You can supply an object of parameters listed below:

Parameter	Description	Required	Example
items	An array of objects representing orders to be purchased. Refer to the the execute buy api for a full list of parameters	`true`	`[{ token: "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d:1" }]`
wallet	A valid WalletClient from viem or a ReservoirWallet generated from an adapter. Learn more about adapters.	`true`	Refer to viem's documentation onWallet Clients
onProgress	Callback to update UI state as execution progresses. Can also be used to get the transaction hash for a given step item.	`true`	`(steps) => { console.log(steps) }`
expectedPrice	Token price data used to protect buyer from price moves. Pass an object where the keys represent the currency and the value details the amount or/and raw amount with currency details. The raw amount will be more precise.	`false`	`{ "0x0000000000000000000000000000000000000000": { amount: 10, raw: 10000000000000000000 currencyAddress: "0x0000000000000000000000000000000000000000", currencyDecimals: 18 } }`
options	Supports all of the parameters allowed in the execute buy api	`false`	{ source: "reservoir.market", skipBalanceCheck: true ... }
chainId	Override the current active chain	`false`	1
precheck	A boolean indicating whether to just get back the steps/path and not to execute them. This is useful for checking if marketplace approval is required before iterating over the steps.	`false`	`false`
gas	String of the gas provided for the transaction execution. Unused gas will be returned.	`false`	"1000000000000000"

Example

import { getClient, Execute } from "@reservoir0x/reservoir-sdk";
import { createWalletClient, http } from 'viem'

...

address = "0x8ba1f109551bD432803012645Ac136ddd6000000"
wallet = createWalletClient({
  account: address,
  transport: http()
})

getClient()?.actions.buyToken({
  items: [{ token: "0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d:1", quantity: 1 }],
  wallet,
  onProgress: (steps: Execute['steps']) => {
    console.log(steps)
  }
})

Notes

expectedPrice - A feature that protects the buyer when the price changes drastically in a less desirable direction. There’s a small threshold in which it’s ok for it to go up but once it’s crossed the SDK prevents the transaction from being submitted. This check is hardcoded into the SDK and occurs before the transaction hits the blockchain. The price is not inclusive of fees. To get the price you can use the tokens api or the useTokens hook.