Nachos Pillage Milwaukee

    @metaplex-foundation/beet
    TypeScript icon, indicating that this package has built-in type declarations

    0.7.1 • Public • Published

    @metaplex-foundation/beet

    Strict borsh compatible de/serializer.

    Table of Contents generated with DocToc

    Features

    • fully composable, i.e. coption(array(utf8String)) is handled correctly
    • structs can be nested and composed
    • pre-computes byteSize of any fixed size type, no matter how deeply nested or composed it is
    • converts non-fixed types to their fixed versions simply by providing a value or serialized data
    • fixed size and fixable structs expose identical serialize/deserialize API and perform conversions under the hood when needed
    • logs struct configs including byte sizes as well as de/serialization tasks for easy diagnostics
    beet:debug struct GameStruct {
    beet:debug   win: u8 1 B
    beet:debug   totalWin: u16 2 B
    beet:debug   whaleAccount: u128 16 B
    beet:debug   losses: i32 4 B
    beet:debug } 23 B +0ms
    beet:trace serializing [GameStruct] _GameScore { win: 1, totalWin: 100, whaleAccount: <BN: fffffffffffffffffffffffffffffffb>, losses: -234 } to 23 bytes buffer +0ms
    beet:trace deserializing [GameStruct] from 23 bytes buffer +2ms
    beet:trace <Buffer 01 64 00 fb ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 16 ff ff ff> +0ms
    beet:trace [
    beet:trace     1, 100,   0, 251, 255, 255,
    beet:trace   255, 255, 255, 255, 255, 255,
    beet:trace   255, 255, 255, 255, 255, 255,
    beet:trace   255,  22, 255, 255, 255
    beet:trace ] +0ms
    

    Fixed Size vs. Dynamic Types

    Beet is optimized for fixed types as this allows logging detailed diagnostics about the structure of data that it is processing as well as avoiding Buffer resizes.

    Only beets that have fixed in the name are of fixed size, all others are fixable types which expose toFixedFromData and toFixedFromValue methods to convert to a fixed beet from serialized data or a value respectively.

    Beet provides the FixableBeetStruct to de/serialize args that have non-fixed size fields.

    Thus beet implements the entire borsh spec, however if you want a library that processes dynamic types directly use one of the alternatives, i.e. borsh-js.

    API

    Please find the API docs here.

    Examples

    Single Fixed Struct Configuration

    import { BeetStruct, i32, u16, u8 } from '@metaplex-foundation/beet'
    
    class Result {
      constructor(
        readonly win: number,
        readonly totalWin: number,
        readonly losses: number
      ) {}
    
      static readonly struct = new BeetStruct<Result>(
        [
          ['win', u8],
          ['totalWin', u16],
          ['losses', i32],
        ],
        (args) => new Result(args.win!, args.totalWin!, args.losses!),
        'Results'
      )
    }

    Single Fixable Struct Configuration

    import { FixableBeetStruct, i32, u16, u8, array } from '@metaplex-foundation/beet'
    
    class Result {
      constructor(
        readonly win: number,
        readonly totalWin: number,
        readonly losses: number[]
      ) {}
    
      static readonly struct = new FixableBeetStruct<Result>(
        [
          ['win', u8],
          ['totalWin', u16],
          ['losses', array(i32)],
        ],
        (args) => new Result(args.win!, args.totalWin!, args.losses!),
        'Results'
      )
    }

    Nested Struct Configuration

    NOTE: uses Result struct from the above example for the results field of Trader

    import { BeetStruct, fixedSizeUtf8String } from '@metaplex-foundation/beet'
    class Trader {
      constructor(
        readonly name: string,
        readonly results: Results,
        readonly age: number
      ) {}
    
      static readonly struct = new BeetStruct<Trader>(
        [
          ['name', fixedSizeUtf8String(4)],
          ['results', Results.struct],
          ['age', u8],
        ],
        (args) => new Trader(args.name!, args.results!, args.age!),
        'Trader'
      )
    }
      
    const trader = new Trader('bob ', new Results(20, 1200, -455), 22)
    const [buf] = Trader.struct.serialize(trader)
    const [deserializedTrader] = Trader.struct.deserialize(buf)

    Struct with non-primitive fields

    NOTE: depends on beet-solana extension package for the PublicKey implementation

    import * as web3 from '@solana/web3.js'
    import * as beet from '@metaplex-foundation/beet'
    import * as beetSolana from '@metaplex-foundation/beet-solana'
    
    type InstructionArgs = {
      instructionDiscriminator: number[]
      authority: web3.PublicKey
      maybePublickKey: beet.COption<web3.PublicKey>
    }
    
