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EIP-8024: DUPN, SWAPN, EXCHANGE opcodes #2874

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6ea0fa6
kproj/{schedule,evm}.md, kevm_pyk/{gst_to_kore,cli}.py: define the Am…
anvacaru Jul 13, 2026
a13da59
kproj/{evm,state-utils,serialization,driver}.md, kevm_pyk/gst_to_kore…
anvacaru Jul 13, 2026
16ac866
tests/execution-spec-tests: pin fixtures to tests-glamsterdam-devnet@…
anvacaru Jul 24, 2026
d3dfcac
kproj/schedule.md: add amsterdam blob schedule constants (target 14 /…
anvacaru Jul 17, 2026
eb96e6e
kevm-pyk/src/tests/utils.py: tolerate blank lines in skip-list files
anvacaru Jul 23, 2026
2c85203
kproj/evm.md, kevm_pyk/gst_to_kore.py: drop narrative comments
anvacaru Jul 24, 2026
7524832
update script description
anvacaru Jul 24, 2026
cd82c58
tests/execution-spec-tests/failing.llvm: sort failing fixtures
anvacaru Jul 24, 2026
2fbd62f
schedule.md: align schedule vars
anvacaru Jul 24, 2026
3c03c06
cleanups
anvacaru Jul 24, 2026
05446f7
kproj/{evm,schedule}.md: implement eip-8024 dupn/swapn/exchange
anvacaru Jul 16, 2026
123e178
formatting + renaming functions
anvacaru Jul 24, 2026
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2 changes: 2 additions & 0 deletions kevm-pyk/src/kevm_pyk/cli.py
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Expand Up @@ -1007,6 +1007,8 @@ def evm_chain_args(self) -> ArgumentParser:
'SHANGHAI',
'CANCUN',
'PRAGUE',
'OSAKA',
'AMSTERDAM',
)
modes = ('NORMAL', 'VMTESTS')

Expand Down
10 changes: 10 additions & 0 deletions kevm-pyk/src/kevm_pyk/gst_to_kore.py
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Expand Up @@ -34,7 +34,9 @@
'Frontier': 'FRONTIER',
'Homestead': 'HOMESTEAD',
'EIP150': 'TANGERINE_WHISTLE',
'TangerineWhistle': 'TANGERINE_WHISTLE',
'EIP158': 'SPURIOUS_DRAGON',
'SpuriousDragon': 'SPURIOUS_DRAGON',
'Byzantium': 'BYZANTIUM',
'Constantinople': 'CONSTANTINOPLE',
'ConstantinopleFix': 'PETERSBURG',
Expand All @@ -51,6 +53,12 @@
'CancunToPragueAtTime15k': 'PRAGUE',
'Osaka': 'OSAKA',
'PragueToOsakaAtTime15k': 'OSAKA',
'Amsterdam': 'AMSTERDAM',
'BPO2ToAmsterdamAtTime15k': 'AMSTERDAM',
'OsakaToBPO1AtTime15k': 'OSAKA',
'BPO1ToBPO2AtTime15k': 'OSAKA',
'BPO2ToBPO3AtTime15k': 'AMSTERDAM',
'BPO3ToBPO4AtTime15k': 'AMSTERDAM',
}

_GST_DISCARD_KEYS: Final = frozenset(
Expand All @@ -65,6 +73,8 @@
'hasBigInt',
'config',
'network',
'receipts',
'blockAccessList',
]
)
_GST_LOAD_KEYS: Final = frozenset(
Expand Down
16 changes: 11 additions & 5 deletions kevm-pyk/src/kevm_pyk/kproj/evm-semantics/driver.md
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Expand Up @@ -624,6 +624,7 @@ Here we check the other post-conditions associated with an EVM test.
SetItem("receiptTrie") SetItem("stateRoot") SetItem("timestamp")
SetItem("transactionsTrie") SetItem("uncleHash") SetItem("baseFeePerGas") SetItem("withdrawalsRoot")
SetItem("blobGasUsed") SetItem("excessBlobGas") SetItem("parentBeaconBlockRoot") SetItem("requestsHash")
SetItem("blockAccessListHash") SetItem("slotNumber")
)

rule <k> check "blockHeader" : { "bloom" : VALUE } => .K ... </k> <logsBloom> VALUE </logsBloom>
Expand All @@ -647,6 +648,8 @@ Here we check the other post-conditions associated with an EVM test.
rule <k> check "blockHeader" : { "excessBlobGas" : VALUE } => .K ... </k> <excessBlobGas> VALUE </excessBlobGas>
rule <k> check "blockHeader" : { "parentBeaconBlockRoot": VALUE } => .K ... </k> <beaconRoot> VALUE </beaconRoot>
rule <k> check "blockHeader" : { "requestsHash" : VALUE } => .K ... </k> <requestsRoot> VALUE </requestsRoot>
rule <k> check "blockHeader" : { "blockAccessListHash" : VALUE } => .K ... </k> <balHash> VALUE </balHash>
rule <k> check "blockHeader" : { "slotNumber" : VALUE } => .K ... </k> <slotNumber> VALUE </slotNumber>


rule <k> check "blockHeader" : { "hash": HASH:Bytes } => .K ...</k>
Expand All @@ -671,11 +674,14 @@ Here we check the other post-conditions associated with an EVM test.
<excessBlobGas> EB </excessBlobGas>
<beaconRoot> BR </beaconRoot>
<requestsRoot> RR </requestsRoot>
requires #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WR) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WR, UB, EB, BR) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WR, UB, EB, BR, RR) ==Int #asWord(HASH)
<balHash> BAL </balHash>
<slotNumber> SN </slotNumber>
requires #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WR) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WR, UB, EB, BR) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WR, UB, EB, BR, RR) ==Int #asWord(HASH)
orBool #blockHeaderHash(HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WR, UB, EB, BR, RR, BAL, SN) ==Int #asWord(HASH)

rule <k> check { "genesisBlockHeader" : BLOCKHEADER } => check "genesisBlockHeader" : BLOCKHEADER ... </k>
// ---------------------------------------------------------------------------------------------------------
Expand Down
80 changes: 78 additions & 2 deletions kevm-pyk/src/kevm_pyk/kproj/evm-semantics/evm.md
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Expand Up @@ -123,6 +123,8 @@ In the comments next to each cell, we've marked which component of the YellowPap
<excessBlobGas> 0 </excessBlobGas>
<beaconRoot> 0 </beaconRoot>
<requestsRoot> 0 </requestsRoot>
<balHash> 0 </balHash>
<slotNumber> 0 </slotNumber>

<ommerBlockHeaders> [ .JSONs ] </ommerBlockHeaders>
</block>
Expand Down Expand Up @@ -408,6 +410,9 @@ The `#next [_]` operator initiates execution by:
rule #stackNeeded(_QOP:QuadStackOp) => 4
rule #stackNeeded(DUP(N)) => N
rule #stackNeeded(SWAP(N)) => N +Int 1
rule #stackNeeded(DUPN) => 0
rule #stackNeeded(SWAPN) => 0
rule #stackNeeded(EXCHANGE) => 0
rule #stackNeeded(LOG(N)) => N +Int 2
rule #stackNeeded(_CSOP:CallSixOp) => 6
rule #stackNeeded(COP:CallOp) => 7 requires notBool isCallSixOp(COP)
Expand All @@ -433,6 +438,9 @@ The `#next [_]` operator initiates execution by:
rule #stackAdded(LOG(_)) => 0
rule #stackAdded(SWAP(N)) => N +Int 1
rule #stackAdded(DUP(N)) => N +Int 1
rule #stackAdded(DUPN) => 1
rule #stackAdded(SWAPN) => 0
rule #stackAdded(EXCHANGE) => 0
rule #stackAdded(_IOP:InvalidOp) => 0
rule #stackAdded(_OP) => 1 [owise]

Expand Down Expand Up @@ -558,8 +566,11 @@ The arguments to `PUSH` must be skipped over (as they are inline), and the opcod

syntax Int ::= #widthOp ( OpCode ) [symbol(#widthOp), function, total]
// ----------------------------------------------------------------------
rule #widthOp(PUSH(N)) => 1 +Int N
rule #widthOp(_) => 1 [owise]
rule #widthOp(PUSH(N)) => 1 +Int N
rule #widthOp(DUPN) => 2
rule #widthOp(SWAPN) => 2
rule #widthOp(EXCHANGE) => 2
rule #widthOp(_) => 1 [owise]
```

After executing a transaction, it's necessary to have the effect of the substate log recorded.
Expand Down Expand Up @@ -1150,6 +1161,64 @@ Some operators don't calculate anything, they just push the stack around a bit.
rule <k> DUP(N) WS:WordStack => #setStack ((WS [ N -Int 1 ]) : WS) ... </k>
rule <k> SWAP(N) (W0 : WS) => #setStack ((WS [ N -Int 1 ]) : (WS [ N -Int 1 := W0 ])) ... </k>

syntax StackOp ::= "DUPN" | "SWAPN" | "EXCHANGE"
// ------------------------------------------------
rule <k> DUPN WS:WordStack => #setStack ((WS [ #decodeSingle(#immByte(PGM, PCOUNT)) -Int 1 ]) : WS) ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires #validSingle(#immByte(PGM, PCOUNT)) andBool #decodeSingle(#immByte(PGM, PCOUNT)) <=Int #sizeWordStack(WS)
rule <k> DUPN WS:WordStack => #end EVMC_STACK_UNDERFLOW ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires #validSingle(#immByte(PGM, PCOUNT)) andBool #decodeSingle(#immByte(PGM, PCOUNT)) >Int #sizeWordStack(WS)
rule <k> DUPN _:WordStack => #end EVMC_INVALID_INSTRUCTION ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires notBool #validSingle(#immByte(PGM, PCOUNT))

rule <k> SWAPN (W0 : WS) => #setStack ((WS [ #decodeSingle(#immByte(PGM, PCOUNT)) -Int 1 ]) : (WS [ #decodeSingle(#immByte(PGM, PCOUNT)) -Int 1 := W0 ])) ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires #validSingle(#immByte(PGM, PCOUNT)) andBool #decodeSingle(#immByte(PGM, PCOUNT)) +Int 1 <=Int #sizeWordStack(W0 : WS)
rule <k> SWAPN WS:WordStack => #end EVMC_STACK_UNDERFLOW ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires #validSingle(#immByte(PGM, PCOUNT)) andBool #decodeSingle(#immByte(PGM, PCOUNT)) +Int 1 >Int #sizeWordStack(WS)
rule <k> SWAPN _:WordStack => #end EVMC_INVALID_INSTRUCTION ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires notBool #validSingle(#immByte(PGM, PCOUNT))

rule <k> EXCHANGE WS:WordStack => #setStack (WS [ #decodePairA(#immByte(PGM, PCOUNT)) := WS [ #decodePairB(#immByte(PGM, PCOUNT)) ] ] [ #decodePairB(#immByte(PGM, PCOUNT)) := WS [ #decodePairA(#immByte(PGM, PCOUNT)) ] ]) ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires #validPair(#immByte(PGM, PCOUNT)) andBool maxInt(#decodePairA(#immByte(PGM, PCOUNT)), #decodePairB(#immByte(PGM, PCOUNT))) <Int #sizeWordStack(WS)
rule <k> EXCHANGE WS:WordStack => #end EVMC_STACK_UNDERFLOW ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires #validPair(#immByte(PGM, PCOUNT)) andBool maxInt(#decodePairA(#immByte(PGM, PCOUNT)), #decodePairB(#immByte(PGM, PCOUNT))) >=Int #sizeWordStack(WS)
rule <k> EXCHANGE _:WordStack => #end EVMC_INVALID_INSTRUCTION ... </k>
<program> PGM </program> <pc> PCOUNT </pc>
requires notBool #validPair(#immByte(PGM, PCOUNT))

syntax Int ::= "#immByte" "(" Bytes "," Int ")" [function, total]
// -----------------------------------------------------------------
rule #immByte(PGM, PCOUNT) => #asWord(#range(PGM, PCOUNT +Int 1, 1))

syntax Int ::= "#decodeSingle" "(" Int ")" [function, total]
| "#decodePairA" "(" Int ")" [function, total]
| "#decodePairB" "(" Int ")" [function, total]
| "#decodePairA" "(" Int "," Int ")" [function, total]
| "#decodePairB" "(" Int "," Int ")" [function, total]
// -------------------------------------------------------------------
rule #decodeSingle(X) => (X +Int 145) modInt 256

rule #decodePairA(X) => #decodePairA((X xorInt 143) /Int 16, (X xorInt 143) modInt 16)
rule #decodePairA(Q, R) => Q +Int 1 requires Q <Int R
rule #decodePairA(Q, R) => R +Int 1 requires Q >=Int R

rule #decodePairB(X) => #decodePairB((X xorInt 143) /Int 16, (X xorInt 143) modInt 16)
rule #decodePairB(Q, R) => R +Int 1 requires Q <Int R
rule #decodePairB(Q, R) => 29 -Int Q requires Q >=Int R

syntax Bool ::= "#validSingle" "(" Int ")" [function, total]
| "#validPair" "(" Int ")" [function, total]
// ------------------------------------------------------------
rule #validSingle(X) => X <=Int 90 orBool X >=Int 128
rule #validPair(X) => X <=Int 81 orBool X >=Int 128

syntax PushOp ::= "PUSHZERO"
| PUSH ( Int ) [symbol(PUSH)]
// ---------------------------------------------
Expand Down Expand Up @@ -2190,6 +2259,7 @@ Precompiled Contracts
rule #precompiledAccountsUB(CANCUN) => 10
rule #precompiledAccountsUB(PRAGUE) => 17
rule #precompiledAccountsUB(OSAKA) => #precompiledAccountsUB(PRAGUE)
rule #precompiledAccountsUB(AMSTERDAM) => #precompiledAccountsUB(OSAKA)


syntax Set ::= #precompiledAccountsSet ( Schedule ) [symbol(#precompiledAccountsSet), function, total]
Expand Down Expand Up @@ -2990,6 +3060,9 @@ The intrinsic gas calculation mirrors the style of the YellowPaper (appendix H).
rule <k> #gasExec(SCHED, PUSH(_)) => Gverylow < SCHED > ... </k>
rule <k> #gasExec(SCHED, DUP(_) _) => Gverylow < SCHED > ... </k>
rule <k> #gasExec(SCHED, SWAP(_) _) => Gverylow < SCHED > ... </k>
rule <k> #gasExec(SCHED, DUPN _) => Gverylow < SCHED > ... </k>
rule <k> #gasExec(SCHED, SWAPN _) => Gverylow < SCHED > ... </k>
rule <k> #gasExec(SCHED, EXCHANGE _) => Gverylow < SCHED > ... </k>
rule <k> #gasExec(SCHED, BLOBHASH _) => Gverylow < SCHED > ... </k>

// Wlow
Expand Down Expand Up @@ -3333,6 +3406,9 @@ After interpreting the strings representing programs as a `WordStack`, it should
rule #dasmOpCode( 162, _ ) => LOG(2)
rule #dasmOpCode( 163, _ ) => LOG(3)
rule #dasmOpCode( 164, _ ) => LOG(4)
rule #dasmOpCode( 230, SCHED ) => DUPN requires Ghaseip8024 << SCHED >>
rule #dasmOpCode( 231, SCHED ) => SWAPN requires Ghaseip8024 << SCHED >>
rule #dasmOpCode( 232, SCHED ) => EXCHANGE requires Ghaseip8024 << SCHED >>
rule #dasmOpCode( 240, _ ) => CREATE
rule #dasmOpCode( 241, _ ) => CALL
rule #dasmOpCode( 242, _ ) => CALLCODE
Expand Down
26 changes: 23 additions & 3 deletions kevm-pyk/src/kevm_pyk/kproj/evm-semantics/schedule.md
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Expand Up @@ -31,8 +31,8 @@ module SCHEDULE
| "Ghaswarmcoinbase" | "Ghaswithdrawals" | "Ghastransient" | "Ghasmcopy"
| "Ghasbeaconroot" | "Ghaseip6780" | "Ghasblobbasefee" | "Ghasblobhash"
| "Ghasbls12msmdiscount" | "Ghashistory" | "Ghasrequests" | "Ghasauthority"
| "Ghasfloorcost" | "Ghasclz"
// -------------------------------------------------------------
| "Ghasfloorcost" | "Ghasclz" | "Ghaseip8024"
// ---------------------------------------------------------------------------------------
```

### Schedule Constants
Expand Down Expand Up @@ -183,6 +183,7 @@ A `ScheduleConst` is a constant determined by the fee schedule.
rule [GhasauthorityDefault]: Ghasauthority << DEFAULT >> => false
rule [GhasfloorcostDefault]: Ghasfloorcost << DEFAULT >> => false
rule [GhasclzDefault]: Ghasclz << DEFAULT >> => false
rule [Ghaseip8024Default]: Ghaseip8024 << DEFAULT >> => false
```

### Frontier Schedule
Expand Down Expand Up @@ -509,7 +510,26 @@ A `ScheduleConst` is a constant determined by the fee schedule.
rule [GhasclzOsaka]: Ghasclz << OSAKA >> => true
rule [SCHEDFLAGOsaka]: SCHEDFLAG << OSAKA >> => SCHEDFLAG << PRAGUE >>
requires notBool ( SCHEDFLAG ==K Ghasclz )


```

### Amsterdam Schedule

```k
syntax Schedule ::= "AMSTERDAM" [symbol(AMSTERDAM_EVM), smtlib(schedule_AMSTERDAM)]
// -----------------------------------------------------------------------------------
rule [GmaxblobgasAmsterdam]: Gmaxblobgas < AMSTERDAM > => 2752512
rule [GtargetblobgasAmsterdam]: Gtargetblobgas < AMSTERDAM > => 1835008
rule [BlobbasefeeupdatefractionAmsterdam]: Blobbasefeeupdatefraction < AMSTERDAM > => 11684671
rule [SCHEDCONSTAmsterdam]: SCHEDCONST < AMSTERDAM > => SCHEDCONST < OSAKA >
requires notBool ( SCHEDCONST ==K Gmaxblobgas
orBool SCHEDCONST ==K Gtargetblobgas
orBool SCHEDCONST ==K Blobbasefeeupdatefraction
)

rule [Ghaseip8024Amsterdam]: Ghaseip8024 << AMSTERDAM >> => true
rule [SCHEDFLAGAmsterdam]: SCHEDFLAG << AMSTERDAM >> => SCHEDFLAG << OSAKA >>
requires notBool ( SCHEDFLAG ==K Ghaseip8024 )
```

```k
Expand Down
17 changes: 17 additions & 0 deletions kevm-pyk/src/kevm_pyk/kproj/evm-semantics/serialization.md
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Expand Up @@ -128,6 +128,8 @@ Address/Hash Helpers
| #blockHeaderHash(Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes ) [function, symbol(blockHashHeaderBlobBeacon) ]
| #blockHeaderHash(Int , Int , Int , Int , Int , Int , Bytes, Int , Int , Int , Int , Int , Bytes, Int , Int , Int , Int , Int , Int , Int , Int ) [function, symbol(blockHeaderHashRequestsRoot) ]
| #blockHeaderHash(Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes) [function, symbol(blockHashHeaderRequestsRoot) ]
| #blockHeaderHash(Int , Int , Int , Int , Int , Int , Bytes, Int , Int , Int , Int , Int , Bytes, Int , Int , Int , Int , Int , Int , Int , Int , Int , Int ) [function, symbol(blockHeaderHashBALSlot)]
| #blockHeaderHash(Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes, Bytes) [function, symbol(blockHashHeaderBALSlot)]
// --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

rule #blockHeaderHash(HP:Bytes, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN)
Expand Down Expand Up @@ -199,6 +201,21 @@ Address/Hash Helpers
)
)
)

rule #blockHeaderHash(HP:Bytes, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WF, UB, EB, BR, RR, HA, SN)
=> #parseHexWord( Keccak256( #rlpEncode( [ HP, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WF, UB, EB, BR, RR, HA, SN] ) ) )

rule #blockHeaderHash(HP:Int, HO, HC, HR, HT, HE, HB, HD, HI, HL, HG, HS, HX, HM, HN, HF, WF, UB, EB, BR, RR, HA, SN)
=> #parseHexWord( Keccak256( #rlpEncode( [ #wordBytes(HP), #wordBytes(HO), #addrBytes(HC)
, #wordBytes(HR), #wordBytes(HT), #wordBytes(HE)
, HB, HD, HI, HL, HG, HS, HX
, #wordBytes(HM), #padToWidth(8, #asByteStack(HN))
, HF , #wordBytes(WF) , UB , EB , #wordBytes(BR)
, #wordBytes(RR) , #wordBytes(HA) , SN
]
)
)
)
```

- `#hashTxData` returns the Keccak-256 message hash `HT` to be signed.
Expand Down
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