Plutus Playground Smart Contract

Playground.hs

import qualified Data.Text           as T
import           Playground.Contract
import           Plutus.Contract     hiding (when)
import           PlutusTx.Prelude

-- | A 'Contract' that logs a message.
hello :: Contract () BlockchainActions T.Text ()
hello = logInfo @String "Hello, world"

endpoints :: Contract () BlockchainActions T.Text ()
endpoints = hello

mkSchemaDefinitions ''BlockchainActions

$(mkKnownCurrencies [])

Simulation.json

[0,[{"simulationWallets":[{"simulatorWalletWallet":{"getWallet":1},"simulatorWalletBalance":{"getValue":[[{"unCurrencySymbol":""},[[{"unTokenName":""},100]]]]}},{"simulatorWalletWallet":{"getWallet":2},"simulatorWalletBalance":{"getValue":[[{"unCurrencySymbol":""},[[{"unTokenName":""},100]]]]}}],"simulationName":"Hello, world","simulationId":1,"simulationActions":[{"blocks":1,"tag":"AddBlocks"}]}]]