Client-app Identity APIs

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Architecture Decision Record (ADR) Process
Client-app Identity APIs
Overview
This page describes how identity domain transactions need to be implemented by client-side applications/libraries such as cheqd-sdk (forked from Evernym VDR Tools).
Details on how identity transactions are defined is available in ADR 002: Identity entities and transactions.
Base write flow
1.Build a request Example: build_create_did_request(id, verkey, alias)
2.Sign the request using DID key Example: indy_crypto_sign(did, verkey)
3.Build a transaction with the request from previous step Example: build_tx(pool_alias, pub_key, builded_request, account_number, account_sequence, max_gas, max_coin_amount, denom, timeout_height, memo)
4.Sign the transaction Example: cheqd_keys_sign(wallet_handle, key_alias, tx).
5.Broadcast a signed transaction Example: broadcast_tx_commit(pool_alias, signed).
Response format
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  Response {
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   check_tx: TxResult {
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      code: 0,
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      data: None,
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      log: "",
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      info: "",
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      gas_wanted: 0,
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      gas_used: 0,
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      events: [
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      ],
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      codespace: ""
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   },
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   deliver_tx: TxResult {
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      code: 0,
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      data: Some(Data([...])),
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      log: "[{\"events\":[{\"type\":\"message\",\"attributes\":[{\"key\":\"action\",\"value\":\"send\"},{\"key\":\"sender\",\"value\":\"cheqd1fknpjldck6n3v2wu86arpz8xjnfc60f99ylcjd\"},{\"key\":\"module\",\"value\":\"bank\"}]},{\"type\":\"transfer\",\"attributes\":[{\"key\":\"recipient\",\"value\":\"cheqds1pvnjjy3vz0ga6hexv32gdxydzxth7f86mekcpg\"},{\"key\":\"sender\",\"value\":\"cheqd1fknpjldck6n3v2wu86arpz8xjnfc60f99ylcjd\"},{\"key\":\"amount\",\"value\":\"1000ncheq\"}]}]}]",
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      info: "",
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      gas_wanted: 0,
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      gas_used: 0,
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      events: [...], 
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      codespace: ""
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   },
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   hash: "1B3B00849B4D50E8FCCF50193E35FD6CA5FD4686ED6AD8F847AC8C5E466CFD3E",
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   height: 353
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}
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hash : Transaction hash
height: Ledger height
DID transactions
Create DID
cheqd-sdk function
build_create_did_request(id, verkey, alias)
Request format
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CreateDidRequest 
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{
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    "data": {
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               "id": "GEzcdDLhCpGCYRHW82kjHd",
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               "verkey": "~HmUWn928bnFT6Ephf65YXv",
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               "alias": "DID for Alice"
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             },
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    "owner": "GEzcdDLhCpGCYRHW82kjHd",
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    "signature": "49W5WP5jr7x1fZhtpAhHFbuUDqUYZ3AKht88gUjrz8TEJZr5MZUPjskpfBFdboLPZXKjbGjutoVascfKiMD5W7Ba",
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    "metadata": {}
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}
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id (base58-encoded string): Target DID as base58-encoded string for 16 or 32 byte DID value
verkey (base58-encoded string, possibly starting with ""; optional): Target verification key. It can start with "", which means that it is an abbreviated verkey and should be 16 bytes long when decoded. Otherwise, it's a full verkey which should be 32 bytes long when decoded.
alias (string; optional)
Response format
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CreateDidResponse {
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    "key": "did:GEzcdDLhCpGCYRHW82kjHd" 
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}
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key(string): A unique key is used to store this DID in a state
Response validation
CreateDidRequest must be signed by the DID from id field. It means that this DID must be an owner of this DID transaction.
Update DID
cheqd-sdk function
build_update_did_request(id, verkey, alias)
Request format
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UpdateDidRequest 
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{
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    "data": {
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               "id": "GEzcdDLhCpGCYRHW82kjHd",
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               "verkey": "~HmUWn928bnFT6Ephf65YXv",
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               "alias": "DID for Alice"
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             },
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    "owner": "GEzcdDLhCpGCYRHW82kjHd",
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    "signature": "49W5WP5jr7x1fZhtpAhHFbuUDqUYZ3AKht88gUjrz8TEJZr5MZUPjskpfBFdboLPZXKjbGjutoVascfKiMD5W7Ba",
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    "metadata": {}
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}
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id (base58-encoded string): Target DID as base58-encoded string for 16 or 32 byte DID value.
verkey (base58-encoded string, possibly starting with ""; optional): Target verification key. It can start with "", which means that it is an abbreviated verkey and should be 16 bytes long when decoded. Otherwise, it's a full verkey which should be 32 bytes long when decoded.
alias (string; optional).
