sub-encoder

sub-encoder

Generate sub encodings for key/value stores

Usage

const enc = new SubEncoder()
const subA = enc.sub('sub-a')
const subB = enc.sub('sub-b', 'binary') // subs support custom key encodings

await bee.put('k1', 'b')
await bee.put('a1', 'a1', { keyEncoding: subA })
await bee.put('b1', 'b1', { keyEncoding: subB })

// k1 as normal
await bee.get('k1')
// a1 from the sub
await bee.get('a1', { keyEncoding: subA })

// also supports read streams
for await (const node of bee.createReadStream({ keyEncoding: subA })) {
  // Iterates everything in the A sub
}

// The range options will be encoded properly too
for await (const node of bee.createReadStream({ lt: 'b2' }, { keyEncoding: subB })) {
}

API

const enc = new SubEncoder([prefix, encoding])

Create a new SubEncoder. Optionally set the initial prefix and encoding.

prefix can be string or Buffer. If set, acts as an initial sub instead of starting at the Hyperbee's base level.

subEnc = enc.sub(prefix, [encoding])

Make a new sub. Returns a SubEncoder, so subs can easily be nested.

prefix can be string or Buffer.

buf = enc.encode(key)

Encode a key.

key = enc.decode(buf)

Decode a key.

encodedRange = enc.encodeRange(range)

Encode a range.

License

Apache-2.0