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nolash
a13f4cac2c Add 014 2020-08-10 09:25:11 +02:00
5 changed files with 293 additions and 121 deletions

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# API EXTENSIONS FOR EXTERNALLY CREATED BLOCKCHAIN RESOURCES
At time of writing, apis are registered under `/api/v2`. This will change.
## NOMENCLATURE
Values enclosed with `<>` are _required_.
Values enclosed with `[]` means _optional_.
No enclosure means _literal_.
## CHANGED METHODS
Endpoints _modified_ are found under /api/v1/
Changes will be submitted upstream.
### `/api/v1/organisation`
### **POST**
One item is added to data payload:
```
{
account_address: [address],
}
```
If specified, the organisation will be bound to the specified blockchain account, and _will not_ create a new account on instantiation.
## ADDED METHODS
Endpoints _added_ are found under /api/ext/
### `/api/ext/exchange/register`
#### **POST**
Creates a new entry in `exchange_contract` table in database.
Requires token addresses to be registered in advance on `/api/v1/token/`
Request payload:
```
{
reserve_address: <address>,
token_address: <address>,
converter_address: <address>,
registry_address: <address>,
connector_weight: <uint>,
}
```
Response payload on success:
```
{
message: 'Exchange added',
data: {
exchange: (exchange schema dump, TODO specify)
}
}
```
Returns:
```
201 - exchange record created
400 - token addresses not known to platform
```

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# API EXTENSIONS FOR MANIPULATING LOCATIONS RECORDS
## NOMENCLATURE
Values enclosed with `<>` are _required_.
Values enclosed with `[]` means _optional_.
No enclosure means _literal_.
## ADDED METHODS
Endpoints _added_ are found under /api/ext/
### `/api/ext/geolocation/`
#### **POST**
Adds a location entry to the database
Request payload:
```
{
common_name: <string>,
latitude: <float>,
longitude: <float>,
parent_id: [uint],
}
```
`parent_id` is the location table id of the location record for the greater area encapsulating the location being registered.
### `/api/ext/geolocation/<path_string>/`
#### **GET**
Retrieves a location record based on the given `path_string`. Every part of the given path string must match the value in the location hierarchy. A path string must have minimum one part.
Example, given database has `foo/bar` and `foo/baz`: A search of `foo/bar` will only match `foo/bar`. A search of `foo` will match both `foo/bar` and `foo/baz`.
Response payload:
```
{
id: <uint>,
common_name: <string>,
path: <string>,
latitude: <float>,
longitude: <float>,
}
```
`common_name` is the location leaf name.
`path` is the full hierarchical path string.
### `/api/ext/geolocation/<ext_type>/<ext_id>/`
#### **GET**
Queries the `location_external` table for a matching value, and returns the `location` object associated with it.
Currently only `OSM` is supported as `ext_type`. The value given matches a `place_id` entry in the external table.
Data format returned the same as `GET /api/ext/geolocation/<path_string>/`
### `/api/ext/user/<user_id>/geolocation/`
#### **PUT**
Sets the location of the affected user
Data payload:
```
{
location_id: <uint>
}
```
#### **GET**
Retrieves full objects for the hierarchical path of the user location.
Response payload:
```
{
user_id: user_id,
location: [
{
common_name: <string>,
longitude: <float>,
latitude: <float>,
},
...
],
}
```

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# API EXTENSIONS FOR VIEWING NOTIFICATION DATABASE
## NOMENCLATURE
Values enclosed with `<>` are _required_.
Values enclosed with `[]` means _optional_.
No enclosure means _literal_.
## ADDED METHODS
Endpoints _added_ are found under /api/ext/
### `/api/ext/sms/` `/api/ext/sms/user/<user_id>/` `/api/ext/sms/<phone_number>/`
#### **GET**
Returns a list of latest sms notifications sent by the platform.
If `user_id` or `phone_number` is given, only entries for the affected user will be returned.
Accepts one query string:
```
limit: [uint] - maximum items to return (default: 100)
```
Response payload:
```
[
{
datetime: <string>,
number: <string>,
message: <string>,
},
...
]
```

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# API EXTENSIONS FOR INDEPENDENT TRANSFER ACCOUNTS
At time of writing, apis are registered under `/api/v2`. This will change.
## NOMENCLATURE
Values enclosed with `<>` are _required_.
Values enclosed with `[]` means _optional_.
No enclosure means _literal_.
## ADDED METHODS
Endpoints _added_ are found under /api/ext/
### `/api/ext/transfer_account/register/`
#### **POST**
Create a new transfer_account bound to an organisation.
Request payload:
```
{
address: <address>,
organisation_id: <uint>,
}
```
Response payload on success:
```
{
message: 'Created',
data: {
id: <uint>
},
}
```
`id` is the id of the newly created transfer account
Returns:
```
201 - transfer account is added
400 - address or organisation data invalid
404 - organisation not found
```
### `/api/ext/user/`
#### **POST**
Add a new user without transfer account. The user will be associated with the organisation in the API session context.
Request payload:
```
{
phone: <string>,
first_name: <string>,
last_name: <string>,
}
```
Response payload on success:
```
{
data: {
id: <uint>
},
}
```
`id` is the id of the newly created user.
Returns:
```
201 - user created
400 - organisation context missing
```

