# TransactionRequestPriorityFee
## Enum Variants
| String | **For Ethereum-based blockchains only.** The fee (in Gwei) for EIP-1559 transaction pricing mechanism. Note: - Fireblocks recommends using a numeric string for more precision. Although a number input exists, it is deprecated. |
| f64 | **For Ethereum-based blockchains only.** The fee (in Gwei) for EIP-1559 transaction pricing mechanism. Note: - Fireblocks recommends using a numeric string for more precision. Although a number input exists, it is deprecated. |
[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)