evm

README

EVM support

This package and subpackages contain the code for the evm core contract, which allows to execute Ethereum VM (EVM) code on top of the ISC chain, thus adding support for Ethereum smart contracts.

Installing @iscmagic contracts

The @iscmagic contracts are installable via NPM with

npm install --save @iota/iscmagic

After installing @iota/iscmagic you can use the functions by importing them as you normally would.

import "@iota/iscmagic/ISC.sol"
...
...

JSON-RPC

The Wasp node provides a JSON-RPC service at /chain/<isc-chainid>/evm/jsonrpc. This will allow you to connect any standard Ethereum tool, like Metamask. You can check the Metamask connection parameters for any given ISC chain in the Dashboard.

Complete example using wasp-cluster

1. Start a test cluster:

   wasp-cluster start -d
   

2. In a different terminal, initialize a private key and request some iotas from the faucet:

   wasp-cli init
   wasp-cli request-funds
   

3. Deploy an ISC chain with an arbitrary Ethereum chain ID (which should be different from any standard Ethereum chain IDs -- see https://chainlist.org):

   wasp-cli chain deploy --chain=mychain --evm-chainid 1234
   

4. Send some base tokens from your L1 account to any Ethereum account on L2 (e.g. to cover for gas fees):

   wasp-cli chain deposit 0xa1b2c3d4... base:1000000
   

5. Visit the Wasp dashboard (<URL>/wasp/dashboard when using node-docker-setup), go to Chains, then to your ISC chain, scroll down and you will find the EVM section with the JSON-RPC URL for Metamask or any other Ethereum tool.

You can now deploy an EVM contract like you would on Ethereum.

For more information check out the docs.

Documentation

Overview

Package evm contains the declaration of the evm core contract's interface.

Index

• Constants
• Variables
• func ContractPartition(chainState kv.KVStore) kv.KVStore
• func ContractPartitionR(chainState kv.KVStoreReader) kv.KVStoreReader
• func EmulatorStateSubrealm(evmPartition kv.KVStore) kv.KVStore
• func EmulatorStateSubrealmR(evmPartition kv.KVStoreReader) kv.KVStoreReader
• func ISCMagicSubrealm(evmPartition kv.KVStore) kv.KVStore
• func ISCMagicSubrealmR(evmPartition kv.KVStoreReader) kv.KVStoreReader

Constants

const (
	FieldTransaction      = evmnames.FieldTransaction
	FieldCallMsg          = evmnames.FieldCallMsg
	FieldChainID          = evmnames.FieldChainID
	FieldAddress          = evmnames.FieldAddress
	FieldKey              = evmnames.FieldKey
	FieldAgentID          = evmnames.FieldAgentID
	FieldTransactionIndex = evmnames.FieldTransactionIndex
	FieldTransactionHash  = evmnames.FieldTransactionHash
	FieldResult           = evmnames.FieldResult
	FieldBlockNumber      = evmnames.FieldBlockNumber
	FieldBlockHash        = evmnames.FieldBlockHash
	FieldFilterQuery      = evmnames.FieldFilterQuery
	FieldBlockKeepAmount  = evmnames.FieldBlockKeepAmount // int32

	FieldNativeTokenID      = evmnames.FieldNativeTokenID
	FieldFoundrySN          = evmnames.FieldFoundrySN         // uint32
	FieldTokenName          = evmnames.FieldTokenName         // string
	FieldTokenTickerSymbol  = evmnames.FieldTokenTickerSymbol // string
	FieldTokenDecimals      = evmnames.FieldTokenDecimals     // uint8
	FieldNFTCollectionID    = evmnames.FieldNFTCollectionID   // NFTID
	FieldFoundryTokenScheme = evmnames.FieldFoundryTokenScheme
	FieldTargetAddress      = evmnames.FieldTargetAddress
)

const (
	// TODO shouldn't this be different between chain, to prevent replay attacks? (maybe derived from ISC ChainID)
	DefaultChainID = uint16(1074) // IOTA -- get it?
)

Variables

var (
	// FuncSendTransaction is the main entry point, called by an
	// evmOffLedgerTxRequest in order to process an Ethereum tx (e.g.
	// eth_sendRawTransaction).
	FuncSendTransaction = coreutil.Func(evmnames.FuncSendTransaction)

	// FuncCallContract is the entry point called by an evmOffLedgerCallRequest
	// in order to process a view call or gas estimation (e.g. eth_call, eth_estimateGas).
	FuncCallContract = coreutil.Func(evmnames.FuncCallContract)

	FuncGetChainID = coreutil.ViewFunc(evmnames.FuncGetChainID)

	FuncRegisterERC20NativeToken              = coreutil.Func(evmnames.FuncRegisterERC20NativeToken)
	FuncRegisterERC20NativeTokenOnRemoteChain = coreutil.Func(evmnames.FuncRegisterERC20NativeTokenOnRemoteChain)
	FuncRegisterERC20ExternalNativeToken      = coreutil.Func(evmnames.FuncRegisterERC20ExternalNativeToken)
	FuncGetERC20ExternalNativeTokenAddress    = coreutil.ViewFunc(evmnames.FuncGetERC20ExternalNativeTokenAddress)
	FuncRegisterERC721NFTCollection           = coreutil.Func(evmnames.FuncRegisterERC721NFTCollection)
)

var Contract = coreutil.NewContract(evmnames.Contract)

var GasPrice = big.NewInt(0)

Gas is charged in isc VM (L1 currencies), not ETH

Functions

func ContractPartition

func ContractPartition(chainState kv.KVStore) kv.KVStore

func ContractPartitionR

func ContractPartitionR(chainState kv.KVStoreReader) kv.KVStoreReader

func EmulatorStateSubrealm

func EmulatorStateSubrealm(evmPartition kv.KVStore) kv.KVStore

func EmulatorStateSubrealmR

func EmulatorStateSubrealmR(evmPartition kv.KVStoreReader) kv.KVStoreReader

func ISCMagicSubrealm

func ISCMagicSubrealm(evmPartition kv.KVStore) kv.KVStore

func ISCMagicSubrealmR

func ISCMagicSubrealmR(evmPartition kv.KVStoreReader) kv.KVStoreReader