feat: allow disabling account checks so contract's can be pranked (#468)

* feat: allow disabling account checks so contract's can be pranked

* update mdbook

* remove medusa.json from version control

* run prettier

---------

Co-authored-by: Anish Naik <[email protected]>

Author: 0xalpharush

chain/config/config.go

@@ -14,6 +14,9 @@ type TestChainConfig struct {
 	// CheatCodeConfig indicates the configuration for EVM cheat codes to use.
 	CheatCodeConfig CheatCodeConfig `json:"cheatCodes"`
 
+	// SkipAccountChecks skips account pre-checks like nonce validation and disallowing non-EOA tx senders (this is done in eth_call, for instance).
+	SkipAccountChecks bool `json:"skipAccountChecks"`
+
 	// ContractAddressOverrides describes contracts that are going to be deployed at deterministic addresses
 	ContractAddressOverrides map[common.Hash]common.Address `json:"contractAddressOverrides,omitempty"`
 }

chain/config/config_defaults.go

@@ -10,6 +10,7 @@ func DefaultTestChainConfig() (*TestChainConfig, error) {
 			CheatCodesEnabled: true,
 			EnableFFI:         false,
 		},
+		SkipAccountChecks: true,
 	}
 
 	// Return the generated configuration.

docs/src/project_configuration/chain_config.md

@@ -9,6 +9,12 @@ The chain configuration defines the parameters for setting up `medusa`'s underly
 - > 🚩 Setting `codeSizeCheckDisabled` to `false` is not recommended since it complicates the fuzz testing process.
 - **Default**: `true`
 
+### `skipAccountChecks`
+
+- **Type**: Boolean
+- **Description**: If `true`, account-related checks (nonce validation, transaction origin must be an EOA) are disabled in `go-ethereum`.
+- **Default**: `true`
+
 ## Cheatcode Configuration
 
 ### `cheatCodesEnabled`

docs/src/static/medusa.json

@@ -4,10 +4,12 @@
     "workerResetLimit": 50,
     "timeout": 0,
     "testLimit": 0,
+    "shrinkLimit": 5000,
     "callSequenceLength": 100,
     "corpusDirectory": "",
     "coverageEnabled": true,
     "targetContracts": [],
+    "predeployedContracts": {},
     "targetContractsBalances": [],
     "constructorArgs": {},
     "deployerAddress": "0x30000",
@@ -45,14 +47,17 @@
       "optimizationTesting": {
         "enabled": true,
         "testPrefixes": ["optimize_"]
-      }
+      },
+      "targetFunctionSignatures": [],
+      "excludeFunctionSignatures": []
     },
     "chainConfig": {
       "codeSizeCheckDisabled": true,
       "cheatCodes": {
         "cheatCodesEnabled": true,
         "enableFFI": false
-      }
+      },
+      "skipAccountChecks": true
     }
   },
   "compilation": {

fuzzing/fuzzer_worker_sequence_generator.go

@@ -321,6 +321,10 @@ func (g *CallSequenceGenerator) generateNewElement() (*calls.CallSequenceElement
 		InputValues: args,
 	})
 
+	if g.worker.fuzzer.config.Fuzzing.TestChainConfig.SkipAccountChecks {
+		msg.SkipAccountChecks = true
+	}
+
 	// Determine our delay values for this element
 	blockNumberDelay := uint64(0)
 	blockTimestampDelay := uint64(0)