@kamino-finance/scope-sdk
Version:
Scope Oracle SDK
140 lines (122 loc) • 4 kB
text/typescript
/* eslint-disable @typescript-eslint/no-unused-vars */
import {
address,
Address,
fetchEncodedAccount,
fetchEncodedAccounts,
GetAccountInfoApi,
GetMultipleAccountsApi,
Rpc,
} from "@solana/kit"
/* eslint-enable @typescript-eslint/no-unused-vars */
import BN from "bn.js" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as borsh from "@coral-xyz/borsh" // eslint-disable-line @typescript-eslint/no-unused-vars
import { borshAddress } from "../utils" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as types from "../types" // eslint-disable-line @typescript-eslint/no-unused-vars
import { PROGRAM_ID } from "../programId"
export interface MintsToScopeChainsFields {
oraclePrices: Address
seedPk: Address
seedId: BN
bump: number
mapping: Array<types.MintToScopeChainFields>
}
export interface MintsToScopeChainsJSON {
oraclePrices: string
seedPk: string
seedId: string
bump: number
mapping: Array<types.MintToScopeChainJSON>
}
/** Map of mints to scope chain only valid for a given price feed */
export class MintsToScopeChains {
readonly oraclePrices: Address
readonly seedPk: Address
readonly seedId: BN
readonly bump: number
readonly mapping: Array<types.MintToScopeChain>
static readonly discriminator = Buffer.from([
156, 236, 56, 20, 39, 141, 42, 183,
])
static readonly layout = borsh.struct<MintsToScopeChains>([
borshAddress("oraclePrices"),
borshAddress("seedPk"),
borsh.u64("seedId"),
borsh.u8("bump"),
borsh.vec(types.MintToScopeChain.layout(), "mapping"),
])
constructor(fields: MintsToScopeChainsFields) {
this.oraclePrices = fields.oraclePrices
this.seedPk = fields.seedPk
this.seedId = fields.seedId
this.bump = fields.bump
this.mapping = fields.mapping.map(
(item) => new types.MintToScopeChain({ ...item })
)
}
static async fetch(
rpc: Rpc<GetAccountInfoApi>,
address: Address,
programId: Address = PROGRAM_ID
): Promise<MintsToScopeChains | null> {
const info = await fetchEncodedAccount(rpc, address)
if (!info.exists) {
return null
}
if (info.programAddress !== programId) {
throw new Error("account doesn't belong to this program")
}
return this.decode(Buffer.from(info.data))
}
static async fetchMultiple(
rpc: Rpc<GetMultipleAccountsApi>,
addresses: Address[],
programId: Address = PROGRAM_ID
): Promise<Array<MintsToScopeChains | null>> {
const infos = await fetchEncodedAccounts(rpc, addresses)
return infos.map((info) => {
if (!info.exists) {
return null
}
if (info.programAddress !== programId) {
throw new Error("account doesn't belong to this program")
}
return this.decode(Buffer.from(info.data))
})
}
static decode(data: Buffer): MintsToScopeChains {
if (!data.slice(0, 8).equals(MintsToScopeChains.discriminator)) {
throw new Error("invalid account discriminator")
}
const dec = MintsToScopeChains.layout.decode(data.slice(8))
return new MintsToScopeChains({
oraclePrices: dec.oraclePrices,
seedPk: dec.seedPk,
seedId: dec.seedId,
bump: dec.bump,
mapping: dec.mapping.map(
(
item: any /* eslint-disable-line @typescript-eslint/no-explicit-any */
) => types.MintToScopeChain.fromDecoded(item)
),
})
}
toJSON(): MintsToScopeChainsJSON {
return {
oraclePrices: this.oraclePrices,
seedPk: this.seedPk,
seedId: this.seedId.toString(),
bump: this.bump,
mapping: this.mapping.map((item) => item.toJSON()),
}
}
static fromJSON(obj: MintsToScopeChainsJSON): MintsToScopeChains {
return new MintsToScopeChains({
oraclePrices: address(obj.oraclePrices),
seedPk: address(obj.seedPk),
seedId: new BN(obj.seedId),
bump: obj.bump,
mapping: obj.mapping.map((item) => types.MintToScopeChain.fromJSON(item)),
})
}
}