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OEP-72.md

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  OEP: 72
  Title: DDXF DToken+Agent Standard
  Author: lucas7788<sishsh@163.com>
  Type: Standard
  Status: Accepted
  Created: 2018-07-03

Abstract

Sub-contract of DDXF series, a standard proposal to combine off-chain access-token (tokenization) with on-chain token (assertization). Provides support for data management, esp., the permission control. This contract is a basic version for DToken, which cannot be retransferred. For the rest DToken contracts, which support OEP4, OEP5, and OEP8. Support the Agent to use tokens.

Motivation

As an important component of DDXF, the authority management of data is managed in the form of on-chain tokens, including data authorization management and data operation authentication, supporting the management of data operation processes in the data life cycle, and using on-chain traceability And the ability to confirm rights enables data rights management to support cross-system interoperability. According to different token characteristics, it can be further extended. This OEP is the basic data token + Agent. On top of the basic data token, the Agent is supported to use the token.

Specification

Methods

For methods related to the DToken standard, please refer to DToken and it's extensions.

useTokenByAgent

fn use_token_by_agent(account: &Address, agent: &Address, token_id: &[u8], n: U128) -> bool{}

Use token by agent, the agent of the token has the right to invoke this method.

Parameter Type Desc
account &Address buyer address
agent &Address agent address
token_id &[u8] the number of purchases
n U128 the number of consuming token

Event

["useTokenByAgent", account,agent, token_id, n]

addTokenAgents

fn add_token_agents(
    account: &Address,
    token_id: &[u8],
    agents: &[Address],
    n: Vec<U128>,
) -> bool{}

This method only append agents for the specified token.

Parameter Type Desc
account &Address buyer address
token_id &[u8] token id
agents &[Address] the array of agent address
n Vec number of authorizations per agent

Event

[ ["addTokenAgents", account, token_id, agent, n] ]

addAgents

fn add_agents(
    account: &Address,
    agents: Vec<Address>,
    n: Vec<U128>,
    token_ids: Vec<Vec<u8>>,
) -> bool{}

This method only append agents for the specified multiple token.

Parameter Type Desc
account &Address buyer address
agents &[Address] the array of agent address
n Vec number of authorizations per agent
token_id Vec<Vec> token ids

Event

[ ["addTokenAgents", account, token_id, agent, n] ]

removeTokenAgents

fn remove_token_agents(account: &Address, token_id: &[u8], agents: &[Address]) -> bool{}

This method only remove agents for the specified token.

Parameter Type Desc
account &Address buyer address
token_id &[u8] token id
agents &[Address] the array of agent address

Event

[ ["removeTokenAgents", account, token_id] ]

Implementation

Please refer to OEP-73, DToken+Agent+Oep8 contract.