@metaplex-foundation/beet-solana
Solana specific extension for beet, the borsh compatible de/serializer
API
Please find the API docs here.
GPA Builders
solana-beet uses beet
s knowledge about account layouts to provide GpaBuilder
s for
them which allow to filter by account data size and content.
- Create a GPA Builder via
const gpaBuilder = GpaBuilder.fromStruct(programId, accountStruct)
- add filters via
gpaBuilder.dataSize
,gpaBuilder.addFilter
orgpaBuilder.addInnerFilter
- execute
gpaBuilder.run(connection)
which will return all accounts matching the specified filters
Examples
Simple struct with primitives
export type ResultsArgs = Pick<Results, 'win' | 'totalWin' | 'losses'>
export class Results {
constructor(
readonly win: number,
readonly totalWin: number,
readonly losses: number
) {}
static readonly struct = new BeetStruct<Results, ResultsArgs>(
[
['win', u8],
['totalWin', u16],
['losses', i32],
],
(args: ResultsArgs) => new Results(args.win!, args.totalWin!, args.losses!),
'Results'
)
}
const gpaBuilder = GpaBuilder.fromStruct(PROGRAM_ID, Results.struct)
const accounts = await gpaBuilder
.addFilter('totalWin', 8)
.addFilter('losses', -7)
.run()
Matching on Complete Nested Struct
Using Results
struct from above
export type TraderArgs = Pick<Trader, 'name' | 'results' | 'age'>
export class Trader {
constructor(
readonly name: string,
readonly results: Results,
readonly age: number
) {}
static readonly struct = new BeetStruct<Trader, TraderArgs>(
[
['name', fixedSizeUtf8String(4)],
['results', Results.struct],
['age', u8],
],
(args) => new Trader(args.name!, args.results!, args.age!),
'Trader'
)
}
const gpaBuilder = GpaBuilder.fromStruct<Trader>(
PROGRAM_ID,
Trader.struct
)
const results = {
win: 3,
totalWin: 4,
losses: -100,
}
const accounts = await gpaBuilder.addFilter('results', results).run()
Matching on Part of Nested Struct
Using Trader
struct from above
const gpaBuilder = GpaBuilder.fromStruct<Trader>(
PROGRAM_ID,
Trader.struct
)
const account = await gpaBuilder
.addInnerFilter('results.totalWin', 8)
.addInnerFilter('results.win', 2)
.run()
PublicKey
solana-beet provides a de/serializer for solana public keys. They can either be used directly or as part of a struct.
Examples
Using PublicKey Directly
import { publicKey } from '@metaplex-foundation/beet-solana'
const generatedKey = Keypair.generate().publicKey
const buf = Buffer.alloc(publicKey.byteSize)
beet.write(buf, 0, generatedKey)
beet.read(buf, 0) // same as generatedKey
PublicKey as part of a Struct Configuration
import * as web3 from '@solana/web3.js'
import * as beet from '@metaplex-foundation/beet'
import * as beetSolana from '@metaplex-foundation/beet-solana'
type InstructionArgs = {
authority: web3.PublicKey
}
const createStruct = new beet.BeetArgsStruct<InstructionArgs>(
[
['authority', beetSolana.publicKey]
],
'InstructionArgs'
)
LICENSE
Apache-2.0