Plutus-Apps-Extra

This library extends plutus-apps functionality by adding many new utility functions and types. It also includes our custom transaction builder for more abstraction and less boilerplate code.

ENCOINS transaction builder

Module Constraints.OffChain contains the functions available in this DSL. These functions wrap the respective functions from plutus-apps, resulting in cleaner and more concise code.

To construct a complex transaction, you could use those with a do notation. For example, the following function mints the specified tokens, consumes the given TxOutRef, and sends the tokens to a particular script address:

myToken :: Value

myValidatorHash :: ValidatorHash

myMintingPolicy :: MintingPolicy

myTokensMintTx :: TxOutRef -> Integer -> TransactionBuilder ()
myTokensMintTx ref amt = do
    let v = scale amt myToken
    _ <- utxoSpentPublicKeyTx (\r _ -> ref == r)
    utxoProducedScriptTx myValidatorHash Nothing v ()
    tokensMintedTx myMintingPolicy () v

You can then get the lookups and transaction constraints using buildTxConstraints function from the Types.Tx module.