Ink SmartContract Enable Writer - TrackingChains/TrackingChain GitHub Wiki
The smart contract is programmed to accept by default only InsertTracking from the account that deployed the contract. Other accounts can also be enabled/disabled.
To do this, simply call the AddAdmin (using the account used to deploy the smart contract) and select the account to which we want to give write permission (in the example case ShibuyaTwoTest)