Lock token and Oracles split

[jingyi2811]

What would you like to be added:

Add the test units for

1. v0/locks/token/[loan token number] to lock and unlock several Defichain activities
2. v0/oracles/splits/[loan token number] to perform oracles split to double the token quantity in several contexts

setGOV variables.

Why is this needed:

DFI loan token needs to have the capability of token split after Amazon decided to split its share from 1 to 20 on 6 June at 9.30 pm Singapore time. Before splitting happened, the following activities are locked and prevented to be executed by the user, which are:-

• updateToken
• getFixedIntervalPrice
• poolSwap
• futureSwap
• depositToVault (If loan token is a collateral token)
• takeLoan
• withdrawFromVault (If loan token is a collateral token)
• paybackLoan

(Except for updateToken, all the RPCs abovementioned involve oracle pricing)

The lock is not a generic lock function and will be improved over time. Hence, enabling the lock function does not prevent the following activities that do not involve Oracle pricing to be executed, which are:-

• placeautionbid
• withdrawfutureswap
• updateVault
• closeVault
• mintToken

Once the oracle splitting is finished, the lock will be taken away and users can execute all the activities back. Splitting the oracles affects the following Defichain objects, which are:-

• token
• pool
• active and liquidated vault
• auction
• futureswap

Oracle splitting should double the quantity, but reduce the price by 2. The doubling activities happened automatically on the Defichain objects abovementioned, however, the new price (which is divided by 2) will be set manually by the price source (Exchange).

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