Writing and deploying the DocsApp chaincode

Now that our network is online, the next step we need to do is write and deploy our chaincode contract. The chaincode DocsApp consists of the following methods:

• addDocHash: This method adds a new document hash to the blockchain. Document hashes are indexed by the hash of the file path.
• addParamHash: This method adds the FTH and the MTH to the blockchain indexed by a timestamp. The timestamp indicates the time at which the FTH and MTH were calculated and stored to the blockchain.
• queryDocHash: This method retrieves the last updated hash for a document using the hash of the file path.
• queryParamHash: This method retrieves the FTH and the MTH stored in the blockchain at a particular time using the timestamp indicating the time that it was stored.

We'll also have to install the chaincode for all the nodes that are part of our network...