Vm

Inherits: VmSafe

The Vm interface does allow manipulation of the EVM state. These are all intended to be used in tests, but it is not recommended to use these cheats in scripts.

Functions

accessList

Utility cheatcode to set an EIP-2930 access list for all subsequent transactions.

function accessList(AccessListItem[] calldata access) external;

activeFork

Returns the identifier of the currently active fork. Reverts if no fork is currently active.

function activeFork() external view returns (uint256 forkId);

allowCheatcodes

In forking mode, explicitly grant the given address cheatcode access.

function allowCheatcodes(address account) external;

blobBaseFee

Sets block.blobbasefee

function blobBaseFee(uint256 newBlobBaseFee) external;

blobhashes

Sets the blobhashes in the transaction. Not available on EVM versions before Cancun. If used on unsupported EVM versions it will revert.

function blobhashes(bytes32[] calldata hashes) external;

chainId

Sets block.chainid.

function chainId(uint256 newChainId) external;

clearMockedCalls

Clears all mocked calls.

function clearMockedCalls() external;

cloneAccount

Clones a source account code, state, balance and nonce to a target account and updates in-memory EVM state.

function cloneAccount(address source, address target) external;

coinbase

Sets block.coinbase.

function coinbase(address newCoinbase) external;

cool

Marks the slots of an account and the account address as cold.

function cool(address target) external;

coolSlot

Utility cheatcode to mark specific storage slot as cold, simulating no prior read.

function coolSlot(address target, bytes32 slot) external;

createFork

Creates a new fork with the given endpoint and the latest block and returns the identifier of the fork.

function createFork(string calldata urlOrAlias) external returns (uint256 forkId);

createFork

Creates a new fork with the given endpoint and block and returns the identifier of the fork.

function createFork(string calldata urlOrAlias, uint256 blockNumber) external returns (uint256 forkId);

createFork

Creates a new fork with the given endpoint and at the block the given transaction was mined in, replays all transaction mined in the block before the transaction, and returns the identifier of the fork.

function createFork(string calldata urlOrAlias, bytes32 txHash) external returns (uint256 forkId);

createSelectFork

Creates and also selects a new fork with the given endpoint and the latest block and returns the identifier of the fork.

function createSelectFork(string calldata urlOrAlias) external returns (uint256 forkId);

createSelectFork

Creates and also selects a new fork with the given endpoint and block and returns the identifier of the fork.

function createSelectFork(string calldata urlOrAlias, uint256 blockNumber) external returns (uint256 forkId);

createSelectFork

Creates and also selects new fork with the given endpoint and at the block the given transaction was mined in, replays all transaction mined in the block before the transaction, returns the identifier of the fork.

function createSelectFork(string calldata urlOrAlias, bytes32 txHash) external returns (uint256 forkId);

deal

Sets an address' balance.

function deal(address account, uint256 newBalance) external;

deleteStateSnapshot

Removes the snapshot with the given ID created by snapshot. Takes the snapshot ID to delete. Returns true if the snapshot was successfully deleted. Returns false if the snapshot does not exist.

function deleteStateSnapshot(uint256 snapshotId) external returns (bool success);

deleteStateSnapshots

Removes all snapshots previously created by snapshot.

function deleteStateSnapshots() external;

difficulty

Sets block.difficulty. Not available on EVM versions from Paris onwards. Use prevrandao instead. Reverts if used on unsupported EVM versions.

function difficulty(uint256 newDifficulty) external;

dumpState

Dump a genesis JSON file's allocs to disk.

function dumpState(string calldata pathToStateJson) external;

etch

Sets an address' code.

function etch(address target, bytes calldata newRuntimeBytecode) external;

fee

Sets block.basefee.

function fee(uint256 newBasefee) external;

getBlobhashes

Gets the blockhashes from the current transaction. Not available on EVM versions before Cancun. If used on unsupported EVM versions it will revert.

function getBlobhashes() external view returns (bytes32[] memory hashes);

isPersistent

Returns true if the account is marked as persistent.

function isPersistent(address account) external view returns (bool persistent);

loadAllocs

Load a genesis JSON file's allocs into the in-memory EVM state.

function loadAllocs(string calldata pathToAllocsJson) external;

makePersistent

Marks that the account(s) should use persistent storage across fork swaps in a multifork setup Meaning, changes made to the state of this account will be kept when switching forks.

function makePersistent(address account) external;

makePersistent

See makePersistent(address).

function makePersistent(address account0, address account1) external;

makePersistent

See makePersistent(address).

