The requested package bitpay/php-client No version set (parsed as 1.0.0) could not be found.

[mosvict]

I need to help me.

OS: Ubuntu16

Problem 1

• The requested package bitpay/php-client No version set (parsed as 1.0.0) could not be found. Problem 2
• The requested PHP extension ext-bcmath * is missing from your system. Install or enable PHP's bcmath extension. Problem 3
• The requested PHP extension ext-curl * is missing from your system. Install or enable PHP's curl extension. Problem 4
• Installation request for satooshi/php-coveralls ~0.6.1 -> satisfiable by satooshi/php-coveralls[v0.6.1].
• satooshi/php-coveralls v0.6.1 requires ext-curl * -> the requested PHP extension curl is missing from your system. Problem 5
• bitpay/php-client v2.2.19 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
• bitpay/php-client v2.2.18 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
• bitpay/php-client v2.2.17 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
• bitpay/php-client v2.2.16 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
• bitpay/php-client v2.2.15 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
• bitpay/php-client v2.2.14 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
• bitpay/php-client v2.2.13 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.
• bitpay/php-client v2.2.12 requires ext-bcmath * -> the requested PHP extension bcmath is missing from your system.