124 lines
3.4 KiB
TypeScript
124 lines
3.4 KiB
TypeScript
import { Magic as PythMagic } from '@pythnetwork/client';
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import { AccountInfo, Connection, PublicKey } from '@solana/web3.js';
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import SwitchboardProgram from '@switchboard-xyz/sbv2-lite';
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import BN from 'bn.js';
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import { I80F48, I80F48Dto } from '../numbers/I80F48';
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const SBV1_DEVNET_PID = new PublicKey(
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'7azgmy1pFXHikv36q1zZASvFq5vFa39TT9NweVugKKTU',
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);
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const SBV1_MAINNET_PID = new PublicKey(
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'DtmE9D2CSB4L5D6A15mraeEjrGMm6auWVzgaD8hK2tZM',
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);
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let sbv2DevnetProgram;
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let sbv2MainnetProgram;
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export class StubOracle {
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public price: I80F48;
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public lastUpdated: BN;
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static from(
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publicKey: PublicKey,
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obj: {
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group: PublicKey;
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mint: PublicKey;
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price: I80F48Dto;
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lastUpdated: BN;
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},
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): StubOracle {
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return new StubOracle(
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publicKey,
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obj.group,
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obj.mint,
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obj.price,
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obj.lastUpdated,
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);
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}
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constructor(
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public publicKey: PublicKey,
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public group: PublicKey,
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public mint: PublicKey,
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price: I80F48Dto,
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lastUpdated: BN,
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) {
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this.price = I80F48.from(price);
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this.lastUpdated = lastUpdated;
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}
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}
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// https://gist.github.com/microwavedcola1/b741a11e6ee273a859f3ef00b35ac1f0
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export function parseSwitchboardOracleV1(accountInfo: AccountInfo<Buffer>): {
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price: number;
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lastUpdatedSlot: number;
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} {
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const price = accountInfo.data.readDoubleLE(1 + 32 + 4 + 4);
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const lastUpdatedSlot = parseInt(
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accountInfo.data.readBigUInt64LE(1 + 32 + 4 + 4 + 8).toString(),
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);
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return { price, lastUpdatedSlot };
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}
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export function parseSwitchboardOracleV2(
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program: SwitchboardProgram,
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accountInfo: AccountInfo<Buffer>,
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): { price: number; lastUpdatedSlot: number } {
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const price = program.decodeLatestAggregatorValue(accountInfo)!.toNumber();
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const lastUpdatedSlot = program
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.decodeAggregator(accountInfo)
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.latestConfirmedRound!.roundOpenSlot!.toNumber();
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if (!price || !lastUpdatedSlot)
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throw new Error('Unable to parse Switchboard Oracle V2');
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return { price, lastUpdatedSlot };
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}
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/**
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*
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* @param accountInfo
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* @returns ui price
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*/
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export async function parseSwitchboardOracle(
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accountInfo: AccountInfo<Buffer>,
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connection: Connection,
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): Promise<{ price: number; lastUpdatedSlot: number }> {
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if (accountInfo.owner.equals(SwitchboardProgram.devnetPid)) {
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if (!sbv2DevnetProgram) {
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sbv2DevnetProgram = await SwitchboardProgram.loadDevnet(connection);
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}
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return parseSwitchboardOracleV2(sbv2DevnetProgram, accountInfo);
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}
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if (accountInfo.owner.equals(SwitchboardProgram.mainnetPid)) {
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if (!sbv2MainnetProgram) {
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sbv2MainnetProgram = await SwitchboardProgram.loadMainnet(connection);
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}
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return parseSwitchboardOracleV2(sbv2MainnetProgram, accountInfo);
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}
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if (
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accountInfo.owner.equals(SBV1_DEVNET_PID) ||
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accountInfo.owner.equals(SBV1_MAINNET_PID)
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) {
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return parseSwitchboardOracleV1(accountInfo);
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}
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throw new Error(`Should not be reached!`);
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}
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export function isSwitchboardOracle(accountInfo: AccountInfo<Buffer>): boolean {
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if (
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accountInfo.owner.equals(SBV1_DEVNET_PID) ||
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accountInfo.owner.equals(SBV1_MAINNET_PID) ||
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accountInfo.owner.equals(SwitchboardProgram.devnetPid) ||
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accountInfo.owner.equals(SwitchboardProgram.mainnetPid)
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) {
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return true;
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}
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return false;
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}
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export function isPythOracle(accountInfo: AccountInfo<Buffer>): boolean {
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return accountInfo.data.readUInt32LE(0) === PythMagic;
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}
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