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create-terminate-context.zkasm
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create-terminate-context.zkasm
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/**
* @link [https://www.evm.codes/#00?fork=berlin]
* @zk-counters
* @process-opcode
* - stack input: none
* - stack output: none
*/
opSTOP:
; check if first context
; if origin ctx is 0, end tx
$ => B :MLOAD(originCTX), JMPZ(handleGas)
; else handle finish ctx
$ => A :MLOAD(gasRefund)
; check if is a create call
$ => C :MLOAD(isCreate)
; set 1 to D, default stack return in stop code
1 => D
C :JMPZ(opSTOPend)
; if is a create, return created contract address
$ => D :MLOAD(createContractAddress)
opSTOPend:
; move to origin ctx
B => CTX
CTX :MSTORE(currentCTX)
; restore retDataCTX, no return data in stop
0 :MSTORE(retDataCTX)
; handle gas reund
$ => B :MLOAD(gasCTX)
A :MSTORE(gasRefund)
GAS + B => GAS
; restore SP and PC from origin CTX
$ => SP :MLOAD(lastSP)
$ => PC :MLOAD(lastPC)
; store stack output
D :MSTORE(SP++)
; decrease depth
$ => A :MLOAD(depth)
A - 1 :MSTORE(depth), JMP(readCode)
/**
* @link [https://www.evm.codes/#f0?fork=berlin]
* @zk-counters
* - 32 arith
* - 32 binary
* - 2 mem align
* - 510 poseidon
* - 600 steps
* @process-opcode
* - stack input: [value, offset, size]
* - stack output: [address]
*/
opCREATE:
; checks zk-counters
%MAX_CNT_MEM_ALIGN - CNT_MEM_ALIGN - 2 :JMPN(outOfCountersMemalign)
%MAX_CNT_ARITH - CNT_ARITH - 32 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 32 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; check out-of-gas
GAS - %CREATE_GAS => GAS :JMPN(outOfGas)
GAS :MSTORE(gasCall)
; increase depth
$ => A :MLOAD(depth)
A + 1 :MSTORE(depth)
; check stack underflow
SP - 3 :JMPN(stackUnderflow)
; check is static
$ => A :MLOAD(isStaticCall), JMPNZ(invalidStaticTx)
SP - 1 => SP
$ => D :MLOAD(SP--); [value => D]
D :MSTORE(valueCall)
$ => E :MLOAD(SP--); [offset => E]
E :MSTORE(argsOffsetCall)
$ => C :MLOAD(SP); [size => C]
C :MSTORE(argsLengthCall)
; store lastMemOffset for memory expansion gas cost
E :MSTORE(lastMemOffset)
; store lastMemLength for memory expansion gas cost
; compute memory expansion gas cost
C :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; store current CTX to auxiliary var for later usage
CTX :MSTORE(originAuxCTX)
; check if source address has enough balance to send to the new account
$ => A :MLOAD(storageAddr)
; set key for smt balance query
%SMT_KEY_BALANCE => B
; 3rd parameter does not apply to nonce or balance
0 => C
; balance in A
$ => A :SLOAD
D => B
$ :LT,JMPC(opCreateFail)
; check nonce overlow
$ => A :MLOAD(storageAddr)
; set key for smt nonce query
%SMT_KEY_NONCE => B
; nonce in B
$ => B :SLOAD
A => C
%MAX_NONCE => A
$ :EQ,JMPC(opCreateFail)
;change to a new CTX
SP :MSTORE(lastSP)
PC :MSTORE(lastPC)
; increase used contexts counter
$ => A :MLOAD(lastCtxUsed)
A+1 => CTX :MSTORE(lastCtxUsed)
CTX :MSTORE(currentCTX)
1 :MSTORE(isCreateContract)
1 :MSTORE(isCreate)
; set origin CTX to this new CTX
$ => A :MLOAD(originAuxCTX)
A :MSTORE(originCTX)
; get nonce and update SR
B :MSTORE(txNonce)
; get nonce length bytes
:CALL(getLenBytes); in: [B: value] out: [A: value bytes length]
A :MSTORE(lengthNonce)
; increase nonce
B + 1 => D
C => A
; set key for smt nonce query
%SMT_KEY_NONCE => B
0 => C
$ => SR :SSTORE
; compute gas send in call
SR :MSTORE(initSR), CALL(computeGasSendCall); in: [gasCall: gas sent to call] out: [A: min( requested_gas , all_but_one_64th(63/64))]
; return to origin CTX to set storage addr, gasRefund and gasCTX
$ => CTX :MLOAD(originCTX)
