Implement IOU Smart Contract

1 IssueIOU Transaction

• Go to Apps Tab > Create to create a new Application “IOU”

• Create a flow

  • flow name “IssueIOU” >
  • Add a trigger, select “SmartContract Action Trigger” from the list
    • Select “IOU” from the dropdown menu
    • Click “Next” and “Next” to get to “Define Transaction Input” section, security and time window are not supported for Corda smart contract
    • Add input fields
      • linearId, select “LinearId” from type dropdown menu
      • issuer, select “Party” from type dropdown menu
      • holder, select “Party” from type dropdown menu
      • amt, select “Amount” from type dropdown menu
      • click “Next”
    • Add output fields, leave this blank, click “Continue”
    • Select “Copy Schema”
  • Select the trigger
    • Map to flow inputs
  • Now we will implement the flow
    • Add “Ledger Operation” activity from Dovetail-Ledger category
    • Map input

2 TransferIOU Transaction

• Create a new flow to implement TransferIOU transaction
  • Add a trigger, select “SmartContract Action Trigger” from the list
    • Select “IOU” from the dropdown menu
    • Click “Next” and “Next” to get to “Define Transaction Input” section, security and time window are not supported for Corda smart contract
    • Add input fields
      • iou, select “AssetRef” from Type dropdown menu, enter “com.example.iou.IOU” in the RecordType field, select “True” from Consuming dropdown menu
      • newHolder, select “Party” from type dropdown menu
      • click “Next”
    • Add output fields, leave this blank, click “Continue”
    • Select “Copy Schema”
  • Select the trigger
    • Map to flow inputs
  • Now we will implement the flow
    • Add “Ledger Operation” activity from Dovetail-Ledger category
    • Map input

3 SettleIOU Transaction

• Create a new flow to implement SettleIOU transaction
  • Add a trigger, select “SmartContract Action Trigger” from the list * Select “IOU” from the dropdown menu * Click “Next” and “Next” to get to “Define Transaction Input” section, security and time window are not supported for Corda smart contract * Add input fields * iou, select “AssetRef” from Type dropdown menu, enter “com.example.iou.IOU” in the RecordType field, select “True” from Consuming dropdown menu * funds, select “AssetRef” from Type dropdown menu, select “True” from Consuming dropdown menu, select “True” from Repeating dropdown menu * click “Next” * Add output fields, leave this blank, click “Continue” * Select “Copy Schema”
    • Select the trigger
      • Map to flow inputs
    • Now we will implement the flow
      • Add “Payment Processor” activity from Dovetail-Ledger category
      • Map input