Change Details

These exist in Cashtab. Currently any app that wants to accept or cancel utxos needs to do this. `ecash-agora` does expose helpful methods for getting the fee. But, we might as well have this too, esp since `chronik-client` is already a dependency and the utxos are themselves strongly typed. These functions and tests are copied from Cashtab.

`ecash-agora` exports helpful methods for getting the tx fee for accept or cancel txs. Also the `AgoraOffer` object has methods to accept or cancel. However, these methods require fuel utxos. Right now, it's on the app dev to get those utxos. These functions belong in the libray, since - `chronik-client` is already a dependency of `ecash-agora` - utxos are typed, so we can expect app devs to be working with `chronik-client` utxos - they are specifically used for accepting or canceling agora txs Move functions and tests from Cashtab to `ecash-agora` lib. Export from the lib and implement in Cashtab to show they still work as expected.

These exist in Cashtab.`ecash-agora` exports helpful methods for getting the tx fee for accept or cancel txs. Also the `AgoraOffer` object has methods to accept or cancel. However, Currently any app that wants to accept or cancthese methods require fuel utxos needs to do thisos. `ecash-agora` does expose helpful methods for getting the fee.Right now, Butit's on the app dev to get those utxos. These functions belong in the libray, we might as well have this toosince - `chronik-client` is already a dependency of `ecash-agora` - utxos are typed, esp since `chronik-client` is already a dependency and the utxos are themselves strongly typed.so we can expect app devs to be working with `chronik-client` utxos - they are specifically used for accepting or canceling agora txs These functions and tests are copied from CashtabMove functions and tests from Cashtab to `ecash-agora` lib. Export from the lib and implement in Cashtab to show they still work as expected.