packages: add requests hash to genesis block (#3771)

* packages: add requests hash to genesis block.

* Update packages/util/src/constants.ts

Co-authored-by: Jochem Brouwer <[email protected]>

* Update packages/util/src/constants.ts

Co-authored-by: Jochem Brouwer <[email protected]>

* packages: integrate suggestions.

* Update packages/util/src/constants.ts

---------

Co-authored-by: Jochem Brouwer <[email protected]>

Author: spencer-tb

packages/blockchain/src/blockchain.ts

@@ -5,6 +5,7 @@ import {
   BIGINT_1,
   BIGINT_8,
   KECCAK256_RLP,
+  SHA256_EMPTY_RH,
   Lock,
   MapDB,
   bigIntToHex,
@@ -1313,6 +1314,7 @@ export class Blockchain implements BlockchainInterface {
       number: 0,
       stateRoot,
       withdrawalsRoot: common.isActivatedEIP(4895) ? KECCAK256_RLP : undefined,
+      requestsHash: common.isActivatedEIP(7685) ? SHA256_EMPTY_RH : undefined,
     }
     if (common.consensusType() === 'poa') {
       if (common.genesis().extraData) {

packages/common/src/types.ts

@@ -52,6 +52,7 @@ export interface GenesisBlockConfig {
   extraData: PrefixedHexString
   baseFeePerGas?: PrefixedHexString
   excessBlobGas?: PrefixedHexString
+  requestsHash?: PrefixedHexString
 }
 
 export interface HardforkTransitionConfig {

packages/common/src/utils.ts

@@ -38,6 +38,7 @@ function parseGethParams(json: any) {
     coinbase,
     baseFeePerGas,
     excessBlobGas,
+    requestsHash,
     extraData: unparsedExtraData,
     nonce: unparsedNonce,
     timestamp: unparsedTimestamp,
@@ -50,6 +51,7 @@ function parseGethParams(json: any) {
     coinbase: PrefixedHexString
     baseFeePerGas: PrefixedHexString
     excessBlobGas: PrefixedHexString
+    requestsHash: PrefixedHexString
     extraData: string
     nonce: string
     timestamp: string
@@ -105,6 +107,7 @@ function parseGethParams(json: any) {
       coinbase,
       baseFeePerGas,
       excessBlobGas,
+      requestsHash,
     },
     hardfork: undefined as string | undefined,
     hardforks: [] as ConfigHardfork[],

packages/util/src/constants.ts

@@ -67,6 +67,11 @@ export const KECCAK256_RLP = hexToBytes(KECCAK256_RLP_S)
 
 export const SHA256_NULL = sha256(new Uint8Array())
 
+/**
+ * SHA-256 hash of the RLP of an empty requests hash
+ */
+export const SHA256_EMPTY_RH = sha256(new Uint8Array([0, 1, 2]))
+
 /**
  *  RLP encoded empty string
  */