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-rw-r--r--exchange.go8
1 files changed, 7 insertions, 1 deletions
diff --git a/exchange.go b/exchange.go
index 49f0a2f..3b45d0d 100644
--- a/exchange.go
+++ b/exchange.go
@@ -1,4 +1,10 @@
-// TODO
+// Package exchange retrieves fiat- and crypto-currency exchange rates from [CoinMarketCap].
+//
+// Features:
+// - Cache ([ttlcache])
+// - Fixed-point numbers ([decimal])
+//
+// [CoinMarketCap]: https://coinmarketcap.com/api/documentation/
package exchange
import (