EVM

Data types

data Error

EVM failure modes

Constructors

BalanceTooLow Word Word

UnrecognizedOpcode Word8

SelfDestruction

StackUnderrun

BadJumpDestination

Revert ByteString

NoSuchContract Addr

OutOfGas Word Word

BadCheatCode (Maybe Word32)

StackLimitExceeded

IllegalOverflow

Query Query

Choose Choose

StateChangeWhileStatic

InvalidMemoryAccess

CallDepthLimitReached

MaxCodeSizeExceeded Word Word

PrecompileFailure

UnexpectedSymbolicArg

DeadPath

NotUnique Whiff

SMTTimeout

FFI AbiVals

Instances

Show Error

Defined in EVM

Methods

showsPrec :: Int -> Error -> ShowS

show :: Error -> String

showList :: [Error] -> ShowS

data VMResult

The possible result states of a VM

Constructors

VMFailure Error

An operation failed

VMSuccess Buffer

Reached STOP, RETURN, or end-of-code

Instances

Show VMResult

Defined in EVM

Methods

showsPrec :: Int -> VMResult -> ShowS

show :: VMResult -> String

showList :: [VMResult] -> ShowS

SDisplay VMResult

Defined in EVM.Emacs

Methods

sexp :: VMResult -> SExpr Text

data VM

The state of a stepwise EVM execution

Constructors

VM

Fields

• _result :: Maybe VMResult
• _state :: FrameState
• _frames :: [Frame]
• _env :: Env
• _block :: Block
• _tx :: TxState
• _logs :: Seq Log
• _traces :: TreePos Empty Trace
• _cache :: Cache
• _burned :: Word
• _constraints :: [(SBool, Whiff)]
• _iterations :: Map CodeLocation Int
• _allowFFI :: Bool

Instances

Show VM

Defined in EVM

Methods

showsPrec :: Int -> VM -> ShowS

show :: VM -> String

showList :: [VM] -> ShowS

SDisplay VM

Defined in EVM.Emacs

Methods

sexp :: VM -> SExpr Text

data Trace

Constructors

Trace

Fields

• _traceOpIx :: Int
• _traceContract :: Contract
• _traceData :: TraceData

Instances

Show Trace

Defined in EVM

Methods

showsPrec :: Int -> Trace -> ShowS

show :: Trace -> String

showList :: [Trace] -> ShowS

data TraceData

Constructors

EventTrace Log

FrameTrace FrameContext

QueryTrace Query

ErrorTrace Error

EntryTrace Text

ReturnTrace Buffer FrameContext

Instances

Show TraceData

Defined in EVM

Methods

showsPrec :: Int -> TraceData -> ShowS

show :: TraceData -> String

showList :: [TraceData] -> ShowS

data Query where

Queries halt execution until resolved through RPC calls or SMT queries

Constructors

PleaseFetchContract :: Addr -> StorageModel -> (Contract -> EVM ()) -> Query

PleaseMakeUnique :: SymVal a => SBV a -> [SBool] -> (IsUnique a -> EVM ()) -> Query

PleaseFetchSlot :: Addr -> Word -> (Word -> EVM ()) -> Query

PleaseAskSMT :: SBool -> [SBool] -> (BranchCondition -> EVM ()) -> Query

PleaseDoFFI :: [String] -> (ByteString -> EVM ()) -> Query

Instances

Show Query

Defined in EVM

Methods

showsPrec :: Int -> Query -> ShowS

show :: Query -> String

showList :: [Query] -> ShowS

data Choose where

Constructors

PleaseChoosePath :: Whiff -> (Bool -> EVM ()) -> Choose

Instances

Show Choose

Defined in EVM

Methods

showsPrec :: Int -> Choose -> ShowS

show :: Choose -> String

showList :: [Choose] -> ShowS

type EVM a = State VM a

Alias for the type of e.g. exec1.

type CodeLocation = (Addr, Int)

data BranchCondition

The possible return values of a SMT query

Constructors

Case Bool

Unknown

Inconsistent

Instances

Show BranchCondition

Defined in EVM

Methods

showsPrec :: Int -> BranchCondition -> ShowS

show :: BranchCondition -> String

showList :: [BranchCondition] -> ShowS

data IsUnique a

The possible return values of a `is unique` SMT query

Constructors

Unique a

Multiple

InconsistentU

TimeoutU

Instances

Show a => Show (IsUnique a)

Defined in EVM

Methods

showsPrec :: Int -> IsUnique a -> ShowS

show :: IsUnique a -> String

showList :: [IsUnique a] -> ShowS

data Cache

The cache is data that can be persisted for efficiency: any expensive query that is constant at least within a block.