function makePersistent(address account0, address account1, address account2) external;

makePersistent

See makePersistent(address).

function makePersistent(address[] calldata accounts) external;

mockCallRevert

Reverts a call to an address with specified revert data.

function mockCallRevert(address callee, bytes calldata data, bytes calldata revertData) external;

mockCallRevert

Reverts a call to an address with a specific msg.value, with specified revert data.

function mockCallRevert(address callee, uint256 msgValue, bytes calldata data, bytes calldata revertData) external;

mockCallRevert

Reverts a call to an address with specified revert data. Overload to pass the function selector directly token.approve.selector instead of abi.encodeWithSelector(token.approve.selector).

function mockCallRevert(address callee, bytes4 data, bytes calldata revertData) external;

mockCallRevert

Reverts a call to an address with a specific msg.value, with specified revert data. Overload to pass the function selector directly token.approve.selector instead of abi.encodeWithSelector(token.approve.selector).

function mockCallRevert(address callee, uint256 msgValue, bytes4 data, bytes calldata revertData) external;

mockCall

Mocks a call to an address, returning specified data. Calldata can either be strict or a partial match, e.g. if you only pass a Solidity selector to the expected calldata, then the entire Solidity function will be mocked.

function mockCall(address callee, bytes calldata data, bytes calldata returnData) external;

mockCall

Mocks a call to an address with a specific msg.value, returning specified data. Calldata match takes precedence over msg.value in case of ambiguity.

function mockCall(address callee, uint256 msgValue, bytes calldata data, bytes calldata returnData) external;

mockCall

Mocks a call to an address, returning specified data. Calldata can either be strict or a partial match, e.g. if you only pass a Solidity selector to the expected calldata, then the entire Solidity function will be mocked. Overload to pass the function selector directly token.approve.selector instead of abi.encodeWithSelector(token.approve.selector).

function mockCall(address callee, bytes4 data, bytes calldata returnData) external;

mockCall

Mocks a call to an address with a specific msg.value, returning specified data. Calldata match takes precedence over msg.value in case of ambiguity. Overload to pass the function selector directly token.approve.selector instead of abi.encodeWithSelector(token.approve.selector).

function mockCall(address callee, uint256 msgValue, bytes4 data, bytes calldata returnData) external;

mockCalls

Mocks multiple calls to an address, returning specified data for each call.

function mockCalls(address callee, bytes calldata data, bytes[] calldata returnData) external;

mockCalls

Mocks multiple calls to an address with a specific msg.value, returning specified data for each call.

function mockCalls(address callee, uint256 msgValue, bytes calldata data, bytes[] calldata returnData) external;

mockFunction

Whenever a call is made to callee with calldata data, this cheatcode instead calls target with the same calldata. This functionality is similar to a delegate call made to target contract from callee. Can be used to substitute a call to a function with another implementation that captures the primary logic of the original function but is easier to reason about. If calldata is not a strict match then partial match by selector is attempted.

function mockFunction(address callee, address target, bytes calldata data) external;

noAccessList

Utility cheatcode to remove any EIP-2930 access list set by accessList cheatcode.

function noAccessList() external;

prank

Sets the next call's msg.sender to be the input address.

function prank(address msgSender) external;

prank

Sets the next call's msg.sender to be the input address, and the tx.origin to be the second input.

function prank(address msgSender, address txOrigin) external;

prank

Sets the next delegate call's msg.sender to be the input address.

function prank(address msgSender, bool delegateCall) external;

prank

Sets the next delegate call's msg.sender to be the input address, and the tx.origin to be the second input.

function prank(address msgSender, address txOrigin, bool delegateCall) external;

prevrandao

Sets block.prevrandao. Not available on EVM versions before Paris. Use difficulty instead. If used on unsupported EVM versions it will revert.

function prevrandao(bytes32 newPrevrandao) external;

prevrandao

Sets block.prevrandao. Not available on EVM versions before Paris. Use difficulty instead. If used on unsupported EVM versions it will revert.

function prevrandao(uint256 newPrevrandao) external;

readCallers

Reads the current msg.sender and tx.origin from state and reports if there is any active caller modification.

function readCallers() external returns (CallerMode callerMode, address msgSender, address txOrigin);

resetNonce

Resets the nonce of an account to 0 for EOAs and 1 for contract accounts.

function resetNonce(address account) external;

revertToState

Revert the state of the EVM to a previous snapshot Takes the snapshot ID to revert to. Returns true if the snapshot was successfully reverted. Returns false if the snapshot does not exist. Note: This does not automatically delete the snapshot. To delete the snapshot use deleteStateSnapshot.