$ => B :MLOAD(storageAddr)
$ => C :MLOAD(gasRefund)
GAS - A :MSTORE(gasCTX)
$ => CTX :MLOAD(currentCTX)
; update GAS to computed gas send call
A => GAS
B :MSTORE(txSrcAddr)
; copy calldata from origin CTX to current CTX
C :MSTORE(gasRefund), CALL(copySP)
; set CTX var values
$ => A :MLOAD(argsLengthCall)
A :MSTORE(txCalldataLen)
$ => A :MLOAD(valueCall)
; Save touched root when a new context is created
A :MSTORE(txValue), CALL(checkpointTouched)
:JMP(txType)
opCreateFail:
0 :MSTORE(retDataCTX)
0 :MSTORE(SP++), JMP(readCode); [0 => SP]
/**
* @link [https://www.evm.codes/#f1?fork=berlin]
* @zk-counters
* - 32 arith
* - 32 binary
* - 510 poseidon
* - 1200 steps
* @process-opcode
* - stack input: [gas, address, value, argsOffset, argsSize, retOffset, retSize]
* - stack output: [success]
*/
opCALL:
; checks zk-counters
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; increase depth
$ => A :MLOAD(depth)
A + 1 :MSTORE(depth)
; check stack underflow
SP - 7 :JMPN(stackUnderflow)
SP - 1 => SP
; store current CTX to auxiliary var for later usage
CTX :MSTORE(originAuxCTX)
; store gas call
$ => A :MLOAD(SP--); [gas => A]
A :MSTORE(gasCall)
$ => A :MLOAD(SP--), CALL(maskAddress); [address => A]; in: [A: address] out: [A: masked address]
; store address call
; Mask address to 20 bytes
A :MSTORE(addrCall)
; store value call
$ => A :MLOAD(SP--); [value => A]
A :MSTORE(valueCall)
; if is static and value is not 0 -> revert
$ => B :MLOAD(isStaticCall), JMPZ(opCALL2)
0 => B
$ :EQ,JMPC(opCALL2, invalidStaticTx)
opCALL2:
; store bytes offset int the memory, the calldata of the subcontext
$ => A :MLOAD(SP--); [argsOffset => A]
A :MSTORE(argsOffsetCall)
; store lastMemOffset for memory expansion gas cost
A :MSTORE(lastMemOffset)
; byte size to copy, size of the calldata of the subcontext
$ => C :MLOAD(SP--); [argsSize => C]
C :MSTORE(argsLengthCall)
; store lastMemLength for memory expansion gas cost
C :MSTORE(lastMemLength)
; compute memory expansion gas cost
:CALL(saveMem); in: [lastMemOffset, lastMemLength]
; store byte offset in the memory in bytes, where to store the return data of the sub context
$ => B :MLOAD(SP--); [retOffset => B]
B :MSTORE(lastMemOffset)
; store byte size to copy (size of the return data)
$ => D :MLOAD(SP); [retSize => D]
; compute memory expansion gas cost of the return value
D :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; checks zk-counters
%MAX_CNT_ARITH - CNT_ARITH - 32 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 32 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400:JMPN(outOfCountersStep)
$ => B :MLOAD(lastMemOffset)
; check if an address is cold. If it is, add it to the touched tree
$ => A :MLOAD(addrCall), CALL(isColdAddress); in: [A: address] out: [D: 0 if warm, 1 if cold]
;gas_cost = memory_expansion_cost + code_execution_cost + address_access_cost + positive_value_cost + value_to_empty_account_cost
; Calculate address_access_cost: 100 for warm account, 2600 for cold account
GAS - %WARM_STORGE_READ_GAS - D * %COLD_ACCOUNT_ACCESS_COST_RED => GAS :JMPN(outOfGas)
; Calculate positive_value_cost, if value call > 0 -> 9000
$ => B :MLOAD(valueCall)
0 => A
$ :EQ,JMPC(opCALLend)
GAS - %CALL_VALUE_TRANSFER_GAS => GAS :JMPN(outOfGas)
; if destAddress is an empty account, we should add 25k of gas to base cost
$ => E :MLOAD(addrCall), CALL(isEmptyAccount); in: [E: address] out: [E: 0 if is not empty, 1 if is empty]
GAS - %CALL_NEW_ACCOUNT_GAS*E => GAS :JMPN(outOfGas)
opCALLend:
; setup vars for next CTX
$ => B :MLOAD(lastMemOffset)
$ => D :MLOAD(lastMemLength)
$ => C :MLOAD(storageAddr)
$ => E :MLOAD(gasRefund)
SP :MSTORE(lastSP)