Constructors

Cache

Fields

• _fetched :: Map Addr Contract
• _path :: Map (CodeLocation, Int) Bool

Instances

Show Cache

Defined in EVM

Methods

showsPrec :: Int -> Cache -> ShowS

show :: Cache -> String

showList :: [Cache] -> ShowS

Semigroup Cache

Defined in EVM

Methods

(<>) :: Cache -> Cache -> Cache

sconcat :: NonEmpty Cache -> Cache

stimes :: Integral b => b -> Cache -> Cache

Monoid Cache

Defined in EVM

Methods

mempty :: Cache

mappend :: Cache -> Cache -> Cache

mconcat :: [Cache] -> Cache

data VMOpts

A way to specify an initial VM state

Constructors

VMOpts

Fields

• vmoptContract :: Contract
• vmoptCalldata :: (Buffer, SymWord)
• vmoptValue :: SymWord
• vmoptAddress :: Addr
• vmoptCaller :: SAddr
• vmoptOrigin :: Addr
• vmoptGas :: W256
• vmoptGaslimit :: W256
• vmoptNumber :: W256
• vmoptTimestamp :: SymWord
• vmoptCoinbase :: Addr
• vmoptDifficulty :: W256
• vmoptMaxCodeSize :: W256
• vmoptBlockGaslimit :: W256
• vmoptGasprice :: W256
• vmoptSchedule :: FeeSchedule Integer
• vmoptChainId :: W256
• vmoptCreate :: Bool
• vmoptStorageModel :: StorageModel
• vmoptTxAccessList :: Map Addr [W256]
• vmoptAllowFFI :: Bool

Instances

Show VMOpts

Defined in EVM

Methods

showsPrec :: Int -> VMOpts -> ShowS

show :: VMOpts -> String

showList :: [VMOpts] -> ShowS

data Log

A log entry

Constructors

Log Addr Buffer [SymWord]

Instances

Show Log

Defined in EVM

Methods

showsPrec :: Int -> Log -> ShowS

show :: Log -> String

showList :: [Log] -> ShowS

data Frame

An entry in the VM's "call/create stack"

Constructors

Frame

Fields

• _frameContext :: FrameContext
• _frameState :: FrameState

Instances

Show Frame

Defined in EVM

Methods

showsPrec :: Int -> Frame -> ShowS

show :: Frame -> String

showList :: [Frame] -> ShowS

SDisplay Frame

Defined in EVM.Emacs

Methods

sexp :: Frame -> SExpr Text

data FrameContext

Call/create info

Constructors

CreationContext

Fields

• creationContextAddress :: Addr
• creationContextCodehash :: W256
• creationContextReversion :: Map Addr Contract
• creationContextSubstate :: SubState

CallContext

Fields

• callContextTarget :: Addr
• callContextContext :: Addr
• callContextOffset :: Word
• callContextSize :: Word
• callContextCodehash :: W256
• callContextAbi :: Maybe Word
• callContextData :: Buffer
• callContextReversion :: Map Addr Contract
• callContextSubState :: SubState

Instances

Show FrameContext

Defined in EVM

Methods

showsPrec :: Int -> FrameContext -> ShowS

show :: FrameContext -> String

showList :: [FrameContext] -> ShowS

SDisplay FrameContext

Defined in EVM.Emacs

Methods

sexp :: FrameContext -> SExpr Text

data FrameState

The "registers" of the VM along with memory and data stack

Constructors

FrameState

Fields

• _contract :: Addr
• _codeContract :: Addr
• _code :: Buffer
• _pc :: Int
• _stack :: [SymWord]
• _memory :: Buffer
• _memorySize :: Int
• _calldata :: (Buffer, SymWord)
• _callvalue :: SymWord
• _caller :: SAddr
• _gas :: Word
• _returndata :: Buffer
• _static :: Bool

Instances

Show FrameState

Defined in EVM

Methods

showsPrec :: Int -> FrameState -> ShowS

show :: FrameState -> String

showList :: [FrameState] -> ShowS

SDisplay FrameState

Defined in EVM.Emacs

Methods

sexp :: FrameState -> SExpr Text

data TxState

The state that spans a whole transaction

Constructors

TxState

Fields

• _gasprice :: Word
• _txgaslimit :: Word
• _origin :: Addr
• _toAddr :: Addr
• _value :: SymWord
• _substate :: SubState
• _isCreate :: Bool
• _txReversion :: Map Addr Contract

