[Copilot]

Adds Swiss Franc (CHF) as a selectable fiat currency alongside existing EUR and USD options.

Changes

• Type definitions: Added CHF to Fiats and Unit enums
• Price feed: Extended FiatPrices interface and getPriceFeed to fetch CHF rates from blockchain.info API
• Currency conversion: Implemented fromCHF/toCHF functions in fiat provider with conditional logic in fromFiat/toFiat
• Settings UI: Added CHF to currency selector dropdown
• Tests: Updated mock API responses to include CHF data

The implementation follows the existing EUR/USD pattern:

// Conversion functions now handle three currencies
const fromFiat = (fiat = 0) => {
  if (config.fiat === Fiats.EUR) return fromEUR(fiat)
  if (config.fiat === Fiats.CHF) return fromCHF(fiat)
  return fromUSD(fiat)
}

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• blockchain.info
  • Triggering command: /usr/bin/curl curl -s REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Add CHF as currency fiat

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