Kin Ecosystem SDK API

marketplace API

The openapi.yaml file contains definitions of the services and models that will be available for our client to access on the server.

To edit the file you can use the online editor

JWT specs and examples:

JWT encoded messages

JWT header format

For all 3 JWTs we will use the following template:

{
	alg: string; // ES256 but can be discussed
	typ: string; // JWT
	kid: string; // identifier of the keypair that was used to sign the JWT. identifiers and public keys will be provided by signer authority. This enables using multiple private/public key pairs (a list of public keys and their ids need to be provided by signer authority to verifier in advanced)
}

Register payload

{
	// common/ standard fields
	iat: number;  // issued at - seconds from epoc
	iss: string; // issuer
	exp: number; // expiration
	sub: string; // subject - "register"

	// application fields
	user_id: string; // id of the user - or a deterministic unique id for the user (hash)
}

Example (viewable on jwt.io)

eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InNvbWVfaWQifQ.eyJpYXQiOjE1MTYyMzkwMjIsImlzcyI6ImtpayBzZXJ2ZXIiLCJleHAiOjE1MjYyMzkwMjIsInN1YiI6InJlZ2lzdGVyIiwidXNlcl9pZCI6ImFfaGFzaF9vbl9raWtfdXNlcl9pZCJ9.6DwojspQ46inlwYwn3NNH0bmQIzKd7mL0VX8V2ZmlH8aZqWF2UbK_Md5kcxgnXgq0P6tExVTr1vxpwhfj7_3dg

Spend payload

{
	iat: number;  // issued at - seconds from epoc
	iss: string; // issuer
	exp: number; // expiration
	sub: string; // subject - "spend"

	nonce: string; // optional, to create a unique pair for offer id per user
	offer: {
		id: string; // offer id - id is decided by digital service
		amount: number; // amount of kin for this offer - price
	};
	sender: {
		user_id: string; // optional: user_id who will perform the
		title: string; // order title - appears in order history
		description: string; // order description - appears in order history
	};
}

Example (viewable on jwt.io)

eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InNvbWVfaWQifQ.eyJpYXQiOjE1MTYyMzkwMjIsImlzcyI6ImtpayBzZXJ2ZXIiLCJleHAiOjE1MjYyMzkwMjIsInN1YiI6InNwZW5kIiwib2ZmZXIiOnsiaWQiOiJPMTIzMTIzMTIzIiwiYW1vdW50Ijo1MDAwfSwic2VuZGVyIjp7InRpdGxlIjoiQmx1ZSBUaGVtZSIsImRlc2NyaXB0aW9uIjoiT2NlYW4gQmx1ZSIsInVzZXJfaWQiOiJzb21lX3VzZXIifX0.BRacJ37zbbaKivWD_uhC2JXozzrHDN5B9VeG7d1BXjkpPYEfpaEy_kKF6xqp7oUMjEG2ltrOQPJ-UkFcFl6H-g

Earn payload

{
	iat: number;  // issued at - seconds from epoc
	iss: string; // issuer
	exp: number; // expiration
	sub: string; // subject - "earn"

	nonce: string; // optional, to create a unique pair for offer id per user
	offer: {
		id: string; // offer id - id is decided by digital service
		amount: number; // amount of kin for this offer - price
	};
	recipient: {
		user_id: string; // user_id who will perform the order
		title: string; // order title - appears in order history
		description: string; // order description - appears in order history
	};
}

Example (viewable on jwt.io)

eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InNvbWVfaWQifQ.eyJpYXQiOjE1MTYyMzkwMjIsImlzcyI6ImtpayBzZXJ2ZXIiLCJleHAiOjE1MjYyMzkwMjIsInN1YiI6ImVhcm4iLCJvZmZlciI6eyJpZCI6Ik8xMjMxMjMxMjMiLCJhbW91bnQiOjUwMDB9LCJyZWNpcGllbnQiOnsidGl0bGUiOiJCbHVlIFRoZW1lIiwiZGVzY3JpcHRpb24iOiJPY2VhbiBCbHVlIiwidXNlcl9pZCI6InNvbWVfdXNlciJ9fQ.R7OpvaZQIAzjQ0MSi5nC1c39oC9oN08NVKwricMyWnuMbK5FD9Qn6ecmol4JnMGE5IZA7j_LR-EEbVhhEYi57g