Instances

Show TxState

Defined in EVM

Methods

showsPrec :: Int -> TxState -> ShowS

show :: TxState -> String

showList :: [TxState] -> ShowS

data SubState

The "accrued substate" across a transaction

Constructors

SubState

Fields

• _selfdestructs :: [Addr]
• _touchedAccounts :: [Addr]
• _accessedAddresses :: Set Addr
• _accessedStorageKeys :: Set (Addr, W256)
• _refunds :: [(Addr, Integer)]

Instances

Show SubState

Defined in EVM

Methods

showsPrec :: Int -> SubState -> ShowS

show :: SubState -> String

showList :: [SubState] -> ShowS

data ContractCode

A contract is either in creation (running its "constructor") or post-creation, and code in these two modes is treated differently by instructions like EXTCODEHASH, so we distinguish these two code types.

Constructors

InitCode Buffer

Constructor code, during contract creation

RuntimeCode Buffer

Instance code, after contract creation

Instances

Eq ContractCode

Defined in EVM

Methods

(==) :: ContractCode -> ContractCode -> Bool

(/=) :: ContractCode -> ContractCode -> Bool

Ord ContractCode

Defined in EVM

Methods

compare :: ContractCode -> ContractCode -> Ordering

(<) :: ContractCode -> ContractCode -> Bool

(<=) :: ContractCode -> ContractCode -> Bool

(>) :: ContractCode -> ContractCode -> Bool

(>=) :: ContractCode -> ContractCode -> Bool

max :: ContractCode -> ContractCode -> ContractCode

min :: ContractCode -> ContractCode -> ContractCode

Show ContractCode

Defined in EVM

Methods

showsPrec :: Int -> ContractCode -> ShowS

show :: ContractCode -> String

showList :: [ContractCode] -> ShowS

data Storage

A contract can either have concrete or symbolic storage depending on what type of execution we are doing

Constructors

Concrete (Map Word SymWord)

Symbolic [(SymWord, SymWord)] (SArray (WordN 256) (WordN 256))

Instances

Eq Storage

Defined in EVM

Methods

(==) :: Storage -> Storage -> Bool

(/=) :: Storage -> Storage -> Bool

Show Storage

Defined in EVM

Methods

showsPrec :: Int -> Storage -> ShowS

show :: Storage -> String

showList :: [Storage] -> ShowS

SDisplay Storage

Defined in EVM.Emacs

Methods

sexp :: Storage -> SExpr Text

data Contract

The state of a contract

Constructors

Contract

Fields

• _contractcode :: ContractCode
• _storage :: Storage
• _balance :: Word
• _nonce :: Word
• _codehash :: W256
• _opIxMap :: Vector Int
• _codeOps :: Vector (Int, Op)
• _external :: Bool
• _origStorage :: Map Word Word

Instances

Show Contract

Defined in EVM

Methods

showsPrec :: Int -> Contract -> ShowS

show :: Contract -> String

showList :: [Contract] -> ShowS

FromJSON Contract

Defined in EVM.VMTest

Methods

parseJSON :: Value -> Parser Contract

parseJSONList :: Value -> Parser [Contract]

SDisplay Contract

Defined in EVM.Emacs

Methods

sexp :: Contract -> SExpr Text

data StorageModel

When doing symbolic execution, we have three different ways to model the storage of contracts. This determines not only the initial contract storage model but also how RPC or state fetched contracts will be modeled.

Constructors

ConcreteS

Uses Concrete Storage. Reading / Writing from abstract locations causes a runtime failure. Can be nicely combined with RPC.

SymbolicS

Uses Symbolic Storage. Reading / Writing never reaches RPC, but always done using an SMT array with no default value.

InitialS

Uses Symbolic Storage. Reading / Writing never reaches RPC, but always done using an SMT array with 0 as the default value.

