Featured Contract

• Smart Contract: SRC20 specific

• Created: Step 2 in SRC20 deployment (see Swarm Tokenization App)

• Purpose: Manages additional token contract features for a specific SCR20 token contract, and checks the state of the SRC20 token contract (e.g. whether it is currently paused for transfers)

• Example: NUVO on Ropsten

Feature Description

Read Functions

Function	Description
isTokenPaused()	Displays true/false based on whether the SRC20 token contract is paused
pausable()	Displays the index of this feature, for checking if enabled. Index = 2
paused()	Displays true/false based on whether the SRC20 token contract is paused
isEnabled()	Returns true/false based on whether a specific SRC20 token feature is enabled. Requires the user to enter the index of the feature.
accountBurning()	Displays the index of this feature, for checking if enabled. Index = 4
accountFreezing()	Displays the index of this feature, for checking if enabled. Index = 8
_enabledFeatures()	Internal function
owner()	Returns the address of the contract owner
isOwner()	Returns true if the caller is the contract owner
forceTransfer()	Displays the index of this feature, for checking if enabled. Index = 1
checkTransfer()	Call to check if a transfer of SRC20 tokens between two addresses will pass under any restrictions set by this Features contract. Transfer rules need to be checked separately in the Transfer Rules contract of this SRC20
isAccountFrozen()	Returns true/false whether a specified account holding these SRC20 tokens is frozen, meaning it is disabled from being able to make transfers of any of this SRC20 token

Write Functions

Function	Description
pauseToken()	Pauses the SRC20 token. No transfers of any kind can take place while being paused. Can only be called by the contract owner if Pausable() functionality is enabled
renounceOwnership()	Leaves this Token Features contract without an owner. Can only be called by the contract owner. Subsequently, it will no longer be possible to call functions with onlyOwner modifiers, thereby removing any functionality that is only available to the contract owner
unfreezeAccount()	Unfreezes a specific address, enabling it to initiate transfers. Can only be called by the contract owner if AccountFreezing() functionality is enabled
unPauseToken()	Reverses the pausing of a token and transfers for this SRC20 token will resume being possible. Can only be called by the contract owner if Pausable() functionality is enabled.
freezeAccount()	Freezes a specific address, disabling it from being able to initiate transfers of this SRC20 token. Can only be called by the contract owner if AccountFreezing() functionality is enabled
transferOwnership()	Transfers ownership of this Token Features contract to a new contract owner. Can only be called by the contract owner