PayToUser payload

{
	iat: number;  // issued at - seconds from epoc
	iss: string; // issuer
	exp: number; // expiration
	sub: string; // subject - "pay_to_user"

	nonce: string; // optional, to create a unique pair for offer id per user
	offer: {
		id: string; // offer id - id is decided by digital service
		amount: number; // amount of kin for this offer - price
	};
	sender: {
		user_id: string; // optional: user_id who will perform the order
		title: string; // offer title - appears in order history
		description: string; // offer description - appears in order history
	};
	recipient: {
		user_id: string; // user_id who will receive the order
		title: string; // offer title - appears in order history
		description: string; // offer description - appears in order history
	};
}

Example (viewable on jwt.io)

eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InNvbWVfaWQifQ.eyJpYXQiOjE1MTYyMzkwMjIsImlzcyI6ImtpayBzZXJ2ZXIiLCJleHAiOjE1MjYyMzkwMjIsInN1YiI6InBheV90b191c2VyIiwib2ZmZXIiOnsiaWQiOiJPMTIzMTIzMTIzIiwiYW1vdW50Ijo1MDAwfSwic2VuZGVyIjp7InRpdGxlIjoiVGlwIEZyb20gRG9vZHkiLCJkZXNjcmlwdGlvbiI6IkRvb2R5IHRpcHBlZCB5b3UiLCJ1c2VyX2lkIjoidXNlcjpuaXR6YW4ifSwicmVjaXBpZW50Ijp7InRpdGxlIjoiVGlwIFRvIE5pdHphbiIsImRlc2NyaXB0aW9uIjoiWW91IHRpcHBlZCBOaXR6YW4iLCJ1c2VyX2lkIjoidXNlcjpkb29keSJ9fQ.GVufyAI2UkpzzLlSL7a_kb5JcdSkgBb1PnzdL7wUkIGx-IUUu_pgTecElwTbZvWrCSr_GkJ4leD1MnXHSUb_QQ

PaymentConfirmation payload

{
	iat: number;  // issued at - seconds from epoc
	iss: string; // issuer
	exp: number; // expiration
	sub: string; // subject - "payment_confirmation"

	sender_user_id: string; // user identifier - same value as given by register
	recipient_user_id: string; // user identifier - same value as given by register
	offer_id: string; // offer id - id is decided by digital service
	nonce: string; // the same as was send in the order JWT, or a default value in case none was used
	payment: {
		blockchain: string; // identifier of the blockchain network the transaction was made on
		transaction_id: string; // stellar identifier of the blockchain transaction
	};
}

Example (viewable on jwt.io)

eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6InNvbWVfaWQifQ.eyJpYXQiOjE1MTYyMzkwMjIsImlzcyI6ImtpayIsImV4cCI6MTUyNjIzOTAyMiwic3ViIjoicGF5bWVudF9jb25maXJtYXRpb24iLCJvZmZlcl9pZCI6Ik8xMjMxMjMxMjMiLCJzZW5kZXJfdXNlcl9pZCI6InVzZXI6ZG9vZHkiLCJyZWNpcGllbnRfdXNlcl9pZCI6InVzZXI6bml0emFuIiwicGF5bWVudCI6eyJibG9ja2NoYWluIjoic3RlbGxhci1tYWlubmV0IiwidHJhbnNhY3Rpb25faWQiOiJ0cmFuc2FjdGlvbjoxMjM0NSJ9fQ.-AbZOfC69eY1It43RccOXluY-sjWSi4JFvQkVKO9D2UgYU3jNPbEcBERLrqBHPSpS6f26LVpIsg5A81UQNoukw

Key Pair used in Examples

Public:

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEEVs/o5+uQbTjL3chynL4wXgUg2R9
q9UU8I5mEovUf86QZ7kOBIjJwqnzD1omageEHWwHdBO6B+dFabmdT9POxg==
-----END PUBLIC KEY-----

Private:

-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgevZzL1gdAFr88hb2
OF/2NxApJCzGCEDdfSp6VQO30hyhRANCAAQRWz+jn65BtOMvdyHKcvjBeBSDZH2r
1RTwjmYSi9R/zpBnuQ4EiMnCqfMPWiZqB4QdbAd0E7oH50VpuZ1P087G
-----END PRIVATE KEY-----

internal payment

To edit the file you can use the online editor

creating client stubs

openapi3 code generation is supported by a few projects

java

using github.com:swagger-api/swagger-codegen on branch v3.0.0-rc0 compile the maven project and run the following:

java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate -i ~/Workspace/ecosystem-api/openapi.yaml -l java  -o java_client