Instances

Read StorageModel

Defined in EVM

Methods

readsPrec :: Int -> ReadS StorageModel

readList :: ReadS [StorageModel]

readPrec :: ReadPrec StorageModel

readListPrec :: ReadPrec [StorageModel]

Show StorageModel

Defined in EVM

Methods

showsPrec :: Int -> StorageModel -> ShowS

show :: StorageModel -> String

showList :: [StorageModel] -> ShowS

ParseField StorageModel

Defined in EVM

Methods

parseField :: Maybe Text -> Maybe Text -> Maybe Char -> Maybe String -> Parser StorageModel

parseListOfField :: Maybe Text -> Maybe Text -> Maybe Char -> Maybe String -> Parser [StorageModel]

readField :: ReadM StorageModel

metavar :: proxy StorageModel -> String

data Env

Various environmental data

Constructors

Env

Fields

• _contracts :: Map Addr Contract
• _chainId :: Word
• _storageModel :: StorageModel
• _sha3Crack :: Map Word ByteString
• _keccakUsed :: [([SWord 8], SWord 256)]

Instances

Show Env

Defined in EVM

Methods

showsPrec :: Int -> Env -> ShowS

show :: Env -> String

showList :: [Env] -> ShowS

data Block

Data about the block

Constructors

Block

Fields

• _coinbase :: Addr
• _timestamp :: SymWord
• _number :: Word
• _difficulty :: Word
• _gaslimit :: Word
• _maxCodeSize :: Word
• _schedule :: FeeSchedule Integer

Instances

Show Block

Defined in EVM

Methods

showsPrec :: Int -> Block -> ShowS

show :: Block -> String

showList :: [Block] -> ShowS

blankState :: FrameState

static :: Lens' FrameState Bool

stack :: Lens' FrameState [SymWord]

returndata :: Lens' FrameState Buffer

pc :: Lens' FrameState Int

memorySize :: Lens' FrameState Int

memory :: Lens' FrameState Buffer

gas :: Lens' FrameState Word

contract :: Lens' FrameState Addr

codeContract :: Lens' FrameState Addr

code :: Lens' FrameState Buffer

callvalue :: Lens' FrameState SymWord

caller :: Lens' FrameState SAddr

calldata :: Lens' FrameState (Buffer, SymWord)

frameState :: Lens' Frame FrameState

frameContext :: Lens' Frame FrameContext

timestamp :: Lens' Block SymWord

schedule :: Lens' Block (FeeSchedule Integer)

number :: Lens' Block Word

maxCodeSize :: Lens' Block Word

gaslimit :: Lens' Block Word

difficulty :: Lens' Block Word

coinbase :: Lens' Block Addr

value :: Lens' TxState SymWord

txgaslimit :: Lens' TxState Word

txReversion :: Lens' TxState (Map Addr Contract)

toAddr :: Lens' TxState Addr

substate :: Lens' TxState SubState

origin :: Lens' TxState Addr

isCreate :: Lens' TxState Bool

gasprice :: Lens' TxState Word

touchedAccounts :: Lens' SubState [Addr]

selfdestructs :: Lens' SubState [Addr]

refunds :: Lens' SubState [(Addr, Integer)]

accessedStorageKeys :: Lens' SubState (Set (Addr, W256))

accessedAddresses :: Lens' SubState (Set Addr)

storage :: Lens' Contract Storage

origStorage :: Lens' Contract (Map Word Word)

opIxMap :: Lens' Contract (Vector Int)

nonce :: Lens' Contract Word

external :: Lens' Contract Bool

contractcode :: Lens' Contract ContractCode

codehash :: Lens' Contract W256

codeOps :: Lens' Contract (Vector (Int, Op))

balance :: Lens' Contract Word

storageModel :: Lens' Env StorageModel

sha3Crack :: Lens' Env (Map Word ByteString)

keccakUsed :: Lens' Env [([SWord 8], SWord 256)]

contracts :: Lens' Env (Map Addr Contract)

chainId :: Lens' Env Word

path :: Lens' Cache (Map (CodeLocation, Int) Bool)

fetched :: Lens' Cache (Map Addr Contract)

traceOpIx :: Lens' Trace Int

traceData :: Lens' Trace TraceData

traceContract :: Lens' Trace Contract

tx :: Lens' VM TxState

traces :: Lens' VM (TreePos Empty Trace)

state :: Lens' VM FrameState

result :: Lens' VM (Maybe VMResult)

logs :: Lens' VM (Seq Log)

iterations :: Lens' VM (Map CodeLocation Int)

frames :: Lens' VM [Frame]

env :: Lens' VM Env

constraints :: Lens' VM [(SBool, Whiff)]

cache :: Lens' VM Cache

burned :: Lens' VM Word

block :: Lens' VM Block

allowFFI :: Lens' VM Bool

bytecode :: Getter Contract Buffer

An "external" view of a contract's bytecode, appropriate for e.g. EXTCODEHASH.

