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EIP 7702 Implement SetCode transactions (#2755)
* define SetCode transaction * parse SetCode tx from JSON fixture files * recover authority from message data * add docstrings * process delegated authority in #call rules * compute gas costs * update expected output in unit tests * refactor delegation processing in driver.md * load previous blob gas values for latest RLP encoded values * Tweak nonce validation in SetCode tx * pad sig values to 32 bytes during recoverAuthority * readability tweaks * refactor addAuthority rules
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‎kevm-pyk/src/kevm_pyk/kproj/evm-semantics/driver.md

Lines changed: 126 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -120,6 +120,7 @@ To do so, we'll extend sort `JSON` with some EVM specific syntax, and provide a
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=> #accessAccounts ACCTFROM #newAddr(ACCTFROM, NONCE) #precompiledAccountsSet(SCHED)
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~> #deductBlobGas
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~> #loadAccessList(TA)
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~> #loadAuthorities(AUTH)
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~> #checkCreate ACCTFROM VALUE
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~> #create ACCTFROM #newAddr(ACCTFROM, NONCE) VALUE CODE
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~> #finishTx ~> #finalizeTx(false, Ctxfloor(SCHED, CODE)) ~> startTx
@@ -133,12 +134,13 @@ To do so, we'll extend sort `JSON` with some EVM specific syntax, and provide a
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<txPending> ListItem(TXID:Int) ... </txPending>
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<coinbase> MINER </coinbase>
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<message>
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<msgID> TXID </msgID>
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<txGasLimit> GLIMIT </txGasLimit>
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<to> .Account </to>
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<value> VALUE </value>
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<data> CODE </data>
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<txAccess> TA </txAccess>
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<msgID> TXID </msgID>
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<txGasLimit> GLIMIT </txGasLimit>
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<to> .Account </to>
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<value> VALUE </value>
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<data> CODE </data>
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<txAccess> TA </txAccess>
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<txAuthList> AUTH </txAuthList>
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...
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</message>
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<account>
@@ -157,6 +159,7 @@ To do so, we'll extend sort `JSON` with some EVM specific syntax, and provide a
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=> #accessAccounts ACCTFROM ACCTTO #precompiledAccountsSet(SCHED)
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~> #deductBlobGas
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~> #loadAccessList(TA)
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~> #loadAuthorities(AUTH)
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~> #checkCall ACCTFROM VALUE
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~> #call ACCTFROM ACCTTO ACCTTO VALUE VALUE DATA false
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~> #finishTx ~> #finalizeTx(false, Ctxfloor(SCHED, DATA)) ~> startTx
@@ -177,6 +180,7 @@ To do so, we'll extend sort `JSON` with some EVM specific syntax, and provide a
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<data> DATA </data>
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<txAccess> TA </txAccess>
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<txVersionedHashes> TVH </txVersionedHashes>
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<txAuthList> AUTH </txAuthList>
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...
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</message>
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<versionedHashes> _ => TVH </versionedHashes>
@@ -193,7 +197,7 @@ To do so, we'll extend sort `JSON` with some EVM specific syntax, and provide a
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andBool GLIMIT >=Int maxInt(G0(SCHED, DATA, false), Ctxfloor(SCHED, DATA))
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rule <k> loadTx(_) => startTx ... </k>
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<statusCode> _ => EVMC_OUT_OF_GAS </statusCode>
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<statusCode> _ => EVMC_INVALID_BLOCK </statusCode>
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<txPending> ListItem(_TXID:Int) REST => REST </txPending> [owise]
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syntax EthereumCommand ::= "#finishTx"
@@ -254,6 +258,106 @@ To do so, we'll extend sort `JSON` with some EVM specific syntax, and provide a
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<callGas> GLIMIT => GLIMIT -Int Gaccesslistaddress < SCHED > </callGas>
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```
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Processing SetCode Transaction Authority Entries
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================================================
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- The `#loadAuthorities` function processes authorization entries in EIP-7702 SetCode transactions, charging 25000 gas per tuple regardless of validity.
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- Skips processing if transaction is not SetCode type; processes each authorization tuple by recovering the signer and attempting delegation.
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- The `#addAuthority` function implements EIP-7702 verification and delegation:
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- Validates that the chain ID matches current chain (or is 0) and nonce is within bounds
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- Checks if authority account code is empty or already delegated
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- Verifies that the authority nonce equals authorization nonce
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- Sets delegation code (0xEF0100 + address) and increments nonce on success
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- Provides refund (25000 - 12500 = 12500 gas) only for accounts that existed before processing
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- A new account will be created for Authorities that are not in the `<accounts>` state, without increasing the refund amount
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```k
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syntax InternalOp ::= #loadAuthorities ( List ) [symbol(#loadAuthorities)]
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// --------------------------------------------------------------------------
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rule <k> #loadAuthorities(_) => .K ... </k>
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<txPending> ListItem(TXID:Int) ... </txPending>
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<message>
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<msgID> TXID </msgID>
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<txType> TXTYPE </txType>
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...
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</message>
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requires notBool TXTYPE ==K SetCode
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rule <k> #loadAuthorities( .List ) => .K ... </k>
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<txPending> ListItem(TXID:Int) ... </txPending>
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<message>
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<msgID> TXID </msgID>
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<txType> SetCode </txType>
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...
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</message>
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rule <k> #loadAuthorities (ListItem(ListItem(CID) ListItem(ADDR) ListItem(NONCE) ListItem(YPAR) ListItem(SIGR) ListItem(SIGS)) REST )
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=> #setDelegation (#recoverAuthority (CID, ADDR, NONCE, YPAR, SIGR, SIGS ), CID, NONCE, ADDR)
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~> #loadAuthorities (REST)
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... </k>
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<txPending> ListItem(TXID:Int) ... </txPending>
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<message>
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<msgID> TXID </msgID>
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<txType> SetCode </txType>
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...
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</message>
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<callGas> GLIMIT => GLIMIT -Int 25000 </callGas> [owise]
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syntax InternalOp ::= #setDelegation ( Account , Bytes , Bytes , Bytes ) [symbol(#setDelegation)]
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// -------------------------------------------------------------------------------------------------
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rule <k> #setDelegation(AUTHORITY, CID, NONCE, _ADDR) => .K ... </k> <chainID> ENV_CID </chainID>
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requires AUTHORITY ==K .Account
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orBool (notBool #asWord(CID) in (SetItem(ENV_CID) SetItem(0)))
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orBool (#asWord(NONCE) >=Int maxUInt64)
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rule <k> #setDelegation(AUTHORITY, CID, NONCE, ADDR)
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=> #touchAccounts AUTHORITY ~> #accessAccounts AUTHORITY
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~> #addAuthority(AUTHORITY, CID, NONCE, ADDR)
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...
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</k> [owise]
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syntax InternalOp ::= #addAuthority ( Account , Bytes , Bytes , Bytes ) [symbol(#addAuthority)]
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// -----------------------------------------------------------------------------------------------
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rule <k> #addAuthority(AUTHORITY, _CID, NONCE, _ADDR) => .K ... </k>
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<account>
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<acctID> AUTHORITY </acctID>
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<code> ACCTCODE </code>
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<nonce> ACCTNONCE </nonce>
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...
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</account>
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requires notBool (ACCTCODE ==K .Bytes orBool #isValidDelegation(ACCTCODE))
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orBool (notBool #asWord(NONCE) ==K ACCTNONCE)
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rule <k> #addAuthority(AUTHORITY, _CID, NONCE, ADDR) => .K ... </k>
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<schedule> SCHED </schedule>
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<refund> REFUND => REFUND +Int Gnewaccount < SCHED > -Int Gauthbase < SCHED > </refund>
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<account>
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<acctID> AUTHORITY </acctID>
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<code> ACCTCODE => #if #asWord(ADDR) ==Int 0 #then .Bytes #else EOA_DELEGATION_MARKER +Bytes ADDR #fi </code>
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<nonce> ACCTNONCE => ACCTNONCE +Int 1 </nonce>
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...
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</account>
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requires (ACCTCODE ==K .Bytes orBool #isValidDelegation(ACCTCODE))
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andBool #asWord(NONCE) ==K ACCTNONCE
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rule <k> #addAuthority(AUTHORITY, _CID, NONCE, ADDR) => .K ... </k>
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<accounts>
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( .Bag
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=>
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<account>
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<acctID> AUTHORITY </acctID>
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<code> #if #asWord(ADDR) ==Int 0 #then .Bytes #else EOA_DELEGATION_MARKER +Bytes ADDR #fi </code>
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<nonce> 1 </nonce>
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...
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</account>
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)
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...
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</accounts>
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requires #asWord(NONCE) ==Int 0 andBool notBool #accountExists(AUTHORITY)
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rule <k> #addAuthority(AUTHORITY, _CID, NONCE, _ADDR) => .K ... </k> requires notBool (#accountExists(AUTHORITY) orBool #asWord(NONCE) ==Int 0)
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```
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- `exception` only clears from the `<k>` cell if there is an exception preceding it.
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- `failure_` holds the name of a test that failed if a test does fail.
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- `success` sets the `<exit-code>` to `0` and the `<mode>` to `SUCCESS`.
@@ -633,6 +737,21 @@ Here we check the other post-conditions associated with an EVM test.
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rule <k> check "transactions" : ("maxFeePerBlobGas" : VALUE) => .K ... </k> <txOrder> ListItem(TXID) ... </txOrder> <message> <msgID> TXID </msgID> <txMaxBlobFee> VALUE </txMaxBlobFee> ... </message>
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rule <k> check "transactions" : ("sender" : VALUE) => .K ... </k> <txOrder> ListItem(TXID) ... </txOrder> <message> <msgID> TXID </msgID> <sigV> TW </sigV> <sigR> TR </sigR> <sigS> TS </sigS> ... </message> <chainID> B </chainID> requires #sender( #getTxData(TXID), TW, TR, TS, B ) ==K VALUE
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rule <k> check "transactions" : "authorizationList" : [ .JSONs ] => .K ... </k>
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rule <k> check "transactions" : "authorizationList" : [ { "chainId": CID, "address": ADDR, "nonce": NONCE, "v": _, "r": SIGR, "s": SIGS, "signer": _, "yParity": SIGY } , REST ]
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=> check "transactions" : "authorizationList" : [ #hex2Bytes(CID), #hex2Bytes(ADDR), #hex2Bytes(NONCE), #hex2Bytes(SIGY), #hex2Bytes(SIGR), #hex2Bytes(SIGS) ]
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~> check "transactions" : "authorizationList" : [ REST ]
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...
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</k>
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rule <k> check "transactions" : "authorizationList" : [ AUTH ] => .K ... </k>
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<txOrder> ListItem(TXID) ... </txOrder>
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<message> <msgID> TXID </msgID> <txAuthList> AUTHLIST </txAuthList> ... </message> requires #parseJSONs2List(AUTH) in AUTHLIST
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syntax Bytes ::= #hex2Bytes ( String ) [function] //TODO: Is this needed?
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// -------------------------------------------------
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rule #hex2Bytes("0x00") => b""
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rule #hex2Bytes(S) => #parseByteStack(S) [owise]
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syntax Bool ::= isInAccessListStorage ( Int , JSON ) [symbol(isInAccessListStorage), function]
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| isInAccessList ( Account , Int , JSON ) [symbol(isInAccessList), function]
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// -------------------------------------------------------------------------------------------------

‎kevm-pyk/src/kevm_pyk/kproj/evm-semantics/evm-types.md

Lines changed: 7 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -443,30 +443,33 @@ Productions related to transactions
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| "AccessList"
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| "DynamicFee"
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| "Blob"
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// ------------------------
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| "SetCode"
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// ---------------------------
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syntax Int ::= #dasmTxPrefix ( TxType ) [symbol(#dasmTxPrefix), function]
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// -------------------------------------------------------------------------
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rule #dasmTxPrefix (Legacy) => 0
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rule #dasmTxPrefix (AccessList) => 1
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rule #dasmTxPrefix (DynamicFee) => 2
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rule #dasmTxPrefix (Blob) => 3
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rule #dasmTxPrefix (SetCode) => 4
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syntax TxType ::= #asmTxPrefix ( Int ) [symbol(#asmTxPrefix), function]
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// -----------------------------------------------------------------------
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rule #asmTxPrefix (0) => Legacy
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rule #asmTxPrefix (1) => AccessList
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rule #asmTxPrefix (2) => DynamicFee
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rule #asmTxPrefix (3) => Blob
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rule #asmTxPrefix (4) => SetCode
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syntax TxData ::= LegacyTx | AccessListTx | DynamicFeeTx | BlobTx
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// -----------------------------------------------------------------
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syntax TxData ::= LegacyTx | AccessListTx | DynamicFeeTx | BlobTx | SetCodeTx
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// -----------------------------------------------------------------------------
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syntax LegacyTx ::= LegacyTxData ( nonce: Int, gasPrice: Int, gasLimit: Int, to: Account, value: Int, data: Bytes ) [symbol(LegacyTxData)]
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| LegacySignedTxData ( nonce: Int, gasPrice: Int, gasLimit: Int, to: Account, value: Int, data: Bytes, networkChainId: Int ) [symbol(LegacySignedTxData)]
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syntax AccessListTx ::= AccessListTxData ( nonce: Int, gasPrice: Int, gasLimit: Int, to: Account, value: Int, data: Bytes, chainId: Int, accessLists: JSONs ) [symbol(AccessListTxData)]
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syntax DynamicFeeTx ::= DynamicFeeTxData ( nonce: Int, priorityGasFee: Int, maxGasFee: Int, gasLimit: Int, to: Account, value: Int, data: Bytes, chainId: Int, accessLists: JSONs) [symbol(DynamicFeeTxData)]
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syntax BlobTx ::= BlobTxData ( nonce: Int, priorityGasFee: Int, maxGasFee: Int, gasLimit: Int, to: Account, value: Int, data: Bytes, chainId: Int, accessLists: JSONs, maxBlobGasFee: Int, blobVersionedHashes: List ) [symbol(BlobTxData)]
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syntax SetCodeTx ::= SetCodeTxData ( nonce: Int, priorityGasFee: Int, maxGasFee: Int, gasLimit: Int, to: Account, value: Int, data: Bytes, chainId: Int, accessLists: JSONs, authorizationList: List) [symbol(SetCodeTxData)]
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// ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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endmodule

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