fix fiat conversion - requires cg api key

providers/bitcoin/README.md

@@ -6,3 +6,4 @@ A provider for bitcoin, backed by blockstream.info to query address balance and
 
 * *bitcoin_address_[0...]* - A series of bitcoin addresses with a suffix of _0 and each additional address counting up.
 * *bitcoin_ynab_account* - The YNAB account ID used to keep track of Bitcoin balance
+* *bitcoin_coingecko_api_key* - Required for fiat conversion, your addresses nor balances are not transmitted. Docs: https://docs.coingecko.com/reference/setting-up-your-api-key

providers/bitcoin/client.go

@@ -17,6 +17,7 @@ const apiBaseURL = "https://blockstream.info/api/"
 type client struct {
 	httpClient      *http.Client
 	transport       *http.Transport
+	coinGeckoApiKey string
 }
 
 // Send an HTTP GET request, and return the processed response
@@ -61,7 +62,7 @@ func (c *client) processResponse(res *http.Response, out interface{}) error {
 }
 
 // newClient is the factory function for clients
-func newClient() (*client, error) {
+func newClient(coinGeckoApiKey string) *client {
 	transport := &http.Transport{
 		ResponseHeaderTimeout: 5 * time.Second,
 	}
@@ -74,6 +75,7 @@ func newClient() (*client, error) {
 	c := &client{
 		httpClient:      httpClient,
 		transport:       transport,
+		coinGeckoApiKey: coinGeckoApiKey,
 	}
-	return c, nil
+	return c
 }

providers/bitcoin/fiat.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 )
 
-const fiatConvertURL = "https://api.coingecko.com/api/v3/coins/bitcoin?localization=false&tickers=false&market_data=true&community_data=false&developer_data=false&sparkline=false"
+const fiatConvertURL = "https://pro-api.coingecko.com/api/v3/coins/bitcoin?localization=false&tickers=false&market_data=true&community_data=false&developer_data=false&sparkline=false"
 
 type coinGeckoResponse struct {
 	MarketData struct {
@@ -18,7 +18,7 @@ type coinGeckoResponse struct {
 func (c *client) convertBTCToCAD(amount int) (int, error) {
 	coinGeckoData := &coinGeckoResponse{}
 
-	req, err := http.NewRequest("GET", fiatConvertURL, nil)
+	req, err := http.NewRequest("GET", fmt.Sprintf("%s&x_cg_pro_api_key=%s", fiatConvertURL, c.coinGeckoApiKey), nil)
 	if err != nil {
 		return 0, fmt.Errorf("failed to create new GET request: %v", err)
 	}

providers/bitcoin/providerImpl.go

@@ -14,14 +14,12 @@ type Provider struct {
 }
 
 func (p *Provider) Name() string {
-	return "Bitcoin - Blockstream.info"
+	return "Bitcoin - Blockstream.info / CoinGecko"
 }
 
 // Configures the provider for usage via environment variables and persistentData
 // If an error is returned, the provider will not be used
 func (p *Provider) Configure() error {
-	var err error
-
 	// Load environment variables in continous series with suffix starting at 0
 	// Multiple addresses can be configured, (eg _1, _2)
 	// As soon as the series is interrupted, we assume we're done
@@ -39,10 +37,7 @@ func (p *Provider) Configure() error {
 	p.ynabAccountID = os.Getenv("bitcoin_ynab_account")
 
 	// Create new HTTP client
-	p.client, err = newClient()
+	p.client = newClient(os.Getenv("bitcoin_coingecko_api_key"))
-	if err != nil {
-		return fmt.Errorf("failed to create new bitcoin client: %v", err)
-	}
 	return nil
 }