NAME AND ADDRESS DECLARATION FOR RETIREES

Fill out this form and update your name and address. It will take 30 days for changes to take effect. If you want to change the name, please submit a legal proof of the new name. When submitting this form to the Virginia Retirement System (VRS), please attach a clear copy of your marriage certificate, divorce judgment or other court order to display your new name. If you fill out this form as a proxy or a guardian of a retiree or beneficiary, attach a letter of attorney or a parent's document. Health Welfare Program Participants after State Retirement: If you are updating your address, your health plan record will also be updated and all health planning letters (including benefit instructions) will be mailed to this address. If you enter this information on behalf of the retiree or beneficiary of the state's postretirement health benefit program, no change in address will be made unless the power of attorney explicitly grants access to the medical plan information.

Have you changed your name? If yes no please enter a new name below and provide a legal proof of the new name (eg court).

Virginia Retirement Fee System PO box 2500 • Richmond, Virginia 23218-2500 Toll-free 1-888-VARETIR (827-3847) Fax 1-804-786-9718 www.varetire.org

Line 4: Declare a state variable of address type named owner. It was declared private, so its value was not seen outside our contract. The address type contains a value of 160 bits. This is the Ethereum address size. The state variables are stored in the storage of the Smart Contract. A Smart Contract is a persistent storage area. Line 6: Provide a constructor that runs once when creating a Smart Contract. Its visibility is set publicly. That is, anyone can see it. All functions in the contract are public and, if not specified, this is the default visibility qualifier. The name of the constructor must be the same as the name of the contract, in our case ReactExample

Line 7: Declare a state variable of type string named state. Since it is declared private, its value does not appear outside the contract. Ambiguity avoidance Note: For learning reasons, I named state variables as state variables. A contract can contain any number of state variables suitable for the situation of the project. Line 20: Provide a function called getState whose visibility is public, along with the view and the returned qualifier. View informs the Solidity compiler that this function simply reads the contract state variable and does not change it. As of November 8, 2017, the Ethernet Virtual Machine (EVM) does not enforce this unique reading function. This function is where the code is executed in Ethereum block chain. The return qualifier tells the compiler whether or not to return a value at compile time.

Address public iMinter; Declares a publicly accessible state variable of address type. The address type is a 160-bit value and does not allow arithmetic operations. Since it has a public access type, you can access the current value of the data state variable it holds, and without this keyword other contracts can not access the variable. This function is as follows. event CoinsSentLog (address sentTo, uint amount); This event is invoked by the send function and listens for it. When triggered, the listener will receive parameters from arrival and quantity. This makes it possible to track transactions. To listen to this event, you can use the following code snippet.