Cardano plutus policyid deserialisation error

Posted on September 8, 2022 by lk

Tags: cardano

tags: #cardano #plutus #DeserialisationError

There is a case, when calling Contract.submitTxConstraints in off chain code

    ledgerTx <- Contract.submitTxConstraints axuTypeValidator tx

it throw this error

Slot 00001: *** CONTRACT STOPPED WITH ERROR: "\"WalletContractError (ToCardanoError (Tag \\\"toCardanoPolicyId\\\" (Tag \\\"2 bytes\\\" DeserialisationError)))\""

the problem is the code from tutorial use ff for CurrencySymbol

gameTokenCurrency :: CurrencySymbol
gameTokenCurrency = "ff"

To fix this, we need to use correct serialisation of policyid as CurrencySymbol for eg

gameTokenCurrency :: CurrencySymbol
gameTokenCurrency = "baa836fef09cb35e180fce4b55ded152907af1e2c840ed5218776aaa"

Then, wuho0o0o!!, it’s work perfectly, with Emulator,I can do lock a validator script as bellow (logs were substracted)

...
Slot 00001: W[1]: TxSubmit: 8f6ed8d628d028084ff4d01fa7afc21bbb3911b0ebd037b75870ff16b4052614
Slot 00001: *** CONTRACT LOG: "before calling awaitTxConfirmed"
Slot 00001: TxnValidate 8f6ed8d628d028084ff4d01fa7afc21bbb3911b0ebd037b75870ff16b4052614
Slot 00001: SlotAdd Slot 2
Slot 00002: W[2]: InsertionSuccess: New tip is Tip(Slot 2, BlockId fd32b5f7e47fae4f2b35b27908647c311ad59beba76f3c596b03072c5f07d81b, BlockNumber 1). UTxO state was added to the end.
Slot 00002: W[1]: InsertionSuccess: New tip is Tip(Slot 2, BlockId fd32b5f7e47fae4f2b35b27908647c311ad59beba76f3c596b03072c5f07d81b, BlockNumber 1). UTxO state was added to the end.
Slot 00002: *** CONTRACT LOG: "100 km target set"
...

Credit to this great answer of @Jey on cardano stackexchange.