# Fees ```ts import { Fee } from '@terra-money/terra.js'; const msgs = [ new MsgSend( ... ), new MsgSwap( ... ), ]; // messages const fee = new Fee(50000, { uluna: 4500000 }); const tx = await wallet.createAndSignTx({ msgs, fee }); ``` ## Automatic fee estimation If you don't specify a fee when you create your transaction, it will automatically be estimated by simulating it within the node. ```ts const tx = await wallet.createAndSignTx({ msgs }); ``` You can define the fee estimation parameters when you create your `LCDClient` instance. The defaults are: ```ts const terra = new LCDClient({ URL: 'https://lcd.terra.dev', chainID: 'columbus-5', gasPrices: { uluna: 0.015 }, gasAdjustment: 1.4 }); ``` You can override these settings by passing the fee estimation parameters in `wallet.createTx` or `wallet.createAndSignTx`: ```ts const tx = await wallet.createAndSignTx({ msgs, gasPrices: { ukrw: 0.01 }, gasAdjustment: 1.9 }); ```