Extract rust snippets and reference them

snippets/rust/src/fiat_currencies.rs

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+use std::collections::HashMap;
+use std::sync::Arc;
+
+use anyhow::Result;
+use breez_sdk_core::*;
+
+async fn list_supported_fiat_currencies(sdk: Arc<BreezServices>) -> Result<()> {
+    let supported_fiat_currencies = sdk.list_fiat_currencies().await?;
+
+    Ok(())
+}
+
+async fn get_current_rates(sdk: Arc<BreezServices>) -> Result<()> {
+    let fiat_rates = sdk.fetch_fiat_rates().await?;
+
+    Ok(())
+}
+
+async fn get_fiat_currencies_and_rates(sdk: Arc<BreezServices>) -> Result<Vec<(FiatCurrency, Rate)>> {
+    let supported_fiat_currencies = sdk.list_fiat_currencies().await?;
+    let fiat_rates = sdk.fetch_fiat_rates().await?;
+
+    let mut rates_map : HashMap<String, Rate> = HashMap::new();
+    for rate in fiat_rates {
+        rates_map.insert(rate.coin.to_string().to_lowercase(), rate);
+    }
+
+    let mut sorted = supported_fiat_currencies.clone();
+    sorted.sort_by_key(|f| f.info.name);
+
+    let mut result : Vec<(FiatCurrency, Rate)> = Vec::new();
+    for currency in sorted {
+        let rate = rates_map.get(&currency.id.to_lowercase());
+        if let Some(rate) = rate.cloned() {
+            result.push((currency, rate));
+        }
+    }
+
+    Ok(result)
+}