ppppp-db

The message database for ppppp.

Installation

We're not on npm yet. In your package.json, include this as

"ppppp-db": "github:staltz/ppppp-db"

Usage

It's a secret-stack plugin much like ssb-db2. Other than that, you can also use the feed format const FeedV1 = require('ppppp-db/feed-v1').

You can use it like

const p = require('node:util').promisify

const keypair = Keypair.generate('ed25519', 'alice')
const DIR = path.join(os.tmpdir(), 'ppppp-db-temp')

const pzp = require('secret-stack/bare')()
  .use(require('secret-stack/plugins/net'))
  .use(require('secret-handshake-ext/secret-stack'))
  .use(require('ppppp-db'))
  .use(require('ssb-box'))
  .call(null, {
    shse: { caps: require('ppppp-caps')
    },
    global: {
      keypair,
      path: DIR
      }
    })


await pzp.db.loaded()

const account = await p(pzp.db.account.create)({
  keypair,
  subdomain: 'person',
})

const record = await p(pzp.db.feed.publish)({
  account,
  domain: 'post',
  data: { text: 'I am 1st post' },
})

console.log("account:", account, "record:", JSON.stringify(record, null, 2))

//account: 8VLSqiWCX26w1173212RBRvY8N7MEbY3ar8fv22cGx6b record: {
//  "id": "H8dQH6LzeW2He7oRVXKP6u6WbC1GQ8EABh3PgS587L3w",
//  "msg": {
//    "data": {
//      "text": "I am 1st post"
//    },
//    "metadata": {
//      "dataHash": "39FJFLNXj7L83nFJbrrbADdKCeFe2vP2ikuNZXVKYSXP",
//      "dataSize": 24,
//      "account": "8VLSqiWCX26w1173212RBRvY8N7MEbY3ar8fv22cGx6b",
//      "accountTips": [
//        "8VLSqiWCX26w1173212RBRvY8N7MEbY3ar8fv22cGx6b"
//      ],
//      "tangles": {
//        "9HdQRpQNHgxiuxRy8eSEvEDG3nAL4EAYYkYHiHbU7Xqo": {
//          "depth": 1,
//          "prev": [
//            "9HdQRpQNHgxiuxRy8eSEvEDG3nAL4EAYYkYHiHbU7Xqo"
//          ]
//        }
//      },
//      "domain": "post",
//      "v": 4
//    },
//    "sigkey": "4mjQ5aJu378cEu6TksRG3uXAiKFiwGjYQtWAjfVjDAJW",
//    "sig": "WNY4WZiT3SLQKFn4J6ESLn8WqPfLRh5fPdTiZTkvDNf5u79wFmXv367UV93XjyzACi6C3fgwZkstq5JczCk3YPH"
//  },
//  "received": 1712503926457
//}

API

NOTE: All functions that take a callback (cb) return a promise instead if you omit the callback.

pzp.db.installEncryptionFormat(encryptionFormat)

If encryptionFormat conforms to the ssb-encryption-format spec, then this method will install the encryptionFormat in this database instance, meaning that you can now encrypt and decrypt messages using that encryption format.

`pzp.db.loaded(cb)

Calls back when the database is ready to be used.

`pzp.db.add(msg: Msg, tangleID: MsgId | null, cb: CB)

Adds a message to the database. Usually performed automatically when you do other things like publishing messages or syncing from other peers.

pzp.db.account.find({ keypair?: KeypairPublicSlice, subdomain: string}, cb: CB<string>)

Find the account that contains this keypair (or the implicit config.global.keypair) under the given subdomain (will be converted to an actual msg domain).

pzp.db.account.create({ keypair?: Keypair, subdomain: string }, cb: CB<string>)

Create an account (root msg) for the given keypair (or the implicit config.global.keypair) under the given subdomain (will be converted to an actual msg domain).

pzp.db.account.findOrCreate({ keypair?: Keypair, subdomain: string }, cb: CB<string>)

Find or create an account (root msg) for the given keypair (or the implicit config.global.keypair) under the given domain (will be converted to an actual msg domain).

pzp.db.account.add({ account: string, keypair: Keypair | KeypairPublicSlice, powers?: Array<AccountPower>, consent?: string }, cb: CB<RecPresent>)

Add the given keypair to the given account, authorized by the given consent (or implicitly created on the fly if the keypair contains the private key) with the specified powers (defaulting to no powers).

pzp.db.account.del({ account: string, keypair: KeypairPublicSlice }, cb: CB<RecPresent>)

Remove the given keypair from the given account.

pzp.db.account.consent({ keypair?: KeypairPrivateSlice, account: string }) => string

Create a consent signature for the given keypair (or the implicit config.global.keypair) to be added to the given account.

`pzp.db.account.has({ keypair?: KeypairPublicSlice, account: string }, cb: CB)

Does this account have this keypair (or the implicit config.global.keypair)?

feed: {

pzp.db.feed.publish({ keypair?: Keypair, encryptionFormat?: string, data: object, domain: string, account: string, tangles?: Array<MsgID> }, cb: CB<RecPresent>)

Publishes a message to the feed of the given domain.

pzp.db.feed.getID(accountId: string, domain: string) => string

Gets the moot ID (the ID of an account's domain's root message) for a given account and domain. That message is deterministic so you can calculate its ID even if you e.g. haven't been given it directly.

pzp.db.feed.findMoot(accountId: string, domain: string, cb: CB<RecPresent | null>)

Gets the moot for the specified account and domain from the database. A moot is the root message for an account's domain.

pzp.db.getRecord(msgID: MsgID, cb: CB<RecPresent | null>)

Gets a message's record using its message ID, if you have it in your database. The record has the shape { id: string, msg: Msg, received: number }.

pzp.db.get(msgID: MsgID, cb: CB<Msg | null>)

Gets a message using its message ID, if you have it in your database.

pzp.db.del(msgID: MsgID, cb: CB<void>)

Deletes a specific message from your database.

`pzp.db.erase(msgID: MsgID, cb: CB)

Erases a specific message in your database. Erasing, as opposed to deleting, only removes a message's data. Metadata is kept and the message integrity can still be verified.

pzp.db.ghosts.add({ tangleID: MsgID, msgID: MsgID, span: number }, cb: CB<void>)

Adds a ghost to the database.

pzp.db.ghosts.get(tangleID: MsgID) => Array<string>

Gets a ghost from the database.

pzp.db.ghosts.getMinDepth(tangleID: MsgID) => number

Gets the depth of the ghost in the tangle with the lowest depth.

pzp.db.onRecordAdded

An obz observable that triggers when a record is added to the database.

pzp.db.onRecordDeletedOrErased

An obz observable that triggers when a record is either deleted or erased. Erasing means that only the data field of the message has been cleared.

pzp.db.getTangle(tangleID: MsgID, cb: CB<DBTangle | null>)

Tries to get a DBTangle object representing an entire tangle in the database.

pzp.db.msgs() => AsyncGenerator<Msg>

Returns an async generator letting you iterate over all messages in the database.

pzp.db.records() => AsyncGenerator<Rec>

Returns an async generator letting you iterate over all records in the database. The records have the shape { id: string, msg: Msg, received: number } if they exist but they might also be deleted.

pzp.db.log.stats(cb: CB<{ totalBytes: number; deletedBytes: number }>)

Returns some size stats on the log file, where messages are stored.

pzp.db.log.compact(cb: CB<void>)

Makes the log file (the message store) take up less space by compacting it into the space freed by messages that have been deleted.

License

Copyright © 2023-2024 Andre 'Staltz' Medeiros [email protected] and contributors. Licensed under the MIT license.