    // Uses the BeetArgsStruct wrapper around BeetStruct
    const createStruct = new beet.BeetArgsStruct<InstructionArgs>(
      [
        ['instructionDiscriminator', beet.fixedSizeArray(beet.u8, 8)],
        ['authority', beetSolana.publicKey],
        ['maybePublickKey', beet.coption(beetSolana.publicKey)],
      ],
      'InstructionArgs'
    )

    Using Beet Primitives Directly

    Fixed Size

    import { u8 } from '@metaplex-foundation/beet'
    const n = 1
    const buf = Buffer.alloc(u8.byteSize)
    u8.write(buf, 0, n)
    u8.read(buf, 0) // === 1

    Dynamic Size

    import { u8, array } from '@metaplex-foundation/beet'
    const xs = [ 1, 2 ]
    const beet = array(u8)
    const fixedBeet = beet.toFixedFromValue(xs)
    const buf = Buffer.alloc(fixedBeet.byteSize)
    fixedBeet.write(buf, 0, xs)
    fixedBeet.read(buf, 0) // === [ 1, 2 ]

    Using Beet Composites Directly

    NOTE: use Result struct from the above example to wrap in a Composite type

    Option

    NOTE: that the coption is a fixable beet since it has a different size for the Some vs. the None case.

    const resultOption: Beet<COption<Result>> = coption(Result.struct)
    
    const result = new Result(20, 1200, -455)
    const fixedBeet = resultOption.toFixedFromValue(result)
    
    const buf = Buffer.alloc(fixedBeet.byteSize)
    fixedBeet.write(buf, 0, result)
    beet.read(buf, 0) // same  as result

    Array

    Uniform Fixed Size
    const resultArray: Beet<Array<Result>> = uniformFixedSizeArray(Result.struct, 3)
    const results =[ new Result(20, 1200, -455), new Result(3, 999, 0), new Result(30, 100, -3) ]
    const buf = Buffer.alloc(resultArray.byteSize)
    beet.write(buf, 0, results)
    beet.read(buf, 0) // same  as results
    Dynamic Size
    const resultArray: Beet<Array<Result>> = array(Result.struct)
    const results =[ new Result(20, 1200, -455), new Result(3, 999, 0), new Result(30, 100, -3) ]
    const fixedBeet = resultsArray.toFixedFromValue(results)
    
    const buf = Buffer.alloc(fixedBeet.byteSize)
    fixedBeet.write(buf, 0, results)
    fixedBeet.read(buf, 0) // same  as results

    Enum with Data Variants

    NOTE: this sample is what solita will generate from a provided IDL. solita is the recommended way to create TypeScript that uses beet for de/serialization.

    // -----------------
    // Setup
    // -----------------
    type CollectionInfoRecord = {
      V1: {
        symbol: string
        verifiedCreators: web3.PublicKey[]
        whitelistRoot: number[] /* size: 32 */
      }
      V2: { collectionMint: web3.PublicKey }
    }
    type CollectionInfo = beet.DataEnumKeyAsKind<CollectionInfoRecord>
    
    const collectionInfoBeet = beet.dataEnum<CollectionInfoRecord>([
      [
        'V1',
        new beet.FixableBeetArgsStruct<CollectionInfoRecord['V1']>(
          [
            ['symbol', beet.utf8String],
            ['verifiedCreators', beet.array(beetSolana.publicKey)],
            ['whitelistRoot', beet.uniformFixedSizeArray(beet.u8, 32)],
          ],
          'CollectionInfoRecord["V1"]'
        ),
      ],
    
      [
        'V2',
        new beet.BeetArgsStruct<CollectionInfoRecord['V2']>(
          [['collectionMint', beetSolana.publicKey]],
          'CollectionInfoRecord["V2"]'
        ),
      ],
    ]) as beet.FixableBeet<CollectionInfo>
    
    // -----------------
    // Usage
    // -----------------
    const collectionV1: CollectionInfo & { __kind: 'V1' } = {
      __kind: 'V1',
      symbol: 'SYM',
      verifiedCreators: [new web3.PublicKey(1), new web3.PublicKey(2)],
      whitelistRoot: new Array(32).fill(33),
    }
    const fixedBeet = collectionInfoBeet.toFixedFromValue(collectionV1)
    
    // Serialize
    const buf = Buffer.alloc(fixedBeet.byteSize)
    fixedBeet.write(buf, 0, collectionV1)
    
    // Deserialize
    const val = fixedBeet.read(buf, 0)
    console.log(val)

    LICENSE

    Apache-2.0

    Keywords

    none

    Install

    npm i @metaplex-foundation/beet

    DownloadsWeekly Downloads

    90,592

    Version

    0.7.1

    License

    Apache-2.0

    Unpacked Size

    177 kB

    Total Files

    54

    Last publish

    Collaborators

    • blockiosaurus
    • 0x_febo
    • stegabob
    • svc01-metaplex
    • samuelvanderwaal
    • brandontulsi
    • lorisleiva
    • roederw
    • thlorenz
    • austbotm