evm: add blobgasfee eip 7516 (#3035)

* evm: add blobgasfee eip 7516 * Update packages/evm/src/interpreter.ts Co-authored-by: acolytec3 <17355484+acolytec3@users.noreply.github.com> * Update packages/common/src/hardforks.ts Co-authored-by: Scorbajio <indigophi@protonmail.com> * update min hardfork * add to supported eips * update minimum hf to cancun * update min hf to paris same as 4844 --------- Co-authored-by: acolytec3 <17355484+acolytec3@users.noreply.github.com> Co-authored-by: Scorbajio <indigophi@protonmail.com>
ethereumjs · Sep 19, 2023 · b6eb329 · b6eb329
1 parent bd70544
commit b6eb329
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Showing 8 changed files with 82 additions and 4 deletions.
diff --git a/packages/common/src/eips.ts b/packages/common/src/eips.ts
@@ -471,4 +471,17 @@ export const EIPs: EIPsDict = {
     minimumHardfork: Hardfork.London,
     requiredEIPs: [],
   },
+  7516: {
+    comment: 'BLOBBASEFEE opcode',
+    url: 'https://eips.ethereum.org/EIPS/eip-7516',
+    status: Status.Draft,
+    minimumHardfork: Hardfork.Paris,
+    requiredEIPs: [4844],
+    gasPrices: {
+      blobbasefee: {
+        v: 2,
+        d: 'Gas cost of the BLOBBASEFEE opcode',
+      },
+    },
+  },
 }
diff --git a/packages/common/src/hardforks.ts b/packages/common/src/hardforks.ts
@@ -834,9 +834,9 @@ export const hardforks: HardforksDict = {
   cancun: {
     name: 'cancun',
     comment:
-      'Next feature hardfork after the shanghai having proto-danksharding EIP 4844 blobs (still WIP hence not for production use), transient storage opcodes, parent beacon block root availability in EVM and selfdestruct only in same transaction',
+      'Next feature hardfork after shanghai, includes proto-danksharding EIP 4844 blobs (still WIP hence not for production use), transient storage opcodes, parent beacon block root availability in EVM, selfdestruct only in same transaction, and blob base fee opcode',
     url: 'https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/cancun.md',
     status: Status.Final,
-    eips: [1153, 4844, 4788, 5656, 6780],
+    eips: [1153, 4844, 4788, 5656, 6780, 7516],
   },
 }
diff --git a/packages/evm/src/evm.ts b/packages/evm/src/evm.ts
@@ -162,7 +162,7 @@ export class EVM implements EVMInterface {
     // Supported EIPs
     const supportedEIPs = [
       1153, 1559, 2315, 2565, 2718, 2929, 2930, 3074, 3198, 3529, 3540, 3541, 3607, 3651, 3670,
-      3855, 3860, 4399, 4895, 4788, 4844, 5133, 5656, 6780,
+      3855, 3860, 4399, 4895, 4788, 4844, 5133, 5656, 6780, 7516,
     ]
 
     for (const eip of this.common.eips()) {
@@ -966,7 +966,7 @@ export function EvmErrorResult(error: EvmError, gasUsed: bigint): ExecResult {
   }
 }
 
-function defaultBlock(): Block {
+export function defaultBlock(): Block {
   return {
     header: {
       number: BigInt(0),
@@ -977,6 +977,7 @@ function defaultBlock(): Block {
       prevRandao: zeros(32),
       gasLimit: BigInt(0),
       baseFeePerGas: undefined,
+      getBlobGasPrice: () => undefined,
     },
   }
 }
diff --git a/packages/evm/src/interpreter.ts b/packages/evm/src/interpreter.ts
@@ -760,6 +760,18 @@ export class Interpreter {
     return baseFee
   }
 
