Quoting

Quotes are read-only simulations from the v2 backend. They accept symbols or class keys, and an omitted fee compares all available pools (0, 500, 3000, and 10000).

const quote = await gSwap.quoting.quoteExactInput('GALA', 'GUSDC', '100');

console.log(`Tier: ${quote.feeTier}`);
console.log(`Input: ${quote.amountIn}`);
console.log(`Output: ${quote.amountOut}`);
console.log(`Trading fees: ${quote.tradingFees}`);

Use exact output when the received amount is fixed:

const quote = await gSwap.quoting.quoteExactOutput('GALA', 'GUSDC', '50', 3000);
console.log(`Spend at most ${quote.amountIn} GALA for 50 GUSDC`);

The quote includes the selected fee, canonical token0Symbol and token1Symbol, current and post-trade square-root prices, and the protocol, trading, and total fee amounts. It also reports tokenInIsToken0, which is useful when building a lower-level RequestTrade DTO. Prices can change between a quote and a write, so always set a slippage bound on the write and refresh large or delayed quotes.

const quote = await gSwap.quoting.quoteExactInput('GALA', 'GUSDC', '100');
const tx = await gSwap.swaps.swap('GALA', 'GUSDC', quote.feeTier, {
  exactIn: '100',
  amountOutMinimum: quote.amountOut,
});

An exact-input trade uses amountOutMinimum; an exact-output trade uses amountInMaximum. Both values are optional, but omitting them removes slippage protection. A missing pool or insufficient liquidity is reported as an SDK error.