Response format
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UpdateDidResponse {
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    "key": "did:GEzcdDLhCpGCYRHW82kjHd" 
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}
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key(string): A unique key is used to store this DID in a state
Response validation
A transaction with id from UpdateDidRequestmust already be in a ledger created by CreateDidRequest
UpdateDidRequest must be signed by the DID from id field. It means that this DID must be an owner of this DID transaction.
Get DID
cheqd-sdk function
build_query_get_did(id)
id (base58-encoded string): Target DID as base58-encoded string for 16 or 32 byte DID value.
Request format
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Request 
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{
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    "path": "/store/cheqd/key",
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    "data": <bytes>,
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    "height": 642,
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    "prove": true
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}
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path: Path for RPC endpoint for cheqd pool
data: Query with an entity key from a state. String did:<id> encoded to bytes
height: Ledger height (size). None for auto calculation
prove: Boolean value. True for getting state proof in a pool response
Response format
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QueryGetDidResponse{
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        "did": {
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               "id": "GEzcdDLhCpGCYRHW82kjHd",
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               "verkey": "~HmUWn928bnFT6Ephf65YXv",
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               "alias": "DID for Alice"
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             },
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}
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ATTRIB transactions
Create ATTRIB
cheqd-sdk function
build_create_attrib_request(did, raw)
Request format
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CreateAttribRequest 
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{
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    "data": {
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               "did": "GEzcdDLhCpGCYRHW82kjHd",
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               "raw": "{'name': 'Alice'}"
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             },
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    "owner": "GEzcdDLhCpGCYRHW82kjHd",
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    "signature": "49W5WP5jr7x1fZhtpAhHFbuUDqUYZ3AKht88gUjrz8TEJZr5MZUPjskpfBFdboLPZXKjbGjutoVascfKiMD5W7Ba",
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    "metadata": {}
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}
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did (base58-encoded string): Target DID as base58-encoded string for 16 or 32 byte DID value.
raw (JSON; mutually exclusive with hash and enc): Raw data represented as JSON, where the key is attribute name and value is attribute value.
Response format
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CreateAttribResponse {
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    "key": "attrib:GEzcdDLhCpGCYRHW82kjHd" 
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}
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key(string): A unique key is used to store these attributes in a state
Response validation
A DID transaction with id from UpdateAttribRequestmust already be in a ledger created by CreateDidRequest
CreateAttribRequest must be signed by the DID from did field. It means that this DID must be an owner of this ATTRIB transaction.
Update ATTRIB
cheqd-sdk function
build_update_attrib_request(id, raw)
Request format
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UpdateAttribRequest 
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{
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    "data": {
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               "did": "GEzcdDLhCpGCYRHW82kjHd",
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               "raw": "{'name': 'Alice'}"
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             },
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    "owner": "GEzcdDLhCpGCYRHW82kjHd",
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    "signature": "49W5WP5jr7x1fZhtpAhHFbuUDqUYZ3AKht88gUjrz8TEJZr5MZUPjskpfBFdboLPZXKjbGjutoVascfKiMD5W7Ba",
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    "metadata": {}
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}
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did (base58-encoded string): Target DID as base58-encoded string for 16 or 32 byte DID value.
raw (JSON; mutually exclusive with hash and enc): Raw data represented as JSON, where the key is attribute name and value is attribute value.
Response format
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UpdateAttribResponse {
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        "key": "attrib:GEzcdDLhCpGCYRHW82kjHd" 
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}
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key(string): A unique key is used to store these attributes in a state
Response validation
A DID transaction with id from UpdateAttribRequestmust already be in a ledger created by CreateDidRequest
UpdateAttribRequest must be signed by DID from did field. It means that this DID must be an owner of this ATTRIB transaction.
Get ATTRIB
cheqd-sdk function
build_query_get_attrib(did)
did (base58-encoded string) Target DID as base58-encoded string for 16 or 32 byte DID value.
Request format
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Request 
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{
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    "path": "/store/cheqd/key",
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    "data": <bytes>,
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    "height": 642,
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    "prove": true
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}
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path: Path for RPC endpoint for cheqd pool
data: Query with an entity key from a state. String did:<id> encoded to bytes
height: Ledger height (size). None for auto calculation
prove: Boolean value. True for getting state proof in a pool response
Response format
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QueryGetAttribResponse{
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        "attrib": {
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               "did": "GEzcdDLhCpGCYRHW82kjHd",
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               "raw": "{'name': 'Alice'}"
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             },
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}
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SCHEMA transactions
Create SCHEMA
cheqd-sdk function
build\_create\_schema\_request\(version, name, attr\_names\)
Request format
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CreateSchemaRequest 
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{
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    "data": {
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            "version": "1.0",
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            "name": "Degree",
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            "attr_names": ["undergrad", "last_name", "first_name", "birth_date", "postgrad", "expiry_date"]
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             },
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    "owner": "GEzcdDLhCpGCYRHW82kjHd",
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    "signature": "49W5WP5jr7x1fZhtpAhHFbuUDqUYZ3AKht88gUjrz8TEJZr5MZUPjskpfBFdboLPZXKjbGjutoVascfKiMD5W7Ba",
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    "metadata": {}
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}
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attr_names(array): Array of attribute name strings (125 attributes maximum)
name(string): Schema's name string
version(string): Schema's version string
Response format
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CreateSchemaResponse {
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        "key": "schema:GEzcdDLhCpGCYRHW82kjHd:Degree:1.0" 
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}
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key(string): A key is used to store this schema in a state
Response validation
A SCHEMA transaction with DID from owner field must already be in a ledger created by CreateDidRequest
CreateSchemaRequest must be signed by DID from owner field.
