Merge pull request #6 from swhite24/feature/log-formatting

Feature/log formatting

README.md

@@ -19,6 +19,7 @@ go get github.com/swhite24/cbpro-buy/cmd/cbpro-buy
 - Purchase any product on Coinbase Pro in any currency pair (that's available to your locale / account).
 - Automatically deposit funds to conduct the purchase if your USD / other currency account is unable to fulfill.
 - Automatically wait for deposit to clear before attempting to issue a market buy.
+- Allow for weighing purchases if current price falls below average price over configured amount of time.
 
 ## Usage
 
@@ -44,6 +45,29 @@ Flags:
       --use-basis                  Whether to adjust purchase amount if current price is below average cost over time window
 ```
 
+## Example
+
+```sh
+$ export CBPRO_BUY_SECRET="..."
+$ export CBPRO_BUY_KEY="..."
+$ export CBPRO_BUY_PASSPHRASE="..."
+$ cbpro-buy --amount 10 --autodeposit --use-basis
+Use basis configured. Getting average purchase price over last 30 days.
+Average purchase price: 56580.94
+Current book price: 54953.52
+Current price less than average price.
+Adjusting buy amount from 10.00 to 15.00
+Fetching current funding account status.
+Success.  Available balance: 0.330014
+Available balance is less than requested purchase: 15.00
+Initiating deposit of 15.00 USD
+Waiting for deposit to be available in account.
+Checking available balance: 0.33
+Checking available balance: 15.33
+Initiating purchase of 15.00 USD worth of BTC
+Purchase successful!
+```
+
 ## Lambda Usage
 
 This repo also contains an example deployment using [AWS Lambda](https://aws.amazon.com/lambda/) executed on a schedule to provide a means to "dollar cost average" with scheduled buys regardless of price. This is handled with [terraform](https://www.terraform.io/). See [the terraform directory](terraform) for details.

pkg/purchase/purchase.go

@@ -41,12 +41,12 @@ func (p *purchaser) initiatePurchase() error {
 
 	// Check if current balance is sufficient
 	if initialBalance < p.cfg.Amount {
-		fmt.Printf("Available balance is less than requested purchase: %f\n", p.cfg.Amount)
+		fmt.Printf("Available balance is less than requested purchase: %.2f\n", p.cfg.Amount)
 		if !p.cfg.AutoDeposit {
 			return errors.New("insufficient funds for purchase")
 		}
 		// initiate and wait for deposit
-		fmt.Printf("Initiating deposit of %f %s\n", p.cfg.Amount, p.cfg.Currency)
+		fmt.Printf("Initiating deposit of %.2f %s\n", p.cfg.Amount, p.cfg.Currency)
 		if err = p.deposit(p.cfg.Currency, p.cfg.Amount, p.cfg.UseCoinbase); err != nil {
 			return err
 		}
@@ -66,7 +66,7 @@ func (p *purchaser) initiatePurchase() error {
 					continue
 				}
 
-				fmt.Printf("Checking available balance: %f\n", balance)
+				fmt.Printf("Checking available balance: %.2f\n", balance)
 
 				if balance >= cfg.Amount {
 					ch <- 1
@@ -85,7 +85,7 @@ func (p *purchaser) initiatePurchase() error {
 	}
 
 	// Make purchase
-	fmt.Printf("Initiating purchase of %f %s worth of %s\n", p.cfg.Amount, p.cfg.Currency, p.cfg.Product)
+	fmt.Printf("Initiating purchase of %.2f %s worth of %s\n", p.cfg.Amount, p.cfg.Currency, p.cfg.Product)
 	return p.purchase(p.cfg.Product, p.cfg.Currency, p.cfg.Amount)
 }