To configure the payment method Braintree, you should get merchant ID, public key and private key of Braintree. To do this, follow the steps below.

1 – Login to Braintree Dashboard.

2- In the top menu of the dashboard, click on Settings->API Keys

3 – If you have not yet generated API keys, click on the button Generate a new API key

You will be able to see a list of API keys to use,

4 – Copy the public key and add the key in Configuration->Settings->Payment Gateways->Braintree

5 – Copy the private key (click on VIEW to see the private key) and add the key in Configuration->Settings->Payment gateways->Braintree

6. Scroll down and find your merchant ID and add Merchant ID in Setup->Settings->Payment Gateways->Braintree