mirror of
https://github.com/getAlby/lndhub.go.git
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119 lines
3.2 KiB
Markdown
119 lines
3.2 KiB
Markdown
# Rebuilding LNDHub
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Goal of this project is to build a simple accounting system with a [LNDHub](https://github.com/BlueWallet/LndHub) compatible API that focusses on simplicity, maintainability and ease of deployment.
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[LNDHub](https://github.com/BlueWallet/LndHub) is a simple accounting system for LND. It allows users to send and receive lightning payments. Through the API people can access funds through a shared lightning node. (see overview.png diagram)
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Some design goals:
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* No runtime dependencies (all compiled into a single, simple deployable executable)
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* Use of an ORM ([gorm.io](https://gorm.io/)?)to support deployments with SQLite and PostgreSQL (default) as databases
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* Focus on offchain payments (no onchain transactions supported)
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* Plan for multiple node backends ([LND](https://github.com/lightningnetwork/lnd/) gRPC interface is the first implementation) (also through Tor)
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* Admin panel for better Ops
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* All configuration stored in the DB
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* Using constraints and functions in the DB to prevent inconsistent data
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### API endpoints
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See [LNDHub API](https://github.com/BlueWallet/LndHub/blob/master/controllers/api.js) for enpoints and request/response signatures.
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#### /create
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Create a new user account
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#### /auth
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Get new "session" access/refresh tokens. access token is required for all other API endpoints
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#### /addinvoice
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Generate a new lightning invoice
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#### /payinvoice
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Pay a lightning invoice
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#### /checkpayment/:payment_hash
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Check the status of an incoming transaction
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#### /balance
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Get the user's balanc
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#### /gettxs
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Get all transactions
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### ToDos
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- [ ] Project setup for [Echo](https://echo.labstack.com/), [gorm](https://gorm.io/) (with support for PostgreSQL and SQLite), Unit-Test setup
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- [ ] Implement first endpoints (`/create`, `/auth`, `/addinvoice`)
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- [ ] Connect to LND (gRPC API) (in the future the API implementation should be configurable)
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- [ ] ...
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### Datamodel
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* Double entry accounting?
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+ https://gist.github.com/NYKevin/9433376
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+ https://gocardless.com/guides/posts/double-entry-bookkeeping/
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+
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#### users
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```
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+ id (primary key)
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+ email (optional)
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+ login (auto generated, random string)
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+ password (auto generated, random string)
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+ refresh_token (auto generated on /auth call)
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+ access_token (auto generated on /auth call)
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+ updated_at (datetime)
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+ created_at (datetime)
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```
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#### invoices
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```
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+ id (primary key)
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+ type (enum: incoming, outgoing)
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+ user_id (foreign key, constaint)
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+ transaction_entry_id (foreign key)
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+ amount (integer, constraint >=0)
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+ memo (string)
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+ description_hash (string)
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+ payment_request (string)
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+ r_hash (string)
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+ state (string (enum: )
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+ created_at (datetime)
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+ expires_at (datetime)
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+ settled_at (datetime)
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```
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#### accounts
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```
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+ user_id
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+ type (enum: outgoing, incoming, current)
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```
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#### transaction_entries
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```
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+ user_id
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+ invoice_id
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+ credit_account_id
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+ debit_account_id
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+ amount (integer >0 constraint)
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+ created_at (datetime)
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```
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### Know Issues
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#### Self-payments
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How do we identify self-payments?
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We could use two different lightning wallets for sending and receiving. This would avoid the need to identify self-payments completely and any payment would be a proper lightning payment.
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### Links
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* [LNDHub](https://github.com/BlueWallet/LndHub) - Current nodejs implementation
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