fix lint

internal/exchangerates/coingecko.go

@@ -12,7 +12,7 @@ import (
 )
 
 const (
-	// CoinGeckoPair is the ID of Siacoin in CoinGecko
+	// CoinGeckoSicaoinPair is the ID of Siacoin in CoinGecko
 	CoinGeckoSicaoinPair = "siacoin"
 )
 
@@ -67,6 +67,7 @@ type coinGecko struct {
 	err  error
 }
 
+// NewCoinGecko returns an ExchangeRateSource that gets data from CoinGecko.
 func NewCoinGecko(apiKey string, pair string, refresh time.Duration) ExchangeRateSource {
 	return &coinGecko{
 		pair:    pair,

internal/exchangerates/exchangerates.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 )
 
+// An ExchangeRateSource returns the price of 1 unit of an asset in USD.
 type ExchangeRateSource interface {
 	Last() (float64, error)
 	Start(ctx context.Context)
@@ -15,6 +16,8 @@ type averager struct {
 	sources       []ExchangeRateSource
 }
 
+// NewAverager returns an exchange rate source that averages multiple exchange
+// rates.
 func NewAverager(ignoreOnError bool, sources ...ExchangeRateSource) ExchangeRateSource {
 	return &averager{
 		ignoreOnError: ignoreOnError,

internal/exchangerates/kraken.go

@@ -75,6 +75,7 @@ type kraken struct {
 	err  error
 }
 
+// NewKraken returns an ExchangeRateSource that gets data from Kraken.
 func NewKraken(pair string, refresh time.Duration) ExchangeRateSource {
 	return &kraken{
 		pair:    pair,