Assets #1 Create base code for Asset issuance and update transactions:

[Bigpiggy01]

Transaction types:

• new_asset: this transaction type is used when a new asset name is registered

• update_asset: this transaction type is used when updating an existing asset.

1. Transaction extraPayload: transaction extra payload will be used to store asset metadata

2. new_asset extraPayload structure:

• Name: 1-100 chars [a-zA-Z0-9] and space
• updatable: bool - if true this asset meta can be modify using assetTx update process. Otherwise these asset meta can’t be updated
• Decimal point: has to be 0 if identities as not empty.
• referenceHash: hash of the underlying physical or digital assets, IPFS hash can be used here.

Above must attach and store on new Asset index in the database. Which is to be created as part of this task!

As well as come with applicable unit tests.

NOTE Asset related code preferably written in sequence of the "Asset #x" in the issue title.