PC :MSTORE(lastPC)
; increase CTX
$ => A :MLOAD(lastCtxUsed)
A+1 => CTX :MSTORE(lastCtxUsed)
CTX :MSTORE(currentCTX)
$ => A :MLOAD(originAuxCTX)
A :MSTORE(originCTX)
C :MSTORE(txSrcAddr)
E :MSTORE(gasRefund)
SR :MSTORE(initSR)
$ => A :MLOAD(addrCall)
A :MSTORE(txDestAddr)
A :MSTORE(storageAddr)
B :MSTORE(retCallOffset)
D :MSTORE(retCallLength)
$ => B :MLOAD(valueCall)
B :MSTORE(txValue)
0 => A
; compute gas send in call
$ => C :LT, CALL(computeGasSendCall); in: [gasCall: gas sent to call] out: [A: min( requested_gas , all_but_one_64th(63/64))]
$ => CTX :MLOAD(originCTX)
GAS - A :MSTORE(gasCTX)
; add estipend (2300) in case of tx with value
A + %CALL_STIPEND*C => A
; move is static bool value to following CTX
$ => D :MLOAD(isStaticCall)
$ => CTX :MLOAD(currentCTX)
D :MSTORE(isStaticCall)
; update GAS to computed gas send call
A => GAS
$ => A :MLOAD(argsLengthCall)
; copy calldata from origin CTX to current CTX
A :MSTORE(txCalldataLen), CALL(copySP)
; save touched root when a new context is created
:CALL(checkpointTouched)
:JMP(txType)
/**
* @link [https://www.evm.codes/#f1?fork=berlin]
* @zk-counters
* - 32 arith
* - 32 binary
* - 510 poseidon
* - 1200 steps
* @process-opcode
* - stack input: [gas, address, value, argsOffset, argsSize, retOffset, retSize]
* - stack output: [success]
*/
opCALLCODE:
; checks zk-counters
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; increase depth
$ => A :MLOAD(depth)
A + 1 :MSTORE(depth)
; check stack underflow
SP - 7 :JMPN(stackUnderflow)
SP - 1 => SP
; store current CTX to auxiliary var for later usage
CTX :MSTORE(originAuxCTX)
; store gas call
$ => A :MLOAD(SP--); [gas => A]
A :MSTORE(gasCall)
; store address call
; Mask address to 20 bytes
$ => A :MLOAD(SP--), CALL(maskAddress); [address => A]; in: [A: address] out: [A: masked address]
A :MSTORE(addrCall)
; store value call
$ => A :MLOAD(SP--); [value => A]
A :MSTORE(valueCall)
; store bytes offset int the memory, the calldata of the subcontext
$ => A :MLOAD(SP--); [argsOffset => A]
A :MSTORE(argsOffsetCall)
; store lastMemOffset for memory expansion gas cost
A :MSTORE(lastMemOffset)
; byte size to copy, size of the calldata of the subcontext
$ => C :MLOAD(SP--); [argsSize => C]
C :MSTORE(argsLengthCall)
; store lastMemLength for memory expansion gas cost
; compute memory expansion gas cost
C :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; Store byte offset in the memory in bytes, where to store the return data of the sub context.
$ => B :MLOAD(SP--); [retOffset => B]
B :MSTORE(lastMemOffset)
; Store byte size to copy (size of the return data).
$ => D :MLOAD(SP); [retSize => D]
; compute memory expansion gas cost of the return value
D :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; checks zk-counters
%MAX_CNT_ARITH - CNT_ARITH - 32 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 32 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400:JMPN(outOfCountersStep)
; check if an address is cold. If it is, add it to the touched tree
$ => A :MLOAD(addrCall), CALL(isColdAddress); in: [A: address] out: [D: 0 if warm, 1 if cold]
;gas_cost = memory_expansion_cost + code_execution_cost + address_access_cost + positive_value_cost
; Calculate address_access_cost: 100 for warm account, 2600 for cold account
GAS - %WARM_STORGE_READ_GAS - D * %COLD_ACCOUNT_ACCESS_COST_RED => GAS :JMPN(outOfGas)
; Calculate positive_value_cost, if value call > 0 -> 9000
$ => B :MLOAD(valueCall)
0 => A
$ :EQ,JMPC(opCALLCODEend)
; Substract gas if the call has value
GAS - %CALL_VALUE_TRANSFER_GAS => GAS :JMPN(outOfGas)
opCALLCODEend:
; setup vars for next CTX
