AA-453: Support EIP-7702 tuples in ERC-4337 bundlers

package.json

@@ -20,7 +20,7 @@
     "runop": "yarn --cwd packages/bundler runop",
     "runop-goerli": "yarn runop --network goerli --unsafe",
     "create-all-deps": "jq '.dependencies,.devDependencies' packages/*/package.json |sort  -u > all.deps",
-    "depcheck": "lerna exec --no-bail --stream --parallel -- npx depcheck --ignores @account-abstraction/contracts,@openzeppelin/contracts,@uniswap/v3-periphery",
+    "depcheck": "lerna exec --no-bail --stream --parallel --ignore \"@account-abstraction/contracts\" -- npx depcheck --ignores=\"@account-abstraction/contracts,@openzeppelin/contracts,@uniswap/v3-periphery\"",
     "hardhat-node": "lerna run hardhat-node --stream --no-prefix --",
     "hardhat-deploy": "lerna run hardhat-deploy --stream --no-prefix --",
     "lerna-clear": "lerna run clear",
@@ -39,6 +39,9 @@
     "ci": "env && yarn depcheck && yarn preprocess && yarn lerna-test"
   },
   "dependencies": {
+    "@ethereumjs/common": "^5.0.0-alpha.1",
+    "@ethereumjs/tx": "^6.0.0-alpha.1",
+    "@ethereumjs/util": "^10.0.0-alpha.1",
     "@typescript-eslint/eslint-plugin": "^5.33.0",
     "@typescript-eslint/parser": "^5.33.0",
     "depcheck": "^1.4.3",
@@ -48,7 +51,7 @@
     "eslint-plugin-n": "^15.2.4",
     "eslint-plugin-promise": "^6.0.0",
     "lerna": "^5.4.0",
-    "typescript": "^4.7.4",
+    "typescript": "^5.6.2",
     "webpack": "^5.74.0",
     "webpack-cli": "^4.10.0"
   },

packages/bundler/package.json

@@ -28,7 +28,10 @@
     "@account-abstraction/sdk": "^0.7.0",
     "@account-abstraction/utils": "^0.7.0",
     "@account-abstraction/validation-manager": "^0.7.0",
+    "@ethereumjs/common": "^5.0.0-alpha.1",
     "@ethereumjs/rlp": "^5.0.2",
+    "@ethereumjs/tx": "^6.0.0-alpha.1",
+    "@ethereumjs/util": "^10.0.0-alpha.1",
     "@ethersproject/abi": "^5.7.0",
     "@ethersproject/providers": "^5.7.0",
     "@types/cors": "^2.8.12",

packages/bundler/src/BundlerConfig.ts

@@ -31,6 +31,7 @@ export interface BundlerConfig {
   rip7560Mode: string
   gethDevMode: boolean
 
+  eip7702Support: boolean
   // Config overrides for PreVerificationGas calculation
   fixedGasOverhead?: number
   perUserOpGasOverhead?: number
@@ -68,6 +69,7 @@ export const BundlerConfigShape = {
   rip7560: ow.boolean,
   rip7560Mode: ow.string.oneOf(['PULL', 'PUSH']),
   gethDevMode: ow.boolean,
+  eip7702Support: ow.boolean,
 
   // Config overrides for PreVerificationGas calculation
   fixedGasOverhead: ow.optional.number,
@@ -103,5 +105,6 @@ export const bundlerConfigDefault: Partial<BundlerConfig> = {
   unsafe: false,
   conditionalRpc: false,
   minStake: MIN_STAKE_VALUE,
-  minUnstakeDelay: MIN_UNSTAKE_DELAY
+  minUnstakeDelay: MIN_UNSTAKE_DELAY,
+  eip7702Support: true
 }

packages/bundler/src/BundlerServer.ts

@@ -1,7 +1,7 @@
 import bodyParser from 'body-parser'
 import cors from 'cors'
 import express, { Express, Response, Request, RequestHandler } from 'express'
-import { JsonRpcProvider, Provider } from '@ethersproject/providers'
+import { JsonRpcProvider } from '@ethersproject/providers'
 import { Signer, utils } from 'ethers'
 import { parseEther } from 'ethers/lib/utils'
 import { Server } from 'http'
@@ -39,7 +39,7 @@ export class BundlerServer {
     readonly methodHandlerRip7560: MethodHandlerRIP7560,
     readonly debugHandler: DebugMethodHandler,
     readonly config: BundlerConfig,
-    readonly provider: Provider,
+    readonly provider: JsonRpcProvider,
     readonly wallet: Signer
   ) {
     this.appPublic = express()
@@ -95,7 +95,8 @@ export class BundlerServer {
       callGasLimit: 0,
       maxFeePerGas: 0,
       maxPriorityFeePerGas: 0,
-      signature: '0x'
+      signature: '0x',
+      authorizationList: []
     }
     // await EntryPoint__factory.connect(this.config.entryPoint,this.provider).callStatic.addStake(0)
     try {
@@ -260,7 +261,7 @@ export class BundlerServer {
         }
         break
       case 'eth_getRip7560TransactionDebugInfo':
-        result = await (this.provider as JsonRpcProvider).send('eth_getRip7560TransactionDebugInfo', [params[0]])
+        result = await this.provider.send('eth_getRip7560TransactionDebugInfo', [params[0]])
         break
       case 'eth_getTransactionReceipt':
         if (!this.config.rip7560) {

