RPC: getLoanInfo (#654)

* rpc function implementation

* add test

* append api md file

* fix interface

* revert indentation changes caused by extra plugin

* fix no longer using dynamic oracle id

* remove jsdoc `see` numbering

* move docs to new structure

* remove old website doc

* skip flaky scrypt difficulty tuning benchmark test

* revert md file auto lint fix

* fix merged md

* revert minor change

* add extra test check collateral and loan usd value
fix syntax based on latest defid/rpc changes

* rework everything for getloaninfo rpc

* revert test skip

* include setGovHeight test and doc

* rename all getloaninfo var to camel case

* add rpc, test, doc

* add invalid activation height test

* remove setGov ORACLE_BLOCK_INTERVAL (consensus no longer allow)

* disable docker pruning

* fix test, %BLOCK_INTERVAL is always zero now

* address few change request

* remove log

Co-authored-by: surangap <[email protected]>

Co-authored-by: surangap <[email protected]>

docs/node/RPC Category/16-loan.md

@@ -188,6 +188,40 @@ interface CollateralTokenDetail {
 }
 ```
 
+## getLoanInfo
+
+Quick access to multiple API with consolidated total collateral and loan value.
+
+```ts title="client.loan.getLoanInfo()"
+interface loan {
+  getLoanInfo (): Promise<GetLoanInfoResult>
+}
+
+interface GetLoanInfoResult {
+  currentPriceBlock: BigNumber
+  nextPriceBlock: BigNumber
+  defaults: LoanConfig
+  totals: LoanSummary
+}
+
+interface LoanConfig {
+  fixedIntervalBlocks: BigNumber
+  maxPriceDeviationPct: BigNumber
+  minOraclesPerPrice: BigNumber
+  scheme: string
+}
+
+interface LoanSummary {
+  collateralTokens: BigNumber
+  collateralValue: BigNumber
+  loanTokens: BigNumber
+  loanValue: BigNumber
+  openAuctions: BigNumber
+  openVaults: BigNumber
+  schemes: BigNumber
+}
+```
+
 ## setLoanToken
 
 Creates (and submits to local node and network) a token for a price feed set in collateral token.