$ => B :MLOAD(lastMemOffset)
$ => D :MLOAD(lastMemLength)
$ => E :MLOAD(storageAddr)
$ => C :MLOAD(gasRefund)
SP :MSTORE(lastSP)
PC :MSTORE(lastPC)
; increase CTX
$ => A :MLOAD(lastCtxUsed)
A+1 => CTX :MSTORE(lastCtxUsed)
CTX :MSTORE(currentCTX)
$ => A :MLOAD(originAuxCTX)
A :MSTORE(originCTX)
E :MSTORE(txSrcAddr)
E :MSTORE(storageAddr)
C :MSTORE(gasRefund)
SR :MSTORE(initSR)
$ => A :MLOAD(addrCall)
A :MSTORE(txDestAddr)
B :MSTORE(retCallOffset)
D :MSTORE(retCallLength)
$ => B :MLOAD(valueCall)
B :MSTORE(txValue)
0 => A
; compute gas send in call
$ => C :LT, CALL(computeGasSendCall); in: [gasCall: gas sent to call] out: [A: min( requested_gas , all_but_one_64th(63/64))]
$ => CTX :MLOAD(originCTX)
GAS - A :MSTORE(gasCTX)
; Add estipend (2300) in case of tx with value
A + %CALL_STIPEND*C => A
; move is static bool value to following CTX
$ => D :MLOAD(isStaticCall)
$ => CTX :MLOAD(currentCTX)
; update GAS to computed gas send call
A => GAS
D :MSTORE(isStaticCall)
$ => A :MLOAD(argsLengthCall)
; copy calldata from origin CTX to current CTX
A :MSTORE(txCalldataLen), CALL(copySP)
; Save touched root when a new context is created
:CALL(checkpointTouched)
:JMP(txType)
/**
* @link [https://www.evm.codes/#f3?fork=berlin]
* @zk-counters
* - 32 arith
* - 32 binary
* - 510 poseidon
* - 600 steps
* @process-opcode
* - stack input: [offset, size]
* - stack output: none
*/
opRETURN:
; check stack underflow
SP - 2 => SP :JMPN(stackUnderflow)
$ => E :MLOAD(SP+1); [offset => E]
$ => C :MLOAD(SP); [size => C]
; checks zk-counters
%MAX_CNT_ARITH - CNT_ARITH - 32 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 32 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; store return data values
E :MSTORE(retDataOffset)
C :MSTORE(retDataLength)
; store lastMemOffset for memory expansion gas cost
E :MSTORE(lastMemOffset)
; store lastMemLength for memory expansion gas cost
; compute memory expansion gas cost
C :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; check is a create
$ => D :MLOAD(isCreateContract), JMPNZ(opRETURNdeploy)
; reduce CTX
; if origin ctx is 0, end tx
$ => B :MLOAD(originCTX), JMPZ(handleGas)
; handle gas refund
$ => B :MLOAD(gasRefund)
$ => A :MLOAD(currentCTX)
$ => CTX :MLOAD(originCTX)
; set return data context values to origin context
A :MSTORE(retDataCTX)
B :MSTORE(gasRefund)
$ => B :MLOAD(gasCTX)
B + GAS => GAS
; return to current CTX
$ => CTX :MLOAD(currentCTX)
$ => D :MLOAD(retCallLength)
C => A
D => B
; set smallest return length between retCallLength and lastMemLength
$ :LT,JMPC(preRETURN32)
D => C
preRETURN32:
$ => B :MLOAD(retCallOffset)
; Copy from memory current CTX to memory origin CTX
opRETURN32:
; checks dynamic zk-counters
%MAX_CNT_BINARY - CNT_BINARY - 10 :JMPN(outOfCountersBinary)
%MAX_CNT_STEPS - STEP - 200 :JMPN(outOfCountersStep)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
C :JMPZ(opRETURNend)
C - 32 :JMPN(opRETURNfinal)
; load first 32 bytes from memory at current CTX
:CALL(MLOAD32); in: [E: offset] out: [A: value, E: new offset]
E => D
; load origin CTX
$ => CTX :MLOAD(originCTX)
B => E
; set bytesToStore with value to use in MSTORE
; store 32 bytes at origin CTX
A :MSTORE(bytesToStore), CALL(MSTORE32); in: [bytesToStore, E: offset] out: [E: new offset]
E => B
D => E
C - 32 => C
; restore current TX
$ => CTX :MLOAD(currentCTX), JMP(opRETURN32)
opRETURNfinal:
; load last bytes
:CALL(MLOADX); in: [E: offset, C: length] out: [A: value, E: new offset]
$ => CTX :MLOAD(originCTX)
B => E
; store last bytes
A :MSTORE(bytesToStore), CALL(MSTOREX); in: [bytesToStore, E: offset, C: length] out: [E: new offset]
$ => CTX :MLOAD(currentCTX)
