[FEATURE] Support DvP Contract

[purplesmoke05]

Is your feature request related to a problem? Please describe.

• https://github.com/BoostryJP/ibet-SmartContract/issues/428

Describe the solution you'd like

• Support DvP Contract

[purplesmoke05]

API Specifications

DVP Delivery Agent Management

• GET: /settlement/dvp/agent/accounts
  • This is an endpoint to list all delivery agent accounts.
• POST: /settlement/dvp/agent/accounts
  • This is an endpoint to create an agent accounts.
• GET: /settlement/dvp/agent/account/{account_address}
  • This is an endpoint to retrieve the agent accounts.
• DELETE: /settlement/dvp/agent/account/{account_address}
  • This is an endpoint to delete the agent accounts.
• POST: /settlement/dvp/agent/account/{account_address}/eoa_password
  • This is an endpoint to change the EOA password of the account.

DVP Delivery Operation

• GET: /settlement/dvp/{exchange_address}/deliveries
  • This is an endpoint to list all deliveries on the DVP contract.
• POST: /settlement/dvp/{exchange_address}/deliveries
  • This is an endpoint to create new delivery.
  • This would be called from Issuer.
• GET: /settlement/dvp/{exchange_address}/delivery/{delivery_id}
  • This is an endpoint to retrieve the delivery of given delivery id
• POST: /settlement/dvp/{exchange_address}/delivery/{delivery_id}
  • This is an endpoint to Cancel, Finish, Abort the delivery of given delivery id.
  • This would be called from issuer when the delivery is to be canceled, and from agent when the delivery is to be finished or aborted.