+  /**
+   * Returns the Blob Base Fee of the block as proposed in [EIP-7516](https;//eips.etheruem.org/EIPS/eip-7516)
+   */
+  getBlobBaseFee(): bigint {
+    const blobBaseFee = this._env.block.header.getBlobGasPrice()
+    if (blobBaseFee === undefined) {
+      // Sanity check
+      throw new Error('Block has no Blob Base Fee')
+    }
+    return blobBaseFee
+  }
+
   /**
    * Returns the chain ID for current chain. Introduced for the
    * CHAINID opcode proposed in [EIP-1344](https://eips.ethereum.org/EIPS/eip-1344).

diff --git a/packages/evm/src/opcodes/codes.ts b/packages/evm/src/opcodes/codes.ts
@@ -313,6 +313,12 @@ const eipOpcodes: { eip: number; opcodes: OpcodeEntry }[] = [
       0x5e: { name: 'MCOPY', isAsync: false, dynamicGas: true },
     },
   },
+  {
+    eip: 7516,
+    opcodes: {
+      0x4a: { name: 'BLOBBASEFEE', isAsync: false, dynamicGas: false },
+    },
+  },
 ]
 
 /**

diff --git a/packages/evm/src/opcodes/functions.ts b/packages/evm/src/opcodes/functions.ts
@@ -650,6 +650,13 @@ export const handlers: Map<number, OpHandler> = new Map([
       }
     },
   ],
+  // 0x4a: BLOBBASEFEE
+  [
+    0x4a,
+    function (runState) {
+      runState.stack.push(runState.interpreter.getBlobBaseFee())
+    },
+  ],
   // 0x50 range - 'storage' and execution
   // 0x50: POP
   [

diff --git a/packages/evm/src/types.ts b/packages/evm/src/types.ts
@@ -338,6 +338,7 @@ export type Block = {
     prevRandao: Uint8Array
     gasLimit: bigint
     baseFeePerGas?: bigint
+    getBlobGasPrice(): bigint | undefined
   }
 }
 

diff --git a/packages/evm/test/runCall.spec.ts b/packages/evm/test/runCall.spec.ts
@@ -3,6 +3,7 @@ import {
   Account,
   Address,
   MAX_UINT64,
+  bytesToBigInt,
   bytesToHex,
   concatBytes,
   hexToBytes,
@@ -13,6 +14,7 @@ import { keccak256 } from 'ethereum-cryptography/keccak.js'
 import { assert, describe, it } from 'vitest'
 
 import * as genesisJSON from '../../client/test/testdata/geth-genesis/eip4844.json'
+import { defaultBlock } from '../src/evm.js'
 import { ERROR } from '../src/exceptions.js'
 import { EVM } from '../src/index.js'
 
@@ -602,6 +604,42 @@ describe('RunCall tests', () => {
     )
   })
 
+  it('runCall() => use BLOBBASEFEE opcode from EIP 7516', async () => {
+    // setup the evm
+    const common = Common.fromGethGenesis(genesisJSON, {
+      chain: 'custom',
+      hardfork: Hardfork.Cancun,
+    })
+    const evm = new EVM({
+      common,
+    })
+
+    const BLOBBASEFEE_OPCODE = 0x4a
+    assert.equal(
+      evm.getActiveOpcodes().get(BLOBBASEFEE_OPCODE)!.name,
+      'BLOBBASEFEE',
+      'Opcode 0x4a named BLOBBASEFEE'
+    )
+
+    const block = defaultBlock()
+    block.header.getBlobGasPrice = () => BigInt(119)
+
+    // setup the call arguments
+    const runCallArgs: EVMRunCallOpts = {
+      gasLimit: BigInt(0xffffffffff),
+      // calldata -- retrieves the blobgas and returns it from memory
+      data: hexToBytes('0x4a60005260206000F3'),
+      block,
+    }
+    const res = await evm.runCall(runCallArgs)
+    assert.equal(
+      bytesToBigInt(unpadBytes(res.execResult.returnValue)),
+      BigInt(119),
+      'retrieved correct gas fee'
+    )
+    assert.equal(res.execResult.executionGasUsed, BigInt(6417), 'correct blob gas fee (2) charged')
+  })
+
   it('step event: ensure EVM memory and not internal memory gets reported', async () => {
     const common = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.Berlin })
     const evm = new EVM({