caching when the hash() method is called multiple times.

If you need to deactivate the block freeze - e.g. because you want to subclass block and add additional properties - it is strongly encouraged that you do the freeze yourself within your code instead.

Default: true

params?

optional params: ParamsDict

Defined in: types.ts:56

Block parameters sorted by EIP can be found in the exported paramsBlock dictionary, which is internally passed to the associated @ethereumjs/common instance which manages parameter selection based on the hardfork and EIP settings.

This option allows providing a custom set of parameters. Note that parameters get fully overwritten, so you need to extend the default parameter dict to provide the full parameter set.

It is recommended to deep-clone the params object for this to avoid side effects:

const params = JSON.parse(JSON.stringify(paramsBlock))
params['1']['minGasLimit'] = 3000 // 5000

setHardfork?

optional setHardfork: boolean

Defined in: types.ts:39

Set the hardfork either by timestamp (for HFs from Shanghai onwards) or by block number for older Hfs.

Default: false (HF is set to whatever default HF is set by the Common instance)

skipConsensusFormatValidation?

optional skipConsensusFormatValidation: boolean

Defined in: types.ts:81

Skip consensus format validation checks on header if set. Defaults to false.