API Reference

This page lists the APIs that are accessible to NUTS Platform users. For more information about the APIs that are used inside NUTS Platform or used only by NUTS Platform owner, please refer to the NUTS Platform smart contracts.

InstrumentRegistry

activateInstrument()

A public function for FSPs to activate new financial instruments in NUTS Platform.

Parameters

Type	Name	Description
address	instrumentAddress	The address of the deployed financial instrument contract. A financial instrument contract can be shared by multiple activated financial instruments.
bytes	instrumentParameters	Custom parameters about the instrument.

Return Values

Type	Name	Description
uint256	instrumentId	ID of the activated financial instrument.

lookupInstrumentManager()

A public function to query Instrument Manager contract address with Instrument ID.

Parameters

Type	Name	Description
uint256	instrumentId	ID of the activated financial instrument.

Return Values

Type	Name	Description
address	instrumentManagerAddress	Address of the Instrument Manager Contract.

InstrumentManager

getInstrumentEscrowAddress()

Get the address of the Instrument Escrow owned by the current Instrument Manager.

Parameters

None

Return Values

Type	Name	Description
address	instrumentEscrowAddress	Address of the Instrument Escrow owned by the current Instrument Manager.

deactivate()

Deactivate the activated financial instrument managed by the current Instrument Manager. Once deactivated, the financial instrument cannot create new issuance, but the existing issuances are not affected.

A financial instrument can be deactivated only once. It can only be deactivated by maker before the instrument override time. After that, anyone can deactivate this instrument.

Parameters

None

Return Values

None

setMakerWhitelist()

Update the maker whitelist.

Parameters

Type	Name	Description
address	makerAddress	The address of the maker.
bool	allowed	Whether the maker is allowed to create new issuance.

Return Values

None.

setTakerWhitelist()

Update the taker whitelist.

Parameters

Type	Name	Description
address	takerAddress	The address of the taker.
bool	allowed	Whether the taker is allowed to engage existing issuance.

Return Values

None.

createIssuance()

Create a new issuance of the financial instrument. Only whitelisted makers are allowed if maker whitelist is enabled.

Parameters

Type	Name	Description
bytes	makerParameters	Custom parameters of the issuance.

Return Values

Type	Name	Description
uint256	issuanceId	ID of the newly created issuance.

engageIssuance()

Engage an existing issuance.. Only whitelisted takers are allowed if taker whitelist is enabled.

Parameters

Type	Name	Description
uint256	issuanceId	ID of the issuance to engage.
bytes	takerParameters	Custom parameters of the engagement.

Return Values

None.

depositToIssuance()

Deposit from Instrument Escrow to issuance.

Parameters

Type	Name	Description
uint256	issuanceId	ID of the issuance to engage.
address	tokenAddress	Address of the token to deposit. ETH address is Constants.getEthAddress().
uint256	amount	Amount of token to deposit.

Return Values

None.

withdrawFromIssuance()

Withdraw from issuance to Instrument Escrow.

Parameters

Type	Name	Description
uint256	issuanceId	ID of the issuance to engage.
address	tokenAddress	Address of the token to withdraw. ETH address is Constants.getEthAddress().
uint256	amount	Amount of token to withdraw.

Return Values

None.

notifyCustomEvent()

Notify a custom event to the issuance.

Parameters

Type	Name	Description
uint256	issuanceId	ID of the issuance to engage.
bytes32	eventName	Name of the custom event.
bytes	eventPayload	Payload of the custom event.

Return Values

None.

getCustomData()

Get custom data from the issuance.

Parameters

Type	Name	Description
uint256	issuanceId	ID of the issuance to engage.
bytes32	dataName	Name of the data to retrieve.

Return Values

Type	Name	Description
bytes	customData	The custom data to return.