add a script to render price impact for scale amount from and to (#539)
Signed-off-by: microwavedcola1 <microwavedcola@gmail.com>
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import { AnchorProvider, Wallet } from '@coral-xyz/anchor';
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import { Connection, Keypair, PublicKey } from '@solana/web3.js';
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import fetch from 'node-fetch';
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import { MangoClient } from '../src/client';
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import { MANGO_V4_ID } from '../src/constants';
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import { toNative, toUiDecimalsForQuote } from '../src/utils';
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const { MB_CLUSTER_URL } = process.env;
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const GROUP_PK = '78b8f4cGCwmZ9ysPFMWLaLTkkaYnUjwMJYStWe5RTSSX';
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async function buildClient(): Promise<MangoClient> {
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const clientKeypair = new Keypair();
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const options = AnchorProvider.defaultOptions();
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const connection = new Connection(MB_CLUSTER_URL!, options);
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const clientWallet = new Wallet(clientKeypair);
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const clientProvider = new AnchorProvider(connection, clientWallet, options);
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return await MangoClient.connect(
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clientProvider,
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'mainnet-beta',
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MANGO_V4_ID['mainnet-beta'],
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{
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idsSource: 'get-program-accounts',
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},
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);
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}
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async function computePriceImpact(
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amount: string,
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inputMint: string,
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outputMint: string,
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): Promise<{ outAmount: number; priceImpactPct: number }> {
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const url = `https://quote-api.jup.ag/v4/quote?inputMint=${inputMint}&outputMint=${outputMint}&amount=${amount}&swapMode=ExactIn&slippageBps=10000&onlyDirectRoutes=false&asLegacyTransaction=false`;
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const response = await fetch(url);
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let res = await response.json();
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res = res.data[0];
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return {
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outAmount: parseFloat(res.outAmount),
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priceImpactPct: parseFloat(res.priceImpactPct),
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};
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}
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async function main() {
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const client = await buildClient();
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const group = await client.getGroup(new PublicKey(GROUP_PK));
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await group.reloadAll(client);
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console.log(
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`${'COIN'.padStart(20)}, ${'Scale'.padStart(8)}, ${'Liq Fee'.padStart(
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6,
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)}, ${'$->coin'.padStart(6)}, ${'coin-$'.padStart(6)}`,
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);
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for (const bank of Array.from(group.banksMapByMint.values())) {
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if (bank[0].name === 'USDC' || bank[0].reduceOnly === true) {
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continue;
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}
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const usdcMint = 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v';
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const pi1 = await computePriceImpact(
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bank[0].depositWeightScaleStartQuote.toString(),
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usdcMint,
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bank[0].mint.toBase58(),
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);
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const inAmount = toNative(
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Math.min(
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Math.floor(
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toUiDecimalsForQuote(bank[0].depositWeightScaleStartQuote) /
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bank[0].uiPrice,
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),
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99999999999,
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),
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bank[0].mintDecimals,
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);
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const pi2 = await computePriceImpact(
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inAmount.toString(),
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bank[0].mint.toBase58(),
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usdcMint,
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);
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console.log(
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`${bank[0].name.padStart(20)}, ${(
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'$' +
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toUiDecimalsForQuote(bank[0].depositWeightScaleStartQuote).toString()
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).padStart(8)}, ${(bank[0].liquidationFee.toNumber() * 100)
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.toFixed(3)
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.padStart(6)}%, ${(pi1.priceImpactPct * 100).toFixed(2)}%, ${(
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pi2.priceImpactPct * 100
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).toFixed(2)}%`,
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);
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}
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}
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main();
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