packages/bundler/src/MethodHandlerERC4337.ts

@@ -1,7 +1,8 @@
 import debug from 'debug'
 import { BigNumber, BigNumberish, Signer } from 'ethers'
-import { JsonRpcProvider, Log } from '@ethersproject/providers'
 import { EventFragment } from '@ethersproject/abi'
+import { JsonRpcProvider, Log } from '@ethersproject/providers'
+import { toNumber } from '@nomicfoundation/hardhat-network-helpers/dist/src/utils'
 
 import { MainnetConfig, PreVerificationGasCalculator } from '@account-abstraction/sdk'
 
@@ -118,7 +119,14 @@ export class MethodHandlerERC4337 {
    * @param entryPointInput
    * @param stateOverride
    */
-  async estimateUserOperationGas (userOp1: Partial<UserOperation>, entryPointInput: string, stateOverride?: StateOverride): Promise<EstimateUserOpGasResult> {
+  async estimateUserOperationGas (
+    userOp1: Partial<UserOperation>,
+    entryPointInput: string,
+    stateOverride?: StateOverride
+  ): Promise<EstimateUserOpGasResult> {
+    if (!this.config.eip7702Support && userOp1.authorizationList != null && userOp1.authorizationList.length !== 0) {
+      throw new Error('EIP-7702 tuples are not supported')
+    }
     const userOp: UserOperation = {
       // default values for missing fields.
       maxFeePerGas: 0,
@@ -146,17 +154,26 @@ export class MethodHandlerERC4337 {
 
     const returnInfo = decodeSimulateHandleOpResult(ret)
 
-    const { validAfter, validUntil } = mergeValidationDataValues(returnInfo.accountValidationData, returnInfo.paymasterValidationData)
+    const {
+      validAfter,
+      validUntil
+    } = mergeValidationDataValues(returnInfo.accountValidationData, returnInfo.paymasterValidationData)
     const {
       preOpGas
     } = returnInfo
 
     // todo: use simulateHandleOp for this too...
-    let callGasLimit = await this.provider.estimateGas({
-      from: this.entryPoint.address,
-      to: userOp.sender,
-      data: userOp.callData
-    }).then(b => b.toNumber()).catch(err => {
+    let callGasLimit = await this.provider.send(
+      'eth_estimateGas', [
+        {
+          from: this.entryPoint.address,
+          to: userOp.sender,
+          data: userOp.callData,
+          // @ts-ignore
+          authorizationList: userOp.authorizationList
+        }
+      ]
+    ).then(b => toNumber(b)).catch(err => {
       const message = err.message.match(/reason="(.*?)"/)?.at(1) ?? 'execution reverted'
       throw new RpcError(message, ValidationErrors.UserOperationReverted)
     })
@@ -175,9 +192,12 @@ export class MethodHandlerERC4337 {
   }
 
   async sendUserOperation (userOp: UserOperation, entryPointInput: string): Promise<string> {
+    if (!this.config.eip7702Support && userOp.authorizationList != null && userOp.authorizationList.length !== 0) {
+      throw new Error('EIP-7702 tuples are not supported')
+    }
     await this._validateParameters(userOp, entryPointInput)
 
-    debug(`UserOperation: Sender=${userOp.sender}  Nonce=${tostr(userOp.nonce)} EntryPoint=${entryPointInput} Paymaster=${userOp.paymaster ?? ''}`)
+    debug(`UserOperation: Sender=${userOp.sender}  Nonce=${tostr(userOp.nonce)} EntryPoint=${entryPointInput} Paymaster=${userOp.paymaster ?? ''} EIP-7702TuplesSize=${userOp.authorizationList?.length}`)
     await this.execManager.sendUserOperation(userOp, entryPointInput, false)
     return await this.entryPoint.getUserOpHash(packUserOp(userOp))
   }

packages/bundler/src/MethodHandlerRIP7560.ts

@@ -2,6 +2,7 @@ import { BigNumberish } from 'ethers'
 import { JsonRpcProvider, TransactionReceipt } from '@ethersproject/providers'
 import {
   AddressZero,
+  EIP7702Authorization,
   OperationBase,
   OperationRIP7560,
   StorageMap,
@@ -29,11 +30,18 @@ export class MethodHandlerRIP7560 {
     return getRIP7560TransactionHash(transaction)
   }
 
+  /**
+   * @param minBaseFee
+   * @param maxBundleGas
+   * @param maxBundleSize
+   * @return An array of transactions included in the bundle.
+   * @return The EIP7702Authorization array is always empty as each individual RIP-7560 transaction performs its own authorizations.
+   */
   async getRip7560Bundle (
     minBaseFee: BigNumberish,
     maxBundleGas: BigNumberish,
     maxBundleSize: BigNumberish
-  ): Promise<[OperationBase[], StorageMap]> {
+  ): Promise<[OperationBase[], EIP7702Authorization[], StorageMap]> {
     return await this.execManager.createBundle(minBaseFee, maxBundleGas, maxBundleSize)
   }