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utils.ts
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utils.ts
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import { AnchorProvider } from '@coral-xyz/anchor';
import {
AddressLookupTableAccount,
MessageV0,
PublicKey,
Signer,
SystemProgram,
TransactionInstruction,
VersionedTransaction,
} from '@solana/web3.js';
import BN from 'bn.js';
import { Bank } from './accounts/bank';
import { I80F48 } from './numbers/I80F48';
import { ASSOCIATED_TOKEN_PROGRAM_ID, TOKEN_PROGRAM_ID } from './utils/spl';
///
/// numeric helpers
///
export const U64_MAX_BN = new BN('18446744073709551615');
export const I64_MAX_BN = new BN('9223372036854775807').toTwos(64);
export function bpsToDecimal(bps: number): number {
return bps / 10000;
}
export function percentageToDecimal(percentage: number): number {
return percentage / 100;
}
export function toNativeI80F48ForQuote(uiAmount: number): I80F48 {
return I80F48.fromNumber(uiAmount * Math.pow(10, 6));
}
export function toNativeI80F48(uiAmount: number, decimals: number): I80F48 {
return I80F48.fromNumber(uiAmount * Math.pow(10, decimals));
}
export function toNative(uiAmount: number, decimals: number): BN {
return new BN((uiAmount * Math.pow(10, decimals)).toFixed(0));
}
export function toNativeSellPerBuyTokenPrice(
price: number,
sellBank: Bank,
buyBank: Bank,
): number {
return price * Math.pow(10, sellBank.mintDecimals - buyBank.mintDecimals);
}
export function toUiSellPerBuyTokenPrice(
price: number,
sellBank: Bank,
buyBank: Bank,
): number {
return toUiDecimals(price, sellBank.mintDecimals - buyBank.mintDecimals);
}
export function toUiDecimals(
nativeAmount: BN | I80F48 | number,
decimals: number,
): number {
// TODO: remove BN and upgrade to bigint https://github.com/solana-labs/solana/issues/27440
if (nativeAmount instanceof BN) {
nativeAmount = I80F48.fromU64(nativeAmount);
}
if (nativeAmount instanceof I80F48) {
return nativeAmount
.div(I80F48.fromNumber(Math.pow(10, decimals)))
.toNumber();
}
return nativeAmount / Math.pow(10, decimals);
}
export const QUOTE_DECIMALS = 6;
export function toUiDecimalsForQuote(
nativeAmount: BN | I80F48 | number,
): number {
return toUiDecimals(nativeAmount, QUOTE_DECIMALS);
}
export function toUiI80F48(nativeAmount: I80F48, decimals: number): I80F48 {
return nativeAmount.div(I80F48.fromNumber(Math.pow(10, decimals)));
}
export function roundTo5(number): number {
if (number < 1) {
const numString = number.toString();
const nonZeroIndex = numString.search(/[1-9]/);
if (nonZeroIndex === -1 || nonZeroIndex >= numString.length - 5) {
return number;
}
return Number(numString.slice(0, nonZeroIndex + 5));
} else if (number < 10) {
return (
Math.floor(number) +
Number((number % 1).toString().padEnd(10, '0').slice(0, 6))
);
} else if (number < 100) {
return (
Math.floor(number) +
Number((number % 1).toString().padEnd(10, '0').slice(0, 5))
);
} else if (number < 1000) {
return (
Math.floor(number) +
Number((number % 1).toString().padEnd(10, '0').slice(0, 4))
);
} else if (number < 10000) {
return (
Math.floor(number) +
Number((number % 1).toString().padEnd(10, '0').slice(0, 3))
);
}
return Math.round(number);
}
///
export async function buildFetch(): Promise<
(
input: RequestInfo | URL,
init?: RequestInit | undefined,
) => Promise<Response>
> {
let fetch = globalThis?.fetch;
if (!fetch && process?.versions?.node) {
fetch = (await import('node-fetch')).default;
}
return fetch;
}
///
///
/// web3js extensions
///
/**
* Get the address of the associated token account for a given mint and owner
*
* @param mint Token mint account
* @param owner Owner of the new account
* @param allowOwnerOffCurve Allow the owner account to be a PDA (Program Derived Address)
* @param programId SPL Token program account
* @param associatedTokenProgramId SPL Associated Token program account
*
* @return Address of the associated token account
*/
export async function getAssociatedTokenAddress(
mint: PublicKey,
owner: PublicKey,
allowOwnerOffCurve = true,
programId = TOKEN_PROGRAM_ID,
associatedTokenProgramId = ASSOCIATED_TOKEN_PROGRAM_ID,
): Promise<PublicKey> {
if (!allowOwnerOffCurve && !PublicKey.isOnCurve(owner.toBuffer()))
throw new Error('TokenOwnerOffCurve!');
const [address] = await PublicKey.findProgramAddress(
[owner.toBuffer(), programId.toBuffer(), mint.toBuffer()],
associatedTokenProgramId,
);
return address;
}
export async function createAssociatedTokenAccountIdempotentInstruction(
payer: PublicKey,
owner: PublicKey,
mint: PublicKey,
): Promise<TransactionInstruction> {
const account = await getAssociatedTokenAddress(mint, owner);
return new TransactionInstruction({
keys: [
{ pubkey: payer, isSigner: true, isWritable: true },
{ pubkey: account, isSigner: false, isWritable: true },
{ pubkey: owner, isSigner: false, isWritable: false },
{ pubkey: mint, isSigner: false, isWritable: false },
{
pubkey: SystemProgram.programId,
isSigner: false,
isWritable: false,
},
{ pubkey: TOKEN_PROGRAM_ID, isSigner: false, isWritable: false },
],
programId: ASSOCIATED_TOKEN_PROGRAM_ID,
data: Buffer.from([0x1]),
});
}
export async function buildVersionedTx(
provider: AnchorProvider,
ix: TransactionInstruction[],
additionalSigners: Signer[] = [],
alts: AddressLookupTableAccount[] = [],
): Promise<VersionedTransaction> {
const message = MessageV0.compile({
payerKey: (provider as AnchorProvider).wallet.publicKey,
instructions: ix,
recentBlockhash: (await provider.connection.getLatestBlockhash()).blockhash,
addressLookupTableAccounts: alts,
});
const vTx = new VersionedTransaction(message);
vTx.sign([
((provider as AnchorProvider).wallet as any).payer as Signer,
...additionalSigners,
]);
return vTx;
}
///
/// ts extension
///
// https://stackoverflow.com/questions/70261755/user-defined-type-guard-function-and-type-narrowing-to-more-specific-type/70262876#70262876
export declare abstract class As<Tag extends keyof never> {
private static readonly $as$: unique symbol;
private [As.$as$]: Record<Tag, true>;
}