function revertToState(uint256 snapshotId) external returns (bool success);

revertToStateAndDelete

Revert the state of the EVM to a previous snapshot and automatically deletes the snapshots Takes the snapshot ID to revert to. Returns true if the snapshot was successfully reverted and deleted. Returns false if the snapshot does not exist.

function revertToStateAndDelete(uint256 snapshotId) external returns (bool success);

revokePersistent

Revokes persistent status from the address, previously added via makePersistent.

function revokePersistent(address account) external;

revokePersistent

See revokePersistent(address).

function revokePersistent(address[] calldata accounts) external;

roll

Sets block.height.

function roll(uint256 newHeight) external;

rollFork

Updates the currently active fork to given block number This is similar to roll but for the currently active fork.

function rollFork(uint256 blockNumber) external;

rollFork

Updates the currently active fork to given transaction. This will rollFork with the number of the block the transaction was mined in and replays all transaction mined before it in the block.

function rollFork(bytes32 txHash) external;

rollFork

Updates the given fork to given block number.

function rollFork(uint256 forkId, uint256 blockNumber) external;

rollFork

Updates the given fork to block number of the given transaction and replays all transaction mined before it in the block.

function rollFork(uint256 forkId, bytes32 txHash) external;

selectFork

Takes a fork identifier created by createFork and sets the corresponding forked state as active.

function selectFork(uint256 forkId) external;

setBlockhash

Set blockhash for the current block. It only sets the blockhash for blocks where block.number - 256 <= number < block.number.

function setBlockhash(uint256 blockNumber, bytes32 blockHash) external;

setNonce

Sets the nonce of an account. Must be higher than the current nonce of the account.

function setNonce(address account, uint64 newNonce) external;

setNonceUnsafe

Sets the nonce of an account to an arbitrary value.

function setNonceUnsafe(address account, uint64 newNonce) external;

snapshotGasLastCall

Snapshot capture the gas usage of the last call by name from the callee perspective.

function snapshotGasLastCall(string calldata name) external returns (uint256 gasUsed);

snapshotGasLastCall

Snapshot capture the gas usage of the last call by name in a group from the callee perspective.

function snapshotGasLastCall(string calldata group, string calldata name) external returns (uint256 gasUsed);

snapshotState

Snapshot the current state of the evm. Returns the ID of the snapshot that was created. To revert a snapshot use revertToState.

function snapshotState() external returns (uint256 snapshotId);

snapshotValue

Snapshot capture an arbitrary numerical value by name. The group name is derived from the contract name.

function snapshotValue(string calldata name, uint256 value) external;

snapshotValue

Snapshot capture an arbitrary numerical value by name in a group.

function snapshotValue(string calldata group, string calldata name, uint256 value) external;

startPrank

Sets all subsequent calls' msg.sender to be the input address until stopPrank is called.

function startPrank(address msgSender) external;

startPrank

Sets all subsequent calls' msg.sender to be the input address until stopPrank is called, and the tx.origin to be the second input.

function startPrank(address msgSender, address txOrigin) external;

startPrank

Sets all subsequent delegate calls' msg.sender to be the input address until stopPrank is called.

function startPrank(address msgSender, bool delegateCall) external;

startPrank

Sets all subsequent delegate calls' msg.sender to be the input address until stopPrank is called, and the tx.origin to be the second input.

function startPrank(address msgSender, address txOrigin, bool delegateCall) external;

startSnapshotGas

Start a snapshot capture of the current gas usage by name. The group name is derived from the contract name.

function startSnapshotGas(string calldata name) external;

startSnapshotGas

Start a snapshot capture of the current gas usage by name in a group.

function startSnapshotGas(string calldata group, string calldata name) external;

stopPrank

Resets subsequent calls' msg.sender to be address(this).

function stopPrank() external;

stopSnapshotGas

Stop the snapshot capture of the current gas by latest snapshot name, capturing the gas used since the start.

function stopSnapshotGas() external returns (uint256 gasUsed);

stopSnapshotGas

Stop the snapshot capture of the current gas usage by name, capturing the gas used since the start. The group name is derived from the contract name.

function stopSnapshotGas(string calldata name) external returns (uint256 gasUsed);

stopSnapshotGas

Stop the snapshot capture of the current gas usage by name in a group, capturing the gas used since the start.

function stopSnapshotGas(string calldata group, string calldata name) external returns (uint256 gasUsed);

store

Stores a value to an address' storage slot.

