Skip to main content
These utilities help developers inspect onchain state and simulate transactions before sending them. They are useful for debugging failed transactions, verifying protocol state, and building monitoring dashboards.

​
Check Vault State

Inspect the current state of a vault, including token mints, exchange rate, supply, and expiration. 
async function inspectVaultState() {
  await vault.reload();

  console.log("Vault State:");
  console.log(`  Mint SY: ${vault.mintSy.toString()}`);
  console.log(`  Mint PT: ${vault.mintPt.toString()}`);
  console.log(`  Mint YT: ${vault.mintYt.toString()}`);
  console.log(`  Exchange Rate: ${vault.state.lastSeenSyExchangeRate}`);
  console.log(`  PT Supply: ${vault.state.ptSupply.toString()}`);
  console.log(`  YT Supply: ${vault.state.ytSupply.toString()}`);
  console.log(`  Total SY Escrowed: ${vault.state.totalSyInEscrow.toString()}`);
  console.log(`  SY for PT: ${vault.state.syForPt.toString()}`);
  console.log(`  Expiration: ${new Date(vault.state.expirationTs * 1000).toISOString()}`);
}

​
Check Market State

Inspect the CLMM market, including current tick, price, liquidity, and reserves. 
async function inspectMarketState() {
  await market.reload();

  console.log("Market State:");
  console.log(`  Current Tick: ${market.state.currentTick}`);
  console.log(`  Sqrt Price: ${market.state.sqrtPrice.toString()}`);
  console.log(`  Liquidity: ${market.state.liquidity.toString()}`);
  console.log(`  Fee Rate: ${market.state.feeRate}bp`);
  console.log(`  PT Reserve: ${market.state.ptReserve.toString()}`);
  console.log(`  SY Reserve: ${market.state.syReserve.toString()}`);
}

​
Simulate Transaction

Simulate a transaction before sending it to catch errors early and check compute unit consumption. 
async function simulateBeforeSend(ix: TransactionInstruction) {
  const tx = new Transaction().add(ix);
  tx.recentBlockhash = (await connection.getLatestBlockhash()).blockhash;
  tx.feePayer = user;

  const simulation = await connection.simulateTransaction(tx);

  if (simulation.value.err) {
    console.error("Simulation failed:", simulation.value.err);
    console.error("Logs:", simulation.value.logs);
    throw new Error("Transaction would fail");
  }

  console.log("Simulation successful");
  console.log(`  Compute units: ${simulation.value.unitsConsumed}`);

  return simulation;
}

​
Next Steps

SDK Quickstart

Install the SDK and walk through the complete flow

Strip & Merge

Detailed walkthrough of stripping, yield collection, and merging

Trading

Trade PT and YT on the CLMM and Orderbook

Integration Guide

Production-ready examples combining all three SDKs