Create Swap Instruction (#30)

* Add swap instruction

* Market signer validation

* Add swap TS function

* fix imports

* remove self trade behavior for swaps

* Update swap instruction with referral fees

* Update bindings

* run `cargo autobindings` & `cargo autodoc`

Co-authored-by: DR497 <47689875+dr497@users.noreply.github.com>

js/src/bindings.ts

@@ -8,6 +8,7 @@ import {
   newOrderInstruction,
   settleInstruction,
   closeAccountInstruction,
+  swapInstruction,
 } from "./raw_instructions";
 import { OrderType, PrimedTransaction, Side } from "./types";
 import * as aaob from "@bonfida/aaob";
@@ -290,3 +291,54 @@ export const closeAccount = async (market: PublicKey, owner: PublicKey) => {
 
   return instruction;
 };
+
+export const swap = async (
+  market: Market,
+  side: Side,
+  minOutputQuantity: number,
+  inputQuantity: number,
+  selfTradeBehaviour: SelfTradeBehavior,
+  ownerBaseTokenAccount: PublicKey,
+  ownerQuoteTokenAccount: PublicKey,
+  owner: PublicKey,
+  discountTokenAccount?: PublicKey,
+  referralFeeAccount?: PublicKey,
+) => {
+  // Market signer
+  const [marketSigner] = await PublicKey.findProgramAddress(
+    [market.address.toBuffer()],
+    DEX_ID
+  );
+
+  // Uncomment for mainnet
+  // if (!discountTokenAccount) {
+  //   discountTokenAccount = await findAssociatedTokenAddress(owner, SRM_MINT);
+  // }
+
+  const instruction = new swapInstruction({
+    side: side as number,
+    baseQty: side === Side.Bid ? minOutputQuantity : inputQuantity,
+    quoteQty: side === Side.Bid ? inputQuantity : minOutputQuantity,
+    matchLimit: new BN(Number.MAX_SAFE_INTEGER), // TODO Change
+    hasDiscountTokenAccount: discountTokenAccount !== undefined,
+  }).getInstruction(
+    DEX_ID,
+    TOKEN_PROGRAM_ID,
+    SystemProgram.programId,
+    market.address,
+    market.orderbookAddress,
+    market.eventQueueAddress,
+    market.bidsAddress,
+    market.asksAddress,
+    market.baseVault,
+    market.quoteVault,
+    marketSigner,
+    ownerBaseTokenAccount,
+    ownerQuoteTokenAccount,
+    owner,
+    discountTokenAccount,
+    referralFeeAccount,
+  );
+
+  return instruction;
+};