payd

Payd is a basic dummy wallet (do not use this) for demonstrating the BIP 270 / Payment Protocol flow.

It has a random master key, created at startup and a single user support for now and no authentication. Seriously, don't use this wallet at the moment expect for demonstration purposes.

This wallet has an Invoice interface with CRUD operations for creating payment invoices and also implements the Wallet Payment Protocol Interface, used to integration with payment protocol servers.

This is written in go and integrates with servers running the Payment Protocol Interface.

Exploring Endpoints

To explore the endpoints and functionality, run the server using go run cmd/rest-server/main.go and navigate to Swagger or go to the GitHub Pages hosting the spec here where the endpoints and their models are described in detail.

Configuring PayD

The server has a series of environment variables that allow you to configure the behaviours and integrations of the server. Values can also be passed at build time to provide information such as build information, region, version etc.

Server

Key	Description	Default
SERVER_PORT	Port which this server should use	:8443
SERVER_HOST	Host name under which this server is found	payd:8443
SERVER_SWAGGER_ENABLED	If set to true we will expose an endpoint hosting the Swagger docs	true
SERVER_SWAGGER_HOST	The host that swagger will point its api requests to	localhost:8443

Environment / Deployment Info

Key	Description	Default
ENV_ENVIRONMENT	What enviornment we are running in, for example 'production'	dev
ENV_REGION	Region we are running in, for example 'eu-west-1'	local
ENV_COMMIT	Commit hash for the current build	test
ENV_VERSION	Semver tag for the current build, for example v1.0.0	v0.0.0
ENV_BUILDDATE	Date the code was build	Current UTC time

Logging

Key	Description	Default
LOG_LEVEL	Level of logging we want within the server (debug, error, warn, info)	info

DB

Key	Description	Default
DB_TYPE	Type of db you're connecting to (sqlite, postgres,mysql) sqlite only supported currently	sqlite
DB_DSN	Connection string for the db	file:data/wallet.db?_foreign_keys=true&pooled=true
DB_SCHEMA_PATH	Location of the data base migration scripts	data/sqlite/migrations
DB_MIGRATE	If true we will check the db version and apply missing migrations	true

Headers Client

If validating using SPV you will need to run a Headers Client, this will sync headers as they are mined and provide block and merkle proof information.

Key	Description	Default
HEADERSCLIENT_ADDRESS	Uri for the headers client you are using	http://headersv:8080
HEADERSCLIENT_TIMEOUT	Timeout in seconds for headers client queries	30

Wallet

Key	Description	Default
WALLET_NETWORK	Bitcoin network we're connected to (regtest, stn, testnet,regtest)	regtest
WALLET_SPVREQUIRED	If true we will require full SPV envelopes to be sent as part of payments	true
WALLET_PAYMENTEXPIRY	Duration in hours that invoices will be valid for	24

Working with PayD

There are a set of makefile commands listed under the Makefile which give some useful shortcuts when working with the repo.

Some of the more common commands are listed below:

make pre-commit - ensures dependencies are up to date and runs linter and unit tests.

make build-image - builds a local docker image, useful when testing PayD in docker.

make run-compose - runs PayD in compose using the latest available image.

make run-compose-faucet - runs a local payD instance that connects to the infra.bitcoinsv.io dpp proxy. Used to receive funds from faucet.bitcoinsv.io.

make run-compose-local - will run payd and use a local image built using the above make build-image command.

Using the Faucet

There is a testnet 'faucet' setup at faucet.bitcoinsv.io that can be used to get funds from.

Because of the new invoice based payments system, this can send funds to any wallet that also supports invoice based payments.

To get funds, simply run make run-compose-faucet. This will run a local payd instance and connect it to the faucet infrastructure.

Next, send the following call to your local payd instance:

curl --location --request POST 'http://localhost:8443/api/v1/invoices' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--data-raw '{
    "satoshis":1000
}'

This will create an invoice and also connect your payd to the faucet dpp server which orchestrates the payments.

You will get a response back like this:

{
    "createdAt": "2022-08-03T12:41:57.967516Z",
    "deletedAt": null,
    "description": null,
    "expiresAt": "2022-08-04T12:41:57.967516Z",
    "id": "DBVb00g",
    "paymentReceivedAt": null,
    "reference": null,
    "refundTo": null,
    "refundedAt": null,
    "satoshis": 200,
    "state": "pending",
    "updatedAt": "2022-08-03T12:41:57Z"
}

Copy the "id" and then go to faucet.bitcoinsv.io, in the box for the URL enter https://infra.bitcoinsv.io/dpp/api/v1/payment/DBVb00g where the id at the end, is the id returned from the above call.

Hit the Pay To URL button and the funds requested will be sent to your local wallet.

For further information view the Liteclient Documentation.

Releases

You can view the latest releases on our Github Releases page.

We also publish docker images which can be found on Docker Hub.

CI / CD

We use github actions to test and build the code.

If a new release is required, after your PR is approved and code added to master, simply add a new semver tag and a GitHub action will build and publish your code as well as create a GitHub release.