Get Schema
cheqd-sdk function
build\_query\_get\_schema\(name, version, owner\)
name(string): Schema's name string
version(string): Schema's version string
owner (string): Schema's owner did
Request format
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Request 
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{
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    "path": "/store/cheqd/key",
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    "data": <bytes>,
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    "height": 642,
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    "prove": true
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}
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path: Path for RPC Endpoint for cheqd pool
data: Query with an entity key from a state. String schema:<owner>:<name>:<version> encoded to bytes
height: Ledger height (size). None for auto calculation;
prove: Boolean value. True for getting state proof in a pool response.
Response format
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QueryGetSchemaResponse{
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        "attrib": {
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                "version": "1.0",
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                "name": "Degree",
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                "attr_names": ["undergrad", "last_name", "first_name", "birth_date", "postgrad", "expiry_date"]
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             },
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}
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CRED_DEF
Create Credential Definition
cheqd-sdk function
build\_create\_cred\_def\_request\(cred\_def, schema\_id, signature\_type, tag\)
Request format
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CreateCredDefRequest 
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{
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    "data": {
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                "signature_type": "CL",
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                "schema_id": "schema:GEzcdDLhCpGCYRHW82kjHd:Degree:1.0",
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                "tag": "some_tag",    
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                "cred_def": {
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                    "primary": ....,
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                    "revocation": ....
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            },
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    "owner": "GEzcdDLhCpGCYRHW82kjHd",
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    "signature": "49W5WP5jr7x1fZhtpAhHFbuUDqUYZ3AKht88gUjrz8TEJZr5MZUPjskpfBFdboLPZXKjbGjutoVascfKiMD5W7Ba",
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    "metadata": {}
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}
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cred_def (dict): Dictionary with Credential Definition's data:
primary (dict): Primary credential public key
revocation (dict): Revocation credential public key
schema_id (string): Schema's key from a state
signature_type (string): Type of the Credential Definition (that is credential signature). CL (Camenisch-Lysyanskaya) is the only supported type now.
tag (string, optional): A unique tag to have multiple public keys for the same Schema and type issued by the same DID. A default tag tag will be used if not specified.
Response format
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CreateCredDefResponse {
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        "key": "cred_def:GEzcdDLhCpGCYRHW82kjHd:schema:GEzcdDLhCpGCYRHW82kjHd:Degree:1.0:some_tag:CL" 
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}
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key(string): A unique key that is used to store this Credential Definition in a state
Response validation
A CRED_DEF transaction with DID from owner field must already be in a ledger created by CreateDidRequest
CreateCredDefRequest must be signed by DID from owner field.
Get Credential Definition
cheqd-sdk function
build\_query\_get\_cred\_def\(name, version, owner\)
schema_id(string): Schema's key from a state
signature_type(string): Type of the Credential Definition (that is credential signature). CL (Camenisch-Lysyanskaya) is the only supported type now.
owner (string): Credential Definition's owner DID
tag (string, optional): A unique tag to have multiple public keys for the same Schema and type issued by the same DID. A default tag tag will be used if not specified.
Request format
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Request 
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{
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    "path": "/store/cheqd/key",
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    "data": <bytes>,
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    "height": 642,
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    "prove": true
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}
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path: Path for RPC endpoint for cheqd pool
data: Query with an entity key from a state. String cred_def:<owner>:<schema_id>:<tag>:<signature_type> encoded to bytes
height: Ledger height (size). None for auto calculation
prove: Boolean value. True for getting state proof in a pool response.
Response format
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QueryGetCredDefResponse{
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    "cred_def": {
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            "signature_type": "CL",
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            "schema_id": "schema:GEzcdDLhCpGCYRHW82kjHd:Degree:1.0",
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            "tag": "some_tag",    
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            "cred_def": {
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                "primary": "...",// Primary
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                "revocation": "..." // Revocation registry
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        },
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}
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