FuelConnectorSendTxParams: {
    onBeforeSend?: ((txRequest: TransactionRequest) => Promise<TransactionRequest>);
    provider?: {
        cache?: ProviderCacheJson;
        url: string;
    };
    skipCustomFee?: boolean;
    transactionState?: TransactionStateFlag["state"];
    transactionSummary?: TransactionSummaryJson;
}

Params for the sendTransaction method (for connectors).