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Implement EIP4788: Beacon block root in EVM (#2810)
* common: add 4788 * evm: add beaconroot * block/header: add 4788 * vm: add 4788 * common/evm/vm: 4788 spec updates * evm: fix build [no ci] * block: add 4788 tests * vm: update 4788 + tests * Update packages/block/src/header.ts [no ci] Co-authored-by: g11tech <gajinder@g11.in> * block/vm: update beaconRoot property * block: fix test * add validation in from values array --------- Co-authored-by: g11tech <gajinder@g11.in>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| import { Chain, Common, Hardfork } from '@ethereumjs/common' | ||
| import { KECCAK256_RLP, bytesToHex, zeros } from '@ethereumjs/util' | ||
| import { assert, describe, it } from 'vitest' | ||
|
|
||
| import { BlockHeader } from '../src/header.js' | ||
| import { Block } from '../src/index.js' | ||
|
|
||
| describe('EIP4788 header tests', () => { | ||
| it('should work', () => { | ||
| const earlyCommon = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.Istanbul }) | ||
| const common = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.Cancun, eips: [4788] }) | ||
|
|
||
| assert.throws( | ||
| () => { | ||
| BlockHeader.fromHeaderData( | ||
| { | ||
| parentBeaconBlockRoot: zeros(32), | ||
| }, | ||
| { | ||
| common: earlyCommon, | ||
| } | ||
| ) | ||
| }, | ||
| 'A parentBeaconBlockRoot for a header can only be provided with EIP4788 being activated', | ||
| undefined, | ||
| 'should throw when setting parentBeaconBlockRoot with EIP4788 not being activated' | ||
| ) | ||
|
|
||
| assert.throws( | ||
| () => { | ||
| BlockHeader.fromHeaderData( | ||
| { | ||
| dataGasUsed: 1n, | ||
| }, | ||
| { | ||
| common: earlyCommon, | ||
| } | ||
| ) | ||
| }, | ||
| 'data gas used can only be provided with EIP4844 activated', | ||
| undefined, | ||
| 'should throw when setting dataGasUsed with EIP4844 not being activated' | ||
| ) | ||
| assert.doesNotThrow(() => { | ||
| BlockHeader.fromHeaderData( | ||
| { | ||
| excessDataGas: 0n, | ||
| dataGasUsed: 0n, | ||
| parentBeaconBlockRoot: zeros(32), | ||
| }, | ||
| { | ||
| common, | ||
| skipConsensusFormatValidation: true, | ||
| } | ||
| ) | ||
| }, 'correctly instantiates an EIP4788 block header') | ||
|
|
||
| const block = Block.fromBlockData( | ||
| { | ||
| header: BlockHeader.fromHeaderData({}, { common }), | ||
| }, | ||
| { common, skipConsensusFormatValidation: true } | ||
| ) | ||
| assert.equal( | ||
| block.toJSON().header?.parentBeaconBlockRoot, | ||
| bytesToHex(KECCAK256_RLP), | ||
| 'JSON output includes excessDataGas' | ||
| ) | ||
| }) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| { | ||
| "name": "EIP-4788", | ||
| "number": 4788, | ||
| "comment": "Beacon block root in the EVM", | ||
| "url": "https://eips.ethereum.org/EIPS/eip-4788", | ||
| "status": "Draft", | ||
| "minimumHardfork": "cancun", | ||
| "requiredEIPs": [], | ||
| "gasConfig": {}, | ||
| "gasPrices": { | ||
| "beaconrootCost": { | ||
| "v": 4200, | ||
| "d": "Gas cost when calling the beaconroot stateful precompile" | ||
| } | ||
| }, | ||
| "vm": { | ||
| "historicalRootsLength": { | ||
| "v": 98304, | ||
| "d": "The modulo parameter of the beaconroot ring buffer in the beaconroot statefull precompile" | ||
| } | ||
| }, | ||
| "pow": {} | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| import { | ||
| Address, | ||
| bigIntToBytes, | ||
| bytesToBigInt, | ||
| setLengthLeft, | ||
| short, | ||
| zeros, | ||
| } from '@ethereumjs/util' | ||
|
|
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| import { type ExecResult, OOGResult } from '../evm.js' | ||
| import { ERROR, EvmError } from '../exceptions.js' | ||
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| import type { PrecompileInput } from './types.js' | ||
|
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| const address = Address.fromString('0x000000000000000000000000000000000000000b') | ||
|
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| export async function precompile0b(opts: PrecompileInput): Promise<ExecResult> { | ||
| const data = opts.data | ||
|
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| const gasUsed = opts.common.param('gasPrices', 'beaconrootCost') | ||
| if (opts._debug !== undefined) { | ||
| opts._debug( | ||
| `Run BEACONROOT (0x0B) precompile data=${short(opts.data)} length=${ | ||
| opts.data.length | ||
| } gasLimit=${opts.gasLimit} gasUsed=${gasUsed}` | ||
| ) | ||
| } | ||
|
|
||
| if (opts.gasLimit < gasUsed) { | ||
| if (opts._debug !== undefined) { | ||
| opts._debug(`BEACONROOT (0x0B) failed: OOG`) | ||
| } | ||
| return OOGResult(opts.gasLimit) | ||
| } | ||
|
|
||
| if (data.length < 32) { | ||
| return { | ||
| returnValue: new Uint8Array(0), | ||
| executionGasUsed: gasUsed, | ||
| exceptionError: new EvmError(ERROR.INVALID_INPUT_LENGTH), | ||
| } | ||
| } | ||
|
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| const timestampInput = bytesToBigInt(data.slice(0, 32)) | ||
| const historicalRootsLength = BigInt(opts.common.param('vm', 'historicalRootsLength')) | ||
|
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| const timestampIndex = timestampInput % historicalRootsLength | ||
| const recordedTimestamp = await opts.stateManager.getContractStorage( | ||
| address, | ||
| setLengthLeft(bigIntToBytes(timestampIndex), 32) | ||
| ) | ||
|
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| if (bytesToBigInt(recordedTimestamp) !== timestampInput) { | ||
| return { | ||
| executionGasUsed: gasUsed, | ||
| returnValue: zeros(32), | ||
| } | ||
| } | ||
| const timestampExtended = timestampIndex + historicalRootsLength | ||
| const returnData = setLengthLeft( | ||
| await opts.stateManager.getContractStorage( | ||
| address, | ||
| setLengthLeft(bigIntToBytes(timestampExtended), 32) | ||
| ), | ||
| 32 | ||
| ) | ||
|
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| if (opts._debug !== undefined) { | ||
| opts._debug(`BEACONROOT (0x0B) return data=${short(returnData)}`) | ||
| } | ||
|
|
||
| return { | ||
| executionGasUsed: gasUsed, | ||
| returnValue: returnData, | ||
| } | ||
| } |
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