unifyCachedContract :: Contract -> Contract -> Contract

Data accessors

currentContract :: VM -> Maybe Contract

Data constructors

makeVm :: VMOpts -> VM

initialContract :: ContractCode -> Contract

Initialize empty contract with given code

contractWithStore :: ContractCode -> Storage -> Contract

Opcode dispatch (exec1)

next :: (?op :: Word8) => EVM ()

Update program counter

exec1 :: EVM ()

Executes the EVM one step

transfer :: Addr -> Addr -> Word -> EVM ()

callChecks :: (?op :: Word8) => Contract -> Word -> Addr -> Addr -> Word -> Word -> Word -> Word -> Word -> [SymWord] -> (Integer -> EVM ()) -> EVM ()

Checks a *CALL for failure; OOG, too many callframes, memory access etc.

precompiledContract :: (?op :: Word8) => Contract -> Word -> Addr -> Addr -> Word -> Word -> Word -> Word -> Word -> [SymWord] -> EVM ()

executePrecompile :: (?op :: Word8) => Addr -> Integer -> Word -> Word -> Word -> Word -> [SymWord] -> EVM ()

truncpadlit :: Int -> ByteString -> ByteString

lazySlice :: Word -> Word -> ByteString -> ByteString

parseModexpLength :: ByteString -> (Word, Word, Word)

isZero :: Word -> Word -> ByteString -> Bool

asInteger :: ByteString -> Integer

Opcode helper actions

noop :: Monad m => m ()

pushTo :: MonadState s m => ASetter s s [a] [a] -> a -> m ()

pushToSequence :: MonadState s m => ASetter s s (Seq a) (Seq a) -> a -> m ()

getCodeLocation :: VM -> CodeLocation

makeUnique :: SymWord -> (Word -> EVM ()) -> EVM ()

Ask the SMT solver to provide a concrete model for val iff a unique model exists

askSMT :: CodeLocation -> (SBool, Whiff) -> (Bool -> EVM ()) -> EVM ()

Construct SMT Query and halt execution until resolved

fetchAccount :: Addr -> (Contract -> EVM ()) -> EVM ()

Construct RPC Query and halt execution until resolved

readStorage :: Storage -> SymWord -> Maybe SymWord

writeStorage :: SymWord -> SymWord -> Storage -> Storage

accessStorage

Arguments

:: Addr

Contract address

-> SymWord

Storage slot key

-> (SymWord -> EVM ())

Continuation

-> EVM ()

accountExists :: Addr -> VM -> Bool

accountEmpty :: Contract -> Bool

How to finalize a transaction

finalize :: EVM ()

loadContract :: Addr -> EVM ()

Loads the selected contract as the current contract to execute

limitStack :: Int -> EVM () -> EVM ()

notStatic :: EVM () -> EVM ()

burn :: Integer -> EVM () -> EVM ()

Burn gas, failing if insufficient gas is available We use the Integer type to avoid overflows in intermediate calculations and throw if the value won't fit into a uint64

forceConcreteAddr :: SAddr -> (Addr -> EVM ()) -> EVM ()

forceConcrete :: SymWord -> (Word -> EVM ()) -> EVM ()

forceConcrete2 :: (SymWord, SymWord) -> ((Word, Word) -> EVM ()) -> EVM ()

forceConcrete3 :: (SymWord, SymWord, SymWord) -> ((Word, Word, Word) -> EVM ()) -> EVM ()

forceConcrete4 :: (SymWord, SymWord, SymWord, SymWord) -> ((Word, Word, Word, Word) -> EVM ()) -> EVM ()

forceConcrete5 :: (SymWord, SymWord, SymWord, SymWord, SymWord) -> ((Word, Word, Word, Word, Word) -> EVM ()) -> EVM ()

forceConcrete6 :: (SymWord, SymWord, SymWord, SymWord, SymWord, SymWord) -> ((Word, Word, Word, Word, Word, Word) -> EVM ()) -> EVM ()

forceConcreteBuffer :: Buffer -> (ByteString -> EVM ()) -> EVM ()

Substate manipulation

refund :: Integer -> EVM ()

unRefund :: Integer -> EVM ()

touchAccount :: Addr -> EVM ()

selfdestruct :: Addr -> EVM ()

accessAndBurn :: Addr -> EVM () -> EVM ()

accessAccountForGas :: Addr -> EVM Bool

returns a wrapped boolean- if true, this address has been touched before in the txn (warm gas cost as in EIP 2929) otherwise cold

accessStorageForGas :: Addr -> SymWord -> EVM Bool

returns a wrapped boolean- if true, this slot has been touched before in the txn (warm gas cost as in EIP 2929) otherwise cold

Cheat codes

cheatCode :: Addr

cheat :: (?op :: Word8) => (Word, Word) -> (Word, Word) -> EVM ()

type CheatAction = Word -> Word -> Buffer -> EVM ()

cheatActions :: Map Word32 CheatAction

ethsign :: PrivateKey -> Digest Keccak_256 -> Signature

Hack deterministic signing, totally insecure...