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# CIC TOKEN PLATFORM REGISTRATION
This document describes the components and steps involved to announce a token registration to the network.
## RATIONALE
Although registering a new token on the Bancor contracts will emit events upon which CIC client code can act upon, the information available is limited to the token itself and the exchange only. Therefore, a way to specify additional metadata for the entity that should be associated with the token must be provided.
## OVERVIEW
The system consists of two smart contracts and a metadata schema. The schema describes the actual metadata, and the contracts provide the announcement of the token metadata availability, and a mechanism to locate where the metadata can be retrieved from.
A separate, more formal document will be written as a request for comment for decentralized metadata dissemination for institutionally identifiable information.
### CONTRACTS
The `DecentralizedStorageResolver` contract facilitates multiplexing of data resource locations across web2 and web3 networks. It is a separately maintained project with its own documentation. Its utility here is to let an entity specify one or more locations where the metadata for the registration can be retrieved.
The `CICRegistration` contract announces the availability of metadata for a given token. In essence it is a simple chain of mappings (names do not match contract properties):
```
{
'token_address': {
'token_announcer_address': {
'resolver_address': <address>,
'resolver_type': <bytes32>,
'resolver_chain': <bytes32>,
}
}
}
```
The `resolver_type` is a sha256 hash of a custom resolver id. The only three recognized values at current time are:
* `sha256(DecentralizedStorageResolver)`, the resolver mentioned above
* `sha256(ENS1)` - first generation ENS
* `sha256(ENS2)` - second generation ENS , which refers to the aforementioned contract.
`resolver_chain` is a custom chain identifier string, which identifies which and what type of decentralized consensus resource holds the resolver record. It has the following format:
```
<platform>:<version>:<network>:<chain>
```
Example values are:
* `ethereum:1:bloxberg:8995`
* `ethereum:1:main:1`
### SCHEMA
The schema defines how the metadata must be formatted. The data type is json, and has the following layout:
(TODO: write in official schema spec language instead if exists)
```
{
"schema_version": 1,
"network": "bancor",
"token": "<hex>",
"identities": {
"default": "<rfc-2426, must be unencrypted>",
"[recipient_hint]": "<rfc-2426, optionally encrypted>",
...
},
}
[] = optional value
<hex> = 0x-prefixed hexadecimal value
[recipient_hint] = (optional) arbitrary value that can be announced off-band to specific consumers, in order to instruct how to decrypt the values. Cannot be "default"
<entity> = arbitrary string specifying an organisation or person to associate with the token.
```
The actual organisation and person detail records are given in RFC-6350 vcard format. The **MINIMUM** amount of data the default entity can contain is:
```
BEGIN:VCARD
ORG: <organisation_name_to_register>
X-COUNTRY-CODE: <ISO 639-1 country_ode>
TZ:<tzdata>
END:VCARD
```
### SEMPO PLATFORM INTEGRATION
To register all necessary information for a new token with associated organisation and exchange, we require the following items of information:
- bancor registry address
- token address
- organisation name
- organisation country
- organisation timezone
- admin email
A new blockchain listener component is needed that monitors the `CICRegistration` contract for `TokenRegistration` events. The first iteration will have these limitations:
* Will only work with `DecentralizedStorageResolver`.
* Expect the record in the `DecentralizedStorageResolver` to already be available at time of announcement.
* Only use the default identity.
* Only read the minimum of entries required (see below). Any additional fields in the VCARD will be ignored for now.
* No encryption supported.
The minimum content of the VCARD for Sempo platform token metadata registration is:
```
BEGIN:VCARD
ORG: Acme Inc.
X-COUNTRY-CODE: ke
TZ:Africa/Nairobi
EMAIL: admin@acme.org
END:VCARD
```
### RESOURCES
* [CICRegistration contract](https://gitlab.com/grassrootseconomics/cic-contracts/-/blob/master/cic-registration/contracts/CICRegistration.sol)
* [DecentralizedStorageResolver contract](https://gitlab.com/nolash/resolvemux/-/blob/master/Resolver.sol)
* [RFC 6350](https://tools.ietf.org/html/rfc6350)