function store(address target, bytes32 slot, bytes32 value) external;

transact

Fetches the given transaction from the active fork and executes it on the current state.

function transact(bytes32 txHash) external;

transact

Fetches the given transaction from the given fork and executes it on the current state.

function transact(uint256 forkId, bytes32 txHash) external;

txGasPrice

Sets tx.gasprice.

function txGasPrice(uint256 newGasPrice) external;

warmSlot

Utility cheatcode to mark specific storage slot as warm, simulating a prior read.

function warmSlot(address target, bytes32 slot) external;

warp

Sets block.timestamp.

function warp(uint256 newTimestamp) external;

deleteSnapshot

deleteSnapshot is being deprecated in favor of deleteStateSnapshot. It will be removed in future versions.

function deleteSnapshot(uint256 snapshotId) external returns (bool success);

deleteSnapshots

deleteSnapshots is being deprecated in favor of deleteStateSnapshots. It will be removed in future versions.

function deleteSnapshots() external;

revertToAndDelete

revertToAndDelete is being deprecated in favor of revertToStateAndDelete. It will be removed in future versions.

function revertToAndDelete(uint256 snapshotId) external returns (bool success);

revertTo

revertTo is being deprecated in favor of revertToState. It will be removed in future versions.

function revertTo(uint256 snapshotId) external returns (bool success);

snapshot

snapshot is being deprecated in favor of snapshotState. It will be removed in future versions.

function snapshot() external returns (uint256 snapshotId);

expectCallMinGas

Expect a call to an address with the specified msg.value and calldata, and a minimum amount of gas.

function expectCallMinGas(address callee, uint256 msgValue, uint64 minGas, bytes calldata data) external;

expectCallMinGas

Expect given number of calls to an address with the specified msg.value and calldata, and a minimum amount of gas.

function expectCallMinGas(address callee, uint256 msgValue, uint64 minGas, bytes calldata data, uint64 count)
    external;

expectCall

Expects a call to an address with the specified calldata. Calldata can either be a strict or a partial match.

function expectCall(address callee, bytes calldata data) external;

expectCall

Expects given number of calls to an address with the specified calldata.

function expectCall(address callee, bytes calldata data, uint64 count) external;

expectCall

Expects a call to an address with the specified msg.value and calldata.

function expectCall(address callee, uint256 msgValue, bytes calldata data) external;

expectCall

Expects given number of calls to an address with the specified msg.value and calldata.

function expectCall(address callee, uint256 msgValue, bytes calldata data, uint64 count) external;

expectCall

Expect a call to an address with the specified msg.value, gas, and calldata.

function expectCall(address callee, uint256 msgValue, uint64 gas, bytes calldata data) external;

expectCall

Expects given number of calls to an address with the specified msg.value, gas, and calldata.

function expectCall(address callee, uint256 msgValue, uint64 gas, bytes calldata data, uint64 count) external;

expectCreate

Expects the deployment of the specified bytecode by the specified address using the CREATE opcode

function expectCreate(bytes calldata bytecode, address deployer) external;

expectCreate2

Expects the deployment of the specified bytecode by the specified address using the CREATE2 opcode

function expectCreate2(bytes calldata bytecode, address deployer) external;

expectEmitAnonymous

Prepare an expected anonymous log with (bool checkTopic1, bool checkTopic2, bool checkTopic3, bool checkData.). Call this function, then emit an anonymous event, then call a function. Internally after the call, we check if logs were emitted in the expected order with the expected topics and data (as specified by the booleans).

function expectEmitAnonymous(bool checkTopic0, bool checkTopic1, bool checkTopic2, bool checkTopic3, bool checkData)
    external;

expectEmitAnonymous

Same as the previous method, but also checks supplied address against emitting contract.

function expectEmitAnonymous(
    bool checkTopic0,
    bool checkTopic1,
    bool checkTopic2,
    bool checkTopic3,
    bool checkData,
    address emitter
) external;

expectEmitAnonymous

Prepare an expected anonymous log with all topic and data checks enabled. Call this function, then emit an anonymous event, then call a function. Internally after the call, we check if logs were emitted in the expected order with the expected topics and data.

function expectEmitAnonymous() external;

expectEmitAnonymous

Same as the previous method, but also checks supplied address against emitting contract.

function expectEmitAnonymous(address emitter) external;

expectEmit

Prepare an expected log with (bool checkTopic1, bool checkTopic2, bool checkTopic3, bool checkData.). Call this function, then emit an event, then call a function. Internally after the call, we check if logs were emitted in the expected order with the expected topics and data (as specified by the booleans).