General call implementation ("delegateCall")

delegateCall :: (?op :: Word8) => Contract -> Word -> SAddr -> SAddr -> Word -> Word -> Word -> Word -> Word -> [SymWord] -> (Addr -> EVM ()) -> EVM ()

collision :: Maybe Contract -> Bool

create :: (?op :: Word8) => Addr -> Contract -> Word -> Word -> [SymWord] -> Addr -> Buffer -> EVM ()

replaceCode :: Addr -> ContractCode -> EVM ()

Replace a contract's code, like when CREATE returns from the constructor code.

replaceCodeOfSelf :: ContractCode -> EVM ()

resetState :: EVM ()

VM error implementation

vmError :: Error -> EVM ()

underrun :: EVM ()

data FrameResult

A stack frame can be popped in three ways.

Constructors

FrameReturned Buffer

STOP, RETURN, or no more code

FrameReverted Buffer

REVERT

FrameErrored Error

Any other error

Instances

Show FrameResult

Defined in EVM

Methods

showsPrec :: Int -> FrameResult -> ShowS

show :: FrameResult -> String

showList :: [FrameResult] -> ShowS

finishFrame :: FrameResult -> EVM ()

This function defines how to pop the current stack frame in either of the ways specified by FrameResult.

It also handles the case when the current stack frame is the only one; in this case, we set the final _result of the VM execution.

Memory helpers

accessUnboundedMemoryRange :: FeeSchedule Integer -> Word -> Word -> EVM () -> EVM ()

accessMemoryRange :: FeeSchedule Integer -> Word -> Word -> EVM () -> EVM ()

accessMemoryWord :: FeeSchedule Integer -> Word -> EVM () -> EVM ()

copyBytesToMemory :: Buffer -> Word -> Word -> Word -> EVM ()

copyCallBytesToMemory :: Buffer -> Word -> Word -> Word -> EVM ()

readMemory :: Word -> Word -> VM -> Buffer

word256At :: Functor f => Word -> (SymWord -> f SymWord) -> Buffer -> f Buffer

Tracing

withTraceLocation :: MonadState VM m => TraceData -> m Trace

pushTrace :: TraceData -> EVM ()

insertTrace :: TraceData -> EVM ()

popTrace :: EVM ()

zipperRootForest :: TreePos Empty a -> Forest a

traceForest :: VM -> Forest Trace

traceLog :: MonadState VM m => Log -> m ()

Stack manipulation

push :: Word -> EVM ()

pushSym :: SymWord -> EVM ()

stackOp1 :: (?op :: Word8) => (SymWord -> Integer) -> (SymWord -> SymWord) -> EVM ()

stackOp2 :: (?op :: Word8) => ((SymWord, SymWord) -> Integer) -> ((SymWord, SymWord) -> SymWord) -> EVM ()

stackOp3 :: (?op :: Word8) => ((SymWord, SymWord, SymWord) -> Integer) -> ((SymWord, SymWord, SymWord) -> SymWord) -> EVM ()

Bytecode data functions

checkJump :: Integral n => n -> [SymWord] -> EVM ()

opSize :: Word8 -> Int

mkOpIxMap :: Buffer -> Vector Int

vmOp :: VM -> Maybe Op

vmOpIx :: VM -> Maybe Int

opParams :: VM -> Map String SymWord

readOp :: Word8 -> Buffer -> Op

mkCodeOps :: Buffer -> Vector (Int, Op)

Gas cost calculation helpers

costOfCall :: FeeSchedule Integer -> Bool -> Word -> Word -> Word -> Addr -> EVM (Integer, Integer)

costOfCreate :: FeeSchedule Integer -> Word -> Word -> (Integer, Integer)

concreteModexpGasFee :: ByteString -> Integer

costOfPrecompile :: FeeSchedule Integer -> Addr -> Buffer -> Integer

memoryCost :: FeeSchedule Integer -> Integer -> Integer

Arithmetic

ceilDiv :: (Num a, Integral a) => a -> a -> a

allButOne64th :: (Num a, Integral a) => a -> a

log2 :: FiniteBits b => b -> Int

Emacs setup