# GetSpendableBalanceInput

Input for querying spendable wallet balance.

**wallet**stringrequired

Wallet address to inspect.

**token**stringrequired

Token identifier to get the balance for, e.g. `BITCOIN-BTC` or `STARKNET-STRK`.

**targetChain**string

Target smart-chain identifier when estimating spendable Bitcoin balance. The estimate adjusts automatically based on the available swap routes between Bitcoin and the provided chain.

**gasDrop**boolean

Whether gas-drop transaction size overhead should be included for Bitcoin-to-smart-chain swaps.

**feeRate** <!-- -->object

Manual fee-rate override used for spendable balance estimation. For Bitcoin balances this should be a positive numeric fee rate in sats/vB. For smart-chain balances the format is chain-specific: Solana uses `<microLamports/CU>[;<base fee in lamports>]`, Starknet uses `<l1GasCost>,<l2GasCost>,<l1DataGasCost>;v3` where all fee amounts are in Fri per gas, and EVM chains use `<baseFeePerGas>,<priorityFeePerGas>` where both values are in Wei per gas.

oneOf

* number
* string
* string
* string

****number

For Bitcoin balances: positive fee rate in sats/vB.

**Possible values:** `> 0`

**Example:<!-- -->&#x20;**`3.5`

**minBitcoinFeeRate**number

Minimum Bitcoin fee rate to enforce during estimation.

**feeMultiplier**number

Multiplier applied when `feeRate` is not provided. For Bitcoin balances it multiplies the fetched economical Bitcoin fee rate. For smart-chain balances it multiplies the smart-chain native-token commit fee estimate. This parameter cannot be specified alongside `feeRate`.

GetSpendableBalanceInput

```
{

  "wallet": "string",

  "token": "string",

  "targetChain": "string",

  "gasDrop": true,

  "feeRate": 3.5,

  "minBitcoinFeeRate": 0,

  "feeMultiplier": 0

}
```