function expectEmit(bool checkTopic1, bool checkTopic2, bool checkTopic3, bool checkData) external;

expectEmit

Same as the previous method, but also checks supplied address against emitting contract.

function expectEmit(bool checkTopic1, bool checkTopic2, bool checkTopic3, bool checkData, address emitter) external;

expectEmit

Prepare an expected log with all topic and data checks enabled. Call this function, then emit an event, then call a function. Internally after the call, we check if logs were emitted in the expected order with the expected topics and data.

function expectEmit() external;

expectEmit

Same as the previous method, but also checks supplied address against emitting contract.

function expectEmit(address emitter) external;

expectEmit

Expect a given number of logs with the provided topics.

function expectEmit(bool checkTopic1, bool checkTopic2, bool checkTopic3, bool checkData, uint64 count) external;

expectEmit

Expect a given number of logs from a specific emitter with the provided topics.

function expectEmit(bool checkTopic1, bool checkTopic2, bool checkTopic3, bool checkData, address emitter, uint64 count)
    external;

expectEmit

Expect a given number of logs with all topic and data checks enabled.

function expectEmit(uint64 count) external;

expectEmit

Expect a given number of logs from a specific emitter with all topic and data checks enabled.

function expectEmit(address emitter, uint64 count) external;

expectPartialRevert

Expects an error on next call that starts with the revert data.

function expectPartialRevert(bytes4 revertData) external;

expectPartialRevert

Expects an error on next call to reverter address, that starts with the revert data.

function expectPartialRevert(bytes4 revertData, address reverter) external;

expectRevert

Expects an error on next call with any revert data.

function expectRevert() external;

expectRevert

Expects an error on next call that exactly matches the revert data.

function expectRevert(bytes4 revertData) external;

expectRevert

Expects a count number of reverts from the upcoming calls from the reverter address that match the revert data.

function expectRevert(bytes4 revertData, address reverter, uint64 count) external;

expectRevert

Expects a count number of reverts from the upcoming calls from the reverter address that exactly match the revert data.

function expectRevert(bytes calldata revertData, address reverter, uint64 count) external;

expectRevert

Expects an error on next call that exactly matches the revert data.

function expectRevert(bytes calldata revertData) external;

expectRevert

Expects an error with any revert data on next call to reverter address.

function expectRevert(address reverter) external;

expectRevert

Expects an error from reverter address on next call, with any revert data.

function expectRevert(bytes4 revertData, address reverter) external;

expectRevert

Expects an error from reverter address on next call, that exactly matches the revert data.

function expectRevert(bytes calldata revertData, address reverter) external;

expectRevert

Expects a count number of reverts from the upcoming calls with any revert data or reverter.

function expectRevert(uint64 count) external;

expectRevert

Expects a count number of reverts from the upcoming calls that match the revert data.

function expectRevert(bytes4 revertData, uint64 count) external;

expectRevert

Expects a count number of reverts from the upcoming calls that exactly match the revert data.

function expectRevert(bytes calldata revertData, uint64 count) external;

expectRevert

Expects a count number of reverts from the upcoming calls from the reverter address.

function expectRevert(address reverter, uint64 count) external;

expectSafeMemory

Only allows memory writes to offsets [0x00, 0x60) ∪ [min, max) in the current subcontext. If any other memory is written to, the test will fail. Can be called multiple times to add more ranges to the set.

function expectSafeMemory(uint64 min, uint64 max) external;

expectSafeMemoryCall

Only allows memory writes to offsets [0x00, 0x60) ∪ [min, max) in the next created subcontext. If any other memory is written to, the test will fail. Can be called multiple times to add more ranges to the set.

function expectSafeMemoryCall(uint64 min, uint64 max) external;

skip

Marks a test as skipped. Must be called at the top level of a test.

function skip(bool skipTest) external;

skip

Marks a test as skipped with a reason. Must be called at the top level of a test.

function skip(bool skipTest, string calldata reason) external;

stopExpectSafeMemory

Stops all safe memory expectation in the current subcontext.

function stopExpectSafeMemory() external;

interceptInitcode

Causes the next contract creation (via new) to fail and return its initcode in the returndata buffer. This allows type-safe access to the initcode payload that would be used for contract creation. Example usage: vm.interceptInitcode(); bytes memory initcode; try new MyContract(param1, param2) { assert(false); } catch (bytes memory interceptedInitcode) { initcode = interceptedInitcode; }

function interceptInitcode() external;