@p2p-protocol/sdk

TypeScript SDK for the P2P Limit Order Protocol — a fully on-chain, peer-to-peer orderbook DEX on Solana.

Status: Live on Solana Devnet · Mainnet launch pending audit

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Install

npm install @p2p-protocol/sdk

Program

Network	Program ID
Devnet	HazZUxenwxgxDumK5rt89mhXfffnVpA7Nyvx87kMts18

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Quick start

Create a market

import { Connection, Transaction, sendAndConfirmTransaction } from "@solana/web3.js";
import BN from "bn.js";
import {
  createMarketInstruction,
  findMarketAddress,
  findBaseVaultAddress,
  findQuoteVaultAddress,
} from "@p2p-protocol/sdk";

const conn = new Connection("https://api.devnet.solana.com");

const [market]     = await findMarketAddress(baseMint, quoteMint);
const [baseVault]  = await findBaseVaultAddress(market);
const [quoteVault] = await findQuoteVaultAddress(market);

const ix = createMarketInstruction({
  payer:     payer.publicKey,
  baseMint,
  quoteMint,
  tickSize:  new BN(1_000),      // raw quote units per tick
  lotSize:   new BN(1_000_000),  // raw base units per lot
  feeBps:    20,                 // 0.20%
});

await sendAndConfirmTransaction(conn, new Transaction().add(ix), [payer]);

Place an order

import { placeOrderInstruction, findOrderAddress, Side, OrderType } from "@p2p-protocol/sdk";

const orderId = new BN(Date.now());
const [orderPda] = await findOrderAddress(market, maker.publicKey, orderId);

const ix = placeOrderInstruction({
  owner:      maker.publicKey,
  market,
  orderId,
  side:       Side.Ask,           // selling base token
  orderType:  OrderType.Limit,
  price:      new BN(100_000),    // ticks
  qty:        new BN(10),         // lots
  expiry:     new BN(0),          // 0 = no expiry
  ownerToken: makerBaseAta,       // debited at placement
});

await sendAndConfirmTransaction(conn, new Transaction().add(ix), [maker]);

Fill an order

import { fillOrderInstruction } from "@p2p-protocol/sdk";

const ix = fillOrderInstruction({
  taker:         taker.publicKey,
  order:         orderPda,
  market,
  fillQty:       new BN(5),
  takerBaseAta,
  takerQuoteAta,
  makerBaseAta,
  makerQuoteAta,
});

await sendAndConfirmTransaction(conn, new Transaction().add(ix), [taker]);

Cancel an order

import { cancelOrderInstruction } from "@p2p-protocol/sdk";

const ix = cancelOrderInstruction({
  owner:      maker.publicKey,
  order:      orderPda,
  market,
  ownerToken: makerBaseAta,
});

await sendAndConfirmTransaction(conn, new Transaction().add(ix), [maker]);

Fetch & deserialize accounts

import { fetchMarket, fetchOrder, remainingQty, isExpired } from "@p2p-protocol/sdk";

const market = await fetchMarket(conn, marketPda);
console.log("tick size:", market.tickSize.toString());

const order = await fetchOrder(conn, orderPda);
console.log("remaining:", remainingQty(order).toString(), "lots");
console.log("expired:  ", isExpired(order, Date.now() / 1000));

Decode events

import { parseEventsFromLogs } from "@p2p-protocol/sdk";

const tx = await conn.getTransaction(sig, { commitment: "confirmed" });
const events = parseEventsFromLogs(tx.meta.logMessages ?? []);

for (const evt of events) {
  if (evt.type === "OrderFilled") {
    console.log("fill price:", evt.fillPrice.toString());
    console.log("fill qty:  ", evt.fillQty.toString());
  }
}

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API reference

PDA helpers

Function	Seeds
findMarketAddress(baseMint, quoteMint)	["market", baseMint, quoteMint]
findBaseVaultAddress(market)	["vault", market, "base"]
findQuoteVaultAddress(market)	["vault", market, "quote"]
findOrderAddress(market, owner, orderId)	["order", market, owner, orderId_le8]

Instruction builders

Function	Description
createMarketInstruction(params)	Create a new market with base/quote mint pair
placeOrderInstruction(params)	Place a limit/IOC/FOK/post-only order
fillOrderInstruction(params)	Fill (partially or fully) a resting order
cancelOrderInstruction(params)	Cancel an order and reclaim escrowed tokens
expireOrderInstruction(params)	Expire a stale order (callable by anyone)

Enums

enum Side      { Bid = 0, Ask = 1 }
enum OrderType { Limit = 0, IOC = 1, FOK = 2, PostOnly = 3 }

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Order mechanics

Escrow at placement:

• Bid: locks qty × price × tickSize quote tokens in quoteVault
• Ask: locks qty × lotSize base tokens in baseVault

At fill:

• Maker and taker atomically swap through the vault PDAs
• Vault authority = market PDA (signed on-chain with stored bump)

Order types (IOC/FOK/PostOnly semantics enforced by off-chain router):

• Limit — rests in the book until filled, cancelled, or expired
• IOC — fill what's available, cancel the rest immediately
• FOK — fill entirely or cancel entirely
• PostOnly — rejected if it would immediately cross

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Author

Built by Rohiteswar Velagapudi

License

MIT