Plutus Playground Smart Contract

Playground.hs

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

-- | 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 [])
-- | End

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"}]}]]