opRETURNend:
; decrease CTX
$ => CTX :MLOAD(originCTX)
CTX :MSTORE(currentCTX)
; restore origin CTX values
$ => SP :MLOAD(lastSP)
$ => PC :MLOAD(lastPC)
1 :MSTORE(SP++); [1 => SP]
; decrease depth
$ => A :MLOAD(depth)
A - 1 :MSTORE(depth), JMP(readCode)
opRETURNdeploy:
; code size limit = 0x6000
%CODE_SIZE_LIMIT - C :JMPN(invalidCodeSize)
;code_deposit_cost = 200 * returned_code_size
GAS - %RETURN_GAS_COST * C => GAS :JMPN(outOfGas)
; check if first context
$ => B :MLOAD(originCTX), JMPNZ(opRETURNcreate, endDeploy)
opRETURNcreate:
; checks zk-counters
%MAX_CNT_ARITH - CNT_ARITH - 192 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 192 :JMPN(outOfCountersBinary)
%MAX_CNT_MEM_ALIGN - CNT_MEM_ALIGN - 2 :JMPN(outOfCountersMemalign)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 1020 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; save offset memory and length to compute contract hash
E :MSTORE(memOffsetLinearPoseidon)
C :MSTORE(memSizeLinearPoseidon)
; decrease context and set values
CTX :MSTORE(currentCTX)
$ => B :MLOAD(gasRefund)
$ => CTX :MLOAD(originCTX)
B :MSTORE(gasRefund)
$ => B :MLOAD(gasCTX)
B + GAS => GAS
$ => CTX :MLOAD(currentCTX)
$ => A :MLOAD(txSrcAddr)
$ => D :MLOAD(txNonce)
; set bytecode length and read bytecode first byte
$ => A :MLOAD(createContractAddress), CALL(checkBytecodeStartsEF)
; check bytecode first byte != 0xEF
$ :MLOAD(startsWithEF), JMPNZ(invalidCodeStartsEF)
; set key for smt smart contract length query
%SMT_KEY_SC_LENGTH => B
C => D
0 => C
; get bytecode and hash it
$ => SR :SSTORE, CALL(hashPoseidonLinearFromMemory); in: [memOffsetLinearPoseidon, memSizeLinearPoseidon], out: [D: resulting linear poseidon]
$ => A :MLOAD(createContractAddress)
0 => C
; set key for smt smart contract bytecode query
%SMT_KEY_SC_CODE => B
$ => SR :SSTORE
opRETURNcreateEnd:
; return to origin CTX
$ => A :MLOAD(createContractAddress)
$ => CTX :MLOAD(originCTX)
CTX :MSTORE(currentCTX)
0 :MSTORE(retDataCTX)
; set SP and PC
$ => SP :MLOAD(lastSP)
$ => PC :MLOAD(lastPC)
A :MSTORE(SP++); [createContractAddress(A) => SP]
; decrease depth
$ => A :MLOAD(depth)
A - 1 :MSTORE(depth), JMP(readCode)
/**
* @link [https://www.evm.codes/#f4?fork=berlin]
* @zk-counters
* - 32 arith
* - 32 binary
* - 510 poseidon
* - 1200 steps
* @process-opcode
* - stack input: [gas, address, argsOffset, argsSize, retOffset, retSize]
* - stack output: [success]
*/
opDELEGATECALL:
; checks zk-counters
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; increase depth
$ => A :MLOAD(depth)
A + 1 :MSTORE(depth)
; check stack underflow
SP - 6 :JMPN(stackUnderflow)
SP - 1 => SP
; store current CTX to auxiliary var for later usage
CTX :MSTORE(originAuxCTX)
; store gas call
$ => A :MLOAD(SP--); [gas => A]
A :MSTORE(gasCall)
; store address call
$ => A :MLOAD(SP--); [address => A]
; Mask address to 20 bytes
:CALL(maskAddress); in: [A: address] out: [A: masked address]
A :MSTORE(addrCall)
; store bytes offset int the memory, the calldata of the subcontext
$ => A :MLOAD(SP--)
A :MSTORE(argsOffsetCall); [argsOffset => A]
; store lastMemOffset for memory expansion gas cost
A :MSTORE(lastMemOffset)
; byte size to copy, size of the calldata of the subcontext
$ => C :MLOAD(SP--); [argsSize => C]
C :MSTORE(argsLengthCall)
; store lastMemLength for memory expansion gas cost
; mem expansion gas cost call args
C :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; Store byte offset in the memory in bytes, where to store the return data of the sub context.
$ => B :MLOAD(SP--); [retOffset => B]
B :MSTORE(lastMemOffset)
; Store byte size to copy (size of the return data).
