Function buildHandlerUrl

buildHandlerUrl(
target: string | HandlerTarget,
values: HandlerEntityValues,
): string | undefined
Expand a handler URL template by substituting its <bech32> / <raw> placeholders.

Returns undefined when the template requires a placeholder you didn't supply (e.g. it contains <bech32> but values.bech32 is missing) — so a caller can fall through to the next target instead of producing a broken URL.
Parameters
- target: string | HandlerTarget
  A HandlerTarget or a raw template string
- values: HandlerEntityValues
  The <bech32> / <raw> substitutions
Returns string | undefined
The expanded URL, or undefined if a needed placeholder is absent
Example
```
buildHandlerUrl({ url: 'https://app/e/<bech32>', entity: 'nevent' }, { bech32: 'nevent1…' });
// 'https://app/e/nevent1…'
```
- Defined in packages/nip/src/89/index.ts:162