Simple escrow

metadata.json

{"valueParameterDescriptions":[["Price","Amount of Lovelace to be paid by the *Buyer* for the item."]],"slotParameterDescriptions":[["Buyer's deposit timeout","Deadline by which the *Buyer* must deposit the selling *Price* in the contract."],["Buyer's dispute timeout","Deadline by which, if the *Buyer* has not opened a dispute, the *Seller* will be paid."],["Seller's response timeout","Deadline by which, if the *Seller* has not responded to the dispute, the *Buyer* will be refunded."],["Timeout for arbitrage","Deadline by which, if the *Arbiter* has not resolved the dispute, the *Buyer* will be refunded."]],"roleDescriptions":[["Arbiter","The party that will choose who gets the money in the event of a disagreement between the *Buyer* and the *Seller* about the outcome."],["Buyer","The party that wants to buy the item. Payment is made to the *Seller* if they acknowledge receiving the item."],["Seller","The party that wants to sell the item. They receive the payment if the exchange is uneventful."]],"contractType":"ES","contractName":"Simple escrow","contractDescription":"Regulates a money exchange between a *Buyer* and a *Seller*. If there is a disagreement, an *Arbiter* will decide whether the money is refunded or paid to the *Seller*.","choiceDescriptions":[["Confirm problem","Acknowledge there was a problem and a refund must be granted."],["Dismiss claim","The *Arbiter* does not see any problem with the exchange and the *Seller* must be paid."],["Dispute problem","The *Seller* disagrees with the *Buyer* about the claim that something went wrong."],["Everything is alright","The transaction was uneventful, *Buyer* agrees to pay the *Seller*."],["Report problem","The *Buyer* claims not having received the product that was paid for as agreed and would like a refund."]]}

playground.marlowe

When [
  (Case
     (Deposit
        (Role "Seller")
        (Role "Buyer")
        (Token "" "")
        (ConstantParam "Price"))
     (When [
           (Case
              (Choice
                 (ChoiceId "Everything is alright"
                    (Role "Buyer")) [
                 (Bound 0 0)]) Close)
           ,
           (Case
              (Choice
                 (ChoiceId "Report problem"
                    (Role "Buyer")) [
                 (Bound 1 1)])
              (Pay
                 (Role "Seller")
                 (Account
                    (Role "Buyer"))
                 (Token "" "")
                 (ConstantParam "Price")
                 (When [
                       (Case
                          (Choice
                             (ChoiceId "Confirm problem"
                                (Role "Seller")) [
                             (Bound 1 1)]) Close)
                       ,
                       (Case
                          (Choice
                             (ChoiceId "Dispute problem"
                                (Role "Seller")) [
                             (Bound 0 0)])
                          (When [
                                (Case
                                   (Choice
                                      (ChoiceId "Dismiss claim"
                                         (Role "Arbiter")) [
                                      (Bound 0 0)])
                                   (Pay
                                      (Role "Buyer")
                                      (Party
                                         (Role "Seller"))
                                      (Token "" "")
                                      (ConstantParam "Price") Close))
                                ,
                                (Case
                                   (Choice
                                      (ChoiceId "Confirm problem"
                                         (Role "Arbiter")) [
                                      (Bound 1 1)]) Close)] (SlotParam "Timeout for arbitrage") Close))] (SlotParam "Seller's response timeout") Close)))] (SlotParam "Buyer's dispute timeout") Close))] (SlotParam "Buyer's deposit timeout") Close

playground.marlowe.json

{}