$ => E :MLOAD(SP); [retSize => D]
; Mem expansion gas cost return args
E :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; checks zk-counters
%MAX_CNT_ARITH - CNT_ARITH - 32 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 32 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400:JMPN(outOfCountersStep)
$ => B :MLOAD(lastMemOffset)
; check if an address is cold. If it is, add it to the touched tree
$ => A :MLOAD(addrCall)
:CALL(isColdAddress); in: [A: address] out: [D: 0 if warm, 1 if cold]
;gas_cost = base_gas + gas_sent_with_call
GAS - %WARM_STORGE_READ_GAS - D * %COLD_ACCOUNT_ACCESS_COST_RED => GAS :JMPN(outOfGas)
; transition to new CTX
$ => C :MLOAD(txSrcAddr)
$ => D :MLOAD(storageAddr)
SP :MSTORE(lastSP)
PC :MSTORE(lastPC)
; increase CTX
$ => A :MLOAD(lastCtxUsed)
A+1 => CTX :MSTORE(lastCtxUsed)
CTX :MSTORE(currentCTX)
$ => A :MLOAD(originAuxCTX)
A :MSTORE(originCTX)
; set vars for new CTX
C :MSTORE(txSrcAddr)
D :MSTORE(storageAddr)
1 :MSTORE(isDelegateCall)
SR :MSTORE(initSR)
$ => A :MLOAD(addrCall)
A :MSTORE(txDestAddr)
B :MSTORE(retCallOffset)
; compute gas send in call
E :MSTORE(retCallLength), CALL(computeGasSendCall); in: [gasCall: gas sent to call] out: [A: min( requested_gas , all_but_one_64th(63/64))]
$ => CTX :MLOAD(originCTX)
GAS - A :MSTORE(gasCTX)
$ => B :MLOAD(txValue)
$ => C :MLOAD(gasRefund)
$ => D :MLOAD(isStaticCall)
$ => CTX :MLOAD(currentCTX)
D :MSTORE(isStaticCall)
B :MSTORE(txValue)
C :MSTORE(gasRefund)
A => GAS
opDELEGATECALLend:
$ => A :MLOAD(argsLengthCall)
; copy calldata from origin CTX to current CTX
A :MSTORE(txCalldataLen), CALL(copySP)
; Save touched root when a new context is created
:CALL(checkpointTouched)
:JMP(txType)
/**
* @link [https://www.evm.codes/#f5?fork=berlin]
* @zk-counters
* - 32 arith
* - 32 binary
* - 2 mem align
* - 510 poseidon
* - 600 steps
* @process-opcode
* - stack input: [value, offset, size, salt]
* - stack output: [address]
*/
opCREATE2:
; checks zk-counters
%MAX_CNT_ARITH - CNT_ARITH - 32 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 32 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; check out-of-gas
GAS - %CREATE_2_GAS => GAS :JMPN(outOfGas)
; increase depth
$ => A :MLOAD(depth)
A + 1 :MSTORE(depth)
; check stack underflow
SP - 4 :JMPN(stackUnderflow)
; check is static
$ => A :MLOAD(isStaticCall), JMPNZ(invalidStaticTx)
SP - 1 => SP
$ => A :MLOAD(SP--); [value => D]
A :MSTORE(valueCall)
$ => E :MLOAD(SP--); [offset => E]
E :MSTORE(argsOffsetCall)
$ => C :MLOAD(SP--); [size => C]
C :MSTORE(argsLengthCall)
$ => D :MLOAD(SP); [salt => D]
; store lastMemOffset for memory expansion gas cost
E :MSTORE(lastMemOffset)
; store lastMemLength for memory expansion gas cost
; compute memory expansion gas cost
C :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; store current CTX to auxiliary var for later usage
CTX :MSTORE(originAuxCTX)
; cost to hash the initialisation code
${C+31} :MSTORE(arithA)
32 :MSTORE(arithB), CALL(divARITH); in: [arithA, arithB] out: [arithRes1: arithA/arithB, arithRes2: arithA%arithB]
$ => C :MLOAD(arithRes1)
GAS => A
6*C => B
$ :LT,JMPC(outOfGas)
A - B => GAS
GAS :MSTORE(gasCall)
; check correctness of Create: depth, can transfer, nonce overlfow,
; can transfer
$ => A :MLOAD(storageAddr)
; set key for smt balance query
%SMT_KEY_BALANCE => B
; 3rd parameter does not apply to nonce or balance
0 => C
; balance in A
$ => A :SLOAD
$ => B :MLOAD(valueCall)
$ :LT,JMPC(opCreateFail)
; check nonce overlow
$ => A :MLOAD(storageAddr)
; set key for smt nonce query
%SMT_KEY_NONCE => B
; nonce in B
$ => B :SLOAD
A => C
%MAX_NONCE => A
$ :EQ,JMPC(opCreateFail)
;change to a new CTX
SP :MSTORE(lastSP)
PC :MSTORE(lastPC)
; increase used contexts counter
$ => A :MLOAD(lastCtxUsed)
A+1 => CTX :MSTORE(lastCtxUsed)
CTX :MSTORE(currentCTX)
1 :MSTORE(isCreateContract)
1 :MSTORE(isCreate)
1 :MSTORE(isCreate2)
D :MSTORE(salt)
; set origin CTX to this new CTX
$ => A :MLOAD(originAuxCTX)
A :MSTORE(originCTX)
; get nonce & update SR
; get nonce length bytes
B :MSTORE(txNonce), CALL(getLenBytes); in: [B: value] out: [A: value bytes length]
A :MSTORE(lengthNonce)
; increase nonce
B + 1 => D
C => A
; set key for smt nonce query
%SMT_KEY_NONCE => B
0 => C
$ => SR :SSTORE
SR :MSTORE(initSR)
; compute gas send in call
A :MSTORE(txSrcAddr), CALL(computeGasSendCall); in: [gasCall: gas sent to call] out: [A: min( requested_gas , all_but_one_64th(63/64))]
$ => CTX :MLOAD(originCTX)
$ => C :MLOAD(gasRefund)
GAS - A :MSTORE(gasCTX)
$ => CTX :MLOAD(currentCTX)
C :MSTORE(gasRefund)
; update GAS to computed gas send call
; copy calldata from origin CTX to current CTX
A => GAS :CALL(copySP)
; set CTX var values
$ => A :MLOAD(argsLengthCall)
A :MSTORE(txCalldataLen)
$ => A :MLOAD(valueCall)
; Save touched root when a new context is created
A :MSTORE(txValue), CALL(checkpointTouched)
:JMP(txType)
/**
* @link [https://www.evm.codes/#fa?fork=berlin]
* @zk-counters
* - 32 arith
* - 32 binary
* - 510 poseidon
* - 1200 steps
* @process-opcode
* - stack input: [gas, address, argsOffset, argsSize, retOffset, retSize]
* - stack output: [success]
*/
opSTATICCALL:
; increase depth
$ => A :MLOAD(depth)
A + 1 :MSTORE(depth)
; check stack underflow
SP - 6 :JMPN(stackUnderflow)
SP - 1 => SP
; store current CTX to auxiliary var for later usage
CTX :MSTORE(originAuxCTX)
; store gas call
$ => A :MLOAD(SP--); [gas => A]
A :MSTORE(gasCall)
; mask address to 20 bytes
$ => A :MLOAD(SP--), CALL(maskAddress); [address => A]; in: [A: address] out: [A: masked address]
A :MSTORE(addrCall)
; store bytes offset int the memory, the calldata of the subcontext
$ => A :MLOAD(SP--); [argsOffset => A]
A :MSTORE(argsOffsetCall)
; store lastMemOffset for memory expansion gas cost
A :MSTORE(lastMemOffset)
; byte size to copy, size of the calldata of the subcontext
$ => B :MLOAD(SP--); [argsSize => B]
B :MSTORE(argsLengthCall)
; store lastMemLength for memory expansion gas cost
; compute memory expansion gas cost
B :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; store byte offset in the memory in bytes, where to store the return data of the sub context
$ => C :MLOAD(SP--); [retOffset => C]
C :MSTORE(lastMemOffset)
; store byte size to copy (size of the return data)
$ => E :MLOAD(SP); [retSize => E]
; compute memory expansion gas cost of the return value
E :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; checks zk-counters
%MAX_CNT_ARITH - CNT_ARITH - 32 :JMPN(outOfCountersArith)
%MAX_CNT_BINARY - CNT_BINARY - 32 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 510 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; check if an address is cold. If it is, add it to the touched tree
$ => A :MLOAD(addrCall), CALL(isColdAddress); in: [A: address] out: [D: 0 if warm, 1 if cold]
;gas_cost = base_gas + gas_sent_with_call
GAS - %WARM_STORGE_READ_GAS - D * %COLD_ACCOUNT_ACCESS_COST_RED => GAS :JMPN(outOfGas)
; setup vars for next CTX
$ => D :MLOAD(storageAddr)
$ => B :MLOAD(gasRefund)
SP :MSTORE(lastSP)
PC :MSTORE(lastPC)
; increase CTX
$ => A :MLOAD(lastCtxUsed)
A+1 => CTX :MSTORE(lastCtxUsed)
CTX :MSTORE(currentCTX)
$ => A :MLOAD(originAuxCTX)
A :MSTORE(originCTX)
B :MSTORE(gasRefund)
0 :MSTORE(txValue)
1 :MSTORE(isStaticCall)
D :MSTORE(txSrcAddr)
SR :MSTORE(initSR)
$ => A :MLOAD(addrCall)
A :MSTORE(txDestAddr)
A :MSTORE(storageAddr)
C :MSTORE(retCallOffset)
; compute gas send in call
E :MSTORE(retCallLength), CALL(computeGasSendCall); in: [gasCall: gas sent to call] out: [A: min( requested_gas , all_but_one_64th(63/64))]
$ => CTX :MLOAD(originCTX)
GAS - A :MSTORE(gasCTX)
$ => CTX :MLOAD(currentCTX)
; update GAS to computed gas send call
A => GAS
$ => A :MLOAD(argsLengthCall)
; copy calldata from origin CTX to current CTX
A :MSTORE(txCalldataLen), CALL(copySP)
; save touched root when a new context is created
:CALL(checkpointTouched)
:JMP(txType)
/**
* @link [https://www.evm.codes/#fd?fork=berlin]
* @zk-counters
* - 1000 steps
* @process-opcode
* - stack input: [offset, size]
* - stack output: none
*/
opREVERT:
; checks zk-counters
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; check stack underflow
SP - 2 => SP :JMPN(stackUnderflow)
; load initSR to revert al state changes
; revert touched accounts
$ => SR :MLOAD(initSR), CALL(revertTouched)
$ => E :MLOAD(SP+1); [offset => E]
$ => C :MLOAD(SP); [size => C]
E :MSTORE(retDataOffset)
C :MSTORE(retDataLength)
; store lastMemOffset for memory expansion gas cost
E :MSTORE(lastMemOffset)
; store lastMemLength for memory expansion gas cost
; compute memory expansion gas cost
C :MSTORE(lastMemLength), CALL(saveMem); in: [lastMemOffset, lastMemLength]
; check if first context
$ => B :MLOAD(originCTX)
$${eventLog(onError, revert)}
0 :MSTORE(gasRefund)
; if origin ctx is 0, end tx
B :JMPZ(handleGas)
; decrease CTX
$ => A :MLOAD(currentCTX)
B => CTX
; add return data context value to origin context
A :MSTORE(retDataCTX)
; return left gas to origin CTX
$ => B :MLOAD(gasCTX)
GAS + B => GAS
A => CTX
$ => D :MLOAD(retCallLength)
C => A
D => B
$ :LT,JMPC(preREVERT32)
D => C
; copy from memory current CTX to memory origin CTX
preREVERT32:
$ => B :MLOAD(retCallOffset)
opREVERT32:
; checks zk-counters
%MAX_CNT_STEPS - STEP - 200 :JMPN(outOfCountersStep)
C :JMPZ(opREVERTend)
; load first 32 bytes from memory at current CTX
C - 32 :JMPN(opREVERTfinal)
:CALL(MLOAD32); in: [E: offset] out: [A: value, E: new offset]
E => D
$ => CTX :MLOAD(originCTX)
B => E
; set bytesToStore with value to use in MSTORE
; store 32 bytes at origin CTX
A :MSTORE(bytesToStore), CALL(MSTORE32); in: [bytesToStore, E: offset] out: [E: new offset]
E => B
D => E
C - 32 => C
; restore current CTX
$ => CTX :MLOAD(currentCTX), JMP(opREVERT32)
opREVERTfinal:
; copy last bytes
:CALL(MLOADX); in: [E: offset, C: length] out: [A: value, E: new offset]
$ => CTX :MLOAD(originCTX)
B => E
A :MSTORE(bytesToStore), CALL(MSTOREX); in: [bytesToStore, E: offset, C: length] out: [E: new offset]
$ => CTX :MLOAD(currentCTX)
opREVERTend:
; decrease CTX and restore SP and PC
$ => CTX :MLOAD(originCTX)
CTX :MSTORE(currentCTX)
$ => SP :MLOAD(lastSP)
$ => PC :MLOAD(lastPC)
0 :MSTORE(SP++); [0 => SP]
; decrease depth
$ => A :MLOAD(depth)
A - 1 :MSTORE(depth), JMP(readCode)
; SELFDESTRUCT is deprecated and EIP-4758 is implemented: https://eips.ethereum.org/EIPS/eip-4758
; SELFDESTRUCT is now SENDALL
/**
* @link [https://www.evm.codes/#ff?fork=berlin] (selfdestruct)
* @zk-counters
* - 10 binary
* - 2040 poseidon
* - 600 steps
* @process-opcode
* - stack input: [address]
* - stack output: none
*/
opSENDALL:
; checks zk-counters
%MAX_CNT_BINARY - CNT_BINARY - 10 :JMPN(outOfCountersBinary)
%MAX_CNT_POSEIDON_G - CNT_POSEIDON_G - 2040 :JMPN(outOfCountersPoseidon)
%MAX_CNT_STEPS - STEP - 400 :JMPN(outOfCountersStep)
; check out-of-gas
GAS - %SENDALL_GAS => GAS :JMPN(outOfGas)
; check stack underflow
SP - 1 => SP :JMPN(stackUnderflow)