Guides-Ledger and Off-chain-How to support FIAT currencies

Number of APIs: 4

1. 1. Creating a virtual currency POST {{baseUrl}}/v3/ledger/virtualCurrency

2. 3. Destroying the supply of a virtual currency PUT {{baseUrl}}/v3/ledger/virtualCurrency/revoke

3. 2. Increasing the supply of a virtual currency PUT {{baseUrl}}/v3/ledger/virtualCurrency/mint

4. 4. Listing account transactions POST {{baseUrl}}/v3/ledger/transaction/account?pageSize=20