> For the complete documentation index, see [llms.txt](https://max-daunarovich.gitbook.io/flow-network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://max-daunarovich.gitbook.io/flow-network/introduction/events/transactions/transaction-parameters.md).

# Transaction Parameters

Transactions may declare parameters. Transaction parameters are declared like function parameters. The arguments for the transaction are passed in the sent transaction.

Transaction parameters are accessible in all phases.

```
// Declare a transaction which has one parameter named `amount`
// that has the type `UFix64`
//
transaction(amount: UFix64) {

}
```