I am defining a contract and I want to ensure a particular member variable can only be modified by me. So, specifically I want to ensure that if someone else deploys one of my contracts, then they will not be able to modify this variable.

To do this I tried to hard-code my address, and test against msg.sender in the setter

contract Sample { address constant public myAddress = 0xe0f5206bbd039e7b0592d8918820024e2a7437b9; uint public vari; function setVari(uint a) { if(msg.sender == myAddress) { vari = a; } } } 

When I compile this, I get the following error

Warning: This looks like an address but has an invalid checksum. If this is not used as an address, please prepend '00'. address constