getTextDecodingError = 'TokenName is not hex-encoded: base16

[volodyad]

Got error on token minting and sending to own wallet

 let tokenName = fromString stringTokenName

<> Constraints.mustPayToPubKey ownPK forgedValue
<> Constraints.mustMintValue forgedValue

[pab:Warning:15473] [2021-11-22 22:09:08.04 UTC] WalletClientError "FailureResponse (Request {requestPath = (BaseUrl {baseUrlScheme = Http, baseUrlHost = \"localhost\", baseUrlPort = 8090, baseUrlPath = \"\"},\"/v2/wallets/b530fd5bb69e88f92e066ba40b4fae5b843dc7cb/transactions-balance\"), requestQueryString = fromList [], requestBody = Just ((),application/json;charset=utf-8), requestAccept = fromList [application/json;charset=utf-8,application/json], requestHeaders = fromList []), requestHttpVersion = HTTP/1.1, requestMethod = \"POST\"} (Response {responseStatusCode = Status {statusCode = 400, statusMessage = \"Bad Request\"}, responseHeaders = fromList [(\"Transfer-Encoding\",\"chunked\"),(\"Date\",\"Mon, 22 Nov 2021 22:09:07 GMT\"),(\"Server\",\"Warp/3.3.17\"),(\"Content-Type\",\"application/json;charset=utf-8\")], responseHttpVersion = HTTP/1.1, responseBody = \"{\\\"message\\\":\\\"Error in $.inputs[0].assets[0]['asset_name']: TextDecodingError {getTextDecodingError = 'TokenName is not hex-encoded: base16: input: invalid encoding at offset: 0'}\\\",\\\"code\\\":\\\"bad_request\\\"}\"})"

[ak3n]

Could you please show more code? What is stringTokenName? forgedValue?

[volodyad]

let stringTokenName :: String = "metadata"

I have managed to convert to Cardano wallet token name via

import qualified Cardano.Wallet.Primitive.Types.TokenPolicy as TK
import qualified Data.ByteString.Char8            as B
import qualified Data.ByteString.Base16         as B16
import qualified Data.Text                      as T
import qualified Data.Text.Encoding             as T

    let cpTokenName :: String = "metadata"
    let tokenNameE :: Either TextDecodingError TK.TokenName = fromText . T.decodeUtf8 . B16.encode . B.pack $  cpTokenName
    case tokenNameE of
      Right t -> do
        putStrLn $ "Token name: " ++ show t
      Left e -> do
        putStrLn $ "No Token name: " ++ show e

Ideally would be good if Plutus.V1.Ledger.Value fromString will handle this

instance IsString TokenName where
    fromString = fromText . Text.pack

[volodyad]

Now I am encode token, but for some reason on balancing it encrypts it once more

I have create unique market on start and eccode to base16
"marketVal: Value (Map [(b45e5c5e6f791fa8afbaa7a5352dac88d0760173a26fda416f077928,Map [(\"4e46544d61726b6574706c616365\",1)])])"
4e46544d61726b6574706c616365 = NFTMarketplace in base16

Now on token create method I find this utxo consume it and sand back,

create market CreateParams{..} = do
...
let marketInst = marketInstance market
     mrScript = marketScript market
     marketFactoryData   = Factory $ nftMetadata : nftMetas
     nftMetadataData   = NFTMeta nftMetadata
     marketVal    = assetClassValue (marketId market) 1

     lookups  = Constraints.typedValidatorLookups marketInst 
                <> Constraints.otherScript mrScript
                <> Constraints.unspentOutputs (Map.singleton oref o)
                <> Constraints.mintingPolicy nftTokenPolicy
                <> Constraints.mintingPolicy nftTokenMetaPolicy

     tx       = Constraints.mustPayToTheScript marketFactoryData marketVal
                <> Constraints.mustPayToTheScript nftMetadataData nftTokenMetaForgedValue
                <> Constraints.mustSpendScriptOutput oref (Redeemer $ PlutusTx.toBuiltinData $ Create nftMetadata)
                <> Constraints.mustPayToPubKey ownPK nftTokenForgedValue
                <> Constraints.mustMintValue nftTokenForgedValue
                <> Constraints.mustMintValue nftTokenMetaForgedValue
 logInfo @String $ "marketVal-current : " ++ show marketVal  

seems it encode token name once more
token: 34653436353434643631373236623635373437303663363136333635

although in marketVal-current log - 4e46544d61726b6574706c616365

[pab:Info:51875] [2021-11-26 20:34:06.76 UTC] 8d9940d4-2857-4d6d-b8fe-efa2248f64ac: "marketVal-current: Value (Map [(b45e5c5e6f791fa8afbaa7a5352dac88d0760173a26fda416f077928,Map [(\"4e46544d61726b6574706c616365\",1)])])"

[pab:Warning:51875] [2021-11-26 20:34:06.81 UTC] WalletClientError "FailureResponse (Request {requestPath = (BaseUrl {baseUrlScheme = Http, baseUrlHost = \"localhost\", baseUrlPort = 8090, baseUrlPath = \"\"},\"/v2/wallets/88cc0e42b4a4f29d192c8b05967c386cb4c2aeaa/transactions-balance\"), requestQueryString = fromList [], requestBody = Just ((),application/json;charset=utf-8),
 requestAccept = fromList [application/json;charset=utf-8,application/json], requestHeaders = fromList []), requestHttpVersion = HTTP/1.1, requestMethod = \"POST\"} 
(Response {responseStatusCode = Status {statusCode = 403, statusMessage = \"Forbidden\"}, 
responseHeaders = fromList [(\"Transfer-Encoding\",\"chunked\"),(\"Date\",\"Fri, 26 Nov 2021 20:34:06 GMT\"),(\"Server\",\"Warp/3.3.17\"),(\"Content-Type\",\"application/json;charset=utf-8\")], 
responseHttpVersion = HTTP/1.1, 
responseBody = \"{\\\"message\\\":\\\"I can't process this payment as there are not enough funds available in the wallet. I am missing: coin: 0.000000 tokens:   - policy: b45e5c5e6f791fa8afbaa7a5352dac88d0760173a26fda416f077928     token: 34653436353434643631373236623635373437303663363136333635     quantity: 1 \\\",\\\"code\\\":\\\"not_enough_money\\\"}\"})"

you could check sources: on
https://github.com/input-output-hk/plutus-use-cases/blob/eleks/dev/eleks/nft/src/Contracts/NFT/OffChain.hs

[ak3n]

Yep, that's correct. Plutus's TokenName is encoded automatically.

It's unclear how TokenName is not hex-encoded error was raised. The encoding should be done automatically, at least by Plutus.Contract.Wallet.extract.

[volodyad]

Might be that I was running Cardano node from master (1.31.0), plutus apps points to 1.30 (b6ca519f97a0e795611a63174687e6bb70c9f752)

on master cardano-node --mint="1 $POLICY_ID.TOKEN_NAME" requires TOKEN_NAME to be base16, on 1.30 it can be string

[volodyad]

No, same issue on 1.30 , on another contract
[pab:Warning:503] [2021-12-06 12:38:54.83 UTC] WalletClientError "FailureResponse (Request {requestPath = (BaseUrl {baseUrlScheme = Http, baseUrlHost = "localhost", baseUrlPort = 46493, baseUrlPath = ""},"/v2/wallets/2d4cc31a4b3116ab86bfe529d30d9c362acd0b44/transactions-balance"), requestQueryString = fromList [], requestBody = Just ((),application/json;charset=utf-8), requestAccept = fromList [application/json;charset=utf-8,application/json], requestHeaders = fromList []), requestHttpVersion = HTTP/1.1, requestMethod = "POST"} (Response {responseStatusCode = Status {statusCode = 400, statusMessage = "Bad Request"}, responseHeaders = fromList [("Transfer-Encoding","chunked"),("Date","Mon, 06 Dec 2021 12:38:54 GMT"),("Server","Warp/3.3.17"),("Content-Type","application/json;charset=utf-8")], responseHttpVersion = HTTP/1.1, responseBody = "{\"message\":\"Error in $.inputs[0].assets[0]['asset_name']: TextDecodingError {getTextDecodingError = 'TokenName is not hex-encoded: base16: input: invalid encoding at offset: 0'}\",\"code\":\"bad_request\"}"})"

[ak3n]

Closing this because of IntersectMBO/plutus-apps#192 and turned out the problem is on plutus-apps side.