49 lines
1.2 KiB
TypeScript
49 lines
1.2 KiB
TypeScript
import { PublicKey } from '@solana/web3.js';
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import { getLayoutVersion } from './tokens_and_markets';
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export function supportsSrmFeeDiscounts(programId: PublicKey) {
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return getLayoutVersion(programId) > 1;
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}
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export function getFeeRates(feeTier: number): { taker: number; maker: number } {
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if (feeTier === 1) {
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// SRM2
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return { taker: 0.002, maker: -0.0003 };
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} else if (feeTier === 2) {
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// SRM3
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return { taker: 0.0018, maker: -0.0003 };
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} else if (feeTier === 3) {
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// SRM4
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return { taker: 0.0016, maker: -0.0003 };
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} else if (feeTier === 4) {
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// SRM5
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return { taker: 0.0014, maker: -0.0003 };
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} else if (feeTier === 5) {
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// SRM6
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return { taker: 0.0012, maker: -0.0003 };
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} else if (feeTier === 6) {
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// MSRM
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return { taker: 0.001, maker: -0.0005 };
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}
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// Base
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return { taker: 0.0022, maker: -0.0003 };
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}
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export function getFeeTier(msrmBalance: number, srmBalance: number): number {
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if (msrmBalance >= 1) {
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return 6;
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} else if (srmBalance >= 1_000_000) {
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return 5;
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} else if (srmBalance >= 100_000) {
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return 4;
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} else if (srmBalance >= 10_000) {
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return 3;
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} else if (srmBalance >= 1_000) {
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return 2;
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} else if (srmBalance >= 100) {
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return 1;
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} else {
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return 0;
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}
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}
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