# Get fees information

#### `sdk.transaction.getFee(opts)`

If you wish to get estimate fee information for a transfer of the native token like ether, the parameters type, from, destination and amount should be passed as follows:

* `opts.type` (string)(**required**) - type of the transaction. It should be `TRANSFER` in this case.
* `opts.from` (string)(**required**) - origin or signing address.
* `opts.destination` (string)(**required**) - destination address.
* `opts.protocol` (string)(**required**) - blockchain protocol.

For smart contract method calls, just pass with the additional parameters:

* `opts.type` (string)(**required**) - type of the transaction. It should be `CALL_CONTRACT_METHOD` in this case.
* `opts.from` (string)(**required**) - origin or signing address.
* `opts.contractAddress` (string)(**required**) - contract address.
* `opts.contractAbi` (array)(**required**) - method ABI to be used.
* `opts.method` (string)(**required**) - method name.
* `opts.params` (array) - method parameters.
* `opts.protocol` (string)(**required**) - blockchain protocol.

And for smart contract deployments:

* `opts.type` (string)(**required**) - type of the transaction. It should be `DEPLOY_CONTRACT` in this case.
* `opts.from` (string)(**required**) - origin or signing address.
* `opts.contractName` (string)(**required**) - contract name.
* `opts.source` (string)(**required**) - contract source code.
* `opts.params` (array) - contract constructor parameters.
* `opts.protocol` (string)(**required**) - blockchain protocol.

```javascript
const fee = await sdk.transaction.getFee({
  type: 'TRANSFER',
  from: '0xaaaaaa',
  destination: '0xbbbbbbbb',
  protocol: 'POLYGON',
})
// Fee information object
// {
//   "chainId": 137,
//   "estimateValue": "0.000021",
//   "unit": "wei",
//   "gas": 21000,
//   "gasPrice": "1000000000"
// }
```


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