src/Client.php
public function verifyCallback($body, $signature)
    {
        $signature_buffer = base64_decode( $signature );
        return (1 == openssl_verify($body, $signature_buffer, self::getCallbackPublicKey(), OPENSSL_ALGO_SHA256));
    }
public function verifyCallback($body, $signature)
    {
        $signature_buffer = base64_decode( $signature );
        return (1 == openssl_verify($body, $signature_buffer, self::getCallbackPublicKey(), OPENSSL_ALGO_SHA256));
    }
public function verifyCallback ( $ body , $ signature ) { $ signature_buffer = base64_decode ( $ signature ) ; return ( 1 == openssl_verify ( $ body , $ signature_buffer , self :: getCallbackPublicKey ( ) , OPENSSL_ALGO_SHA256 ) ) ; }
Verifies the authenticity of a merchant callback from Coinbase

@return Boolean
Verifies the authenticity of a merchant callback from Coinbase