ethereumjs-vm

constructor

constructor(opts?: VMOpts);

• Instantiates a new [[VM]] Object.

  Parameter opts

  Default values for the options are: - chain: 'mainnet' - hardfork: 'petersburg' [supported: 'byzantium', 'constantinople', 'petersburg', 'istanbul' (DRAFT) (will throw on unsupported)] - activatePrecompiles: false - allowUnlimitedContractSize: false [ONLY set to true during debugging]

property allowUnlimitedContractSize

allowUnlimitedContractSize: boolean;

property blockchain

blockchain: Blockchain;

property opts

opts: VMOpts;

property pStateManager

readonly pStateManager: PStateManager;

property stateManager

stateManager: StateManager;

method copy

copy: () => VM;

• Returns a copy of the [[VM]] instance.

method runBlock

runBlock: (opts: RunBlockOpts) => Promise<RunBlockResult>;

• Processes the block running all of the transactions it contains and updating the miner's account

  This method modifies the state. If generate is true, the state modifications will be reverted if an exception is raised. If it's false, it won't revert if the block's header is invalid. If an error is thrown from an event handler, the state may or may not be reverted.

  Parameter opts

  Default values for options: - generate: false

method runBlockchain

runBlockchain: (blockchain: any) => Promise<void>;

• Processes blocks and adds them to the blockchain.

  This method modifies the state.

  Parameter blockchain

  A [blockchain](https://github.com/ethereum/ethereumjs-blockchain) object to process

method runCall

runCall: (opts: RunCallOpts) => Promise<EVMResult>;

• runs a call (or create) operation.

  This method modifies the state.

method runCode

runCode: (opts: RunCodeOpts) => Promise<ExecResult>;

• Runs EVM code.

  This method modifies the state.

method runTx

runTx: (opts: RunTxOpts) => Promise<RunTxResult>;

• Process a transaction. Run the vm. Transfers eth. Checks balances.

  This method modifies the state. If an error is thrown, the modifications are reverted, except when the error is thrown from an event handler. In the latter case the state may or may not be reverted.

property activatePrecompiles

activatePrecompiles?: boolean;

• If true, create entries in the state tree for the precompiled contracts, saving some gas the first time each of them is called.

  If this parameter is false, the first call to each of them has to pay an extra 25000 gas for creating the account.

  Setting this to true has the effect of precompiled contracts' gas costs matching mainnet's from the very first call, which is intended for testing networks.

property allowUnlimitedContractSize

allowUnlimitedContractSize?: boolean;

• Allows unlimited contract sizes while debugging. By setting this to true, the check for contract size limit of 24KB (see [EIP-170](https://git.io/vxZkK)) is bypassed

property blockchain

blockchain?: Blockchain;

• A [blockchain](https://github.com/ethereumjs/ethereumjs-blockchain) object for storing/retrieving blocks

property chain

chain?: string;

• The chain the VM operates on

property common

common?: Common;

property hardfork

hardfork?: string;

• Hardfork rules to be used

property state

state?: any;

• A [merkle-patricia-tree](https://github.com/ethereumjs/merkle-patricia-tree) instance for the state tree (ignored if stateManager is passed)

  Deprecated

property stateManager

stateManager?: StateManager;

• A [[StateManager]] instance to use as the state store (Beta API)