make private if not part of provider interface

providers/bitcoin/address.go

@@ -25,7 +25,7 @@ type Address struct {
 
 // GetAddress returns an Address struct populated with data from blockstream.info
 // for a given BTC address
-func (c *client) GetAddress(address string) (*Address, error) {
+func (c *client) getAddress(address string) (*Address, error) {
 	addressResponse := &Address{}
 
 	err := c.get(fmt.Sprintf("address/%s", address), addressResponse, url.Values{})

providers/bitcoin/providerImpl.go

@@ -51,7 +51,7 @@ func (p *Provider) GetBalances() ([]int, []string, error) {
 	ynabAccountIDs := make([]string, 0)
 	var satoshiBalance int
 	for _, bitcoinAddress := range p.bitcoinAddresses {
-		addressResponse, err := p.client.GetAddress(bitcoinAddress)
+		addressResponse, err := p.client.getAddress(bitcoinAddress)
 		if err != nil {
 			return balances, ynabAccountIDs, fmt.Errorf("failed to get bitcoin address '%s': %v", bitcoinAddress, err)
 		}