Integrated coin payments on the website

Currently I need to integrate a coin payments my website. The coins need to integrate BTC, BHC, ETH ... The contents of the integration include: 1. Read and learn about integrated API offerings such as [login to view URL], blockcypher.com. 2. Write functions that work with the APIs that the sources provided in step 1 support. 3. Add the functions written in step 2 to the website. => Need to write carefully, ensure the management of errors arise, there are logs system to check back later. Meet the many users. Required language: .NET or Node JS.