difficulty set to 0 for proof of stake

libs/remix-lib/src/execution/txRunnerVM.ts

@@ -1,6 +1,6 @@
 'use strict'
-import BN from 'bn.js'
 import { RunBlockResult, RunTxResult } from '@ethereumjs/vm'
+import { ConsensusType } from '@ethereumjs/common'
 import { Transaction, FeeMarketEIP1559Transaction } from '@ethereumjs/tx'
 import { Block } from '@ethereumjs/block'
 import { bufferToHex, Address } from '@ethereumjs/util'
@@ -106,13 +106,14 @@ export class TxRunnerVM {
 
       const coinbases = ['0x0e9281e9c6a0808672eaba6bd1220e144c9bb07a', '0x8945a1288dc78a6d8952a92c77aee6730b414778', '0x94d76e24f818426ae84aa404140e8d5f60e10e7e']
       const difficulties = [69762765929000, 70762765929000, 71762765929000]
-
+      const difficulty = this.commonContext.consensusType() === ConsensusType.ProofOfStake ? 0 : difficulties[self.blockNumber % difficulties.length]
+      
       const block = Block.fromBlockData({
         header: {
           timestamp: new Date().getTime() / 1000 | 0,
           number: self.blockNumber,
           coinbase: coinbases[self.blockNumber % coinbases.length],
-          difficulty: difficulties[self.blockNumber % difficulties.length],
+          difficulty,
           gasLimit,
           baseFeePerGas: EIP1559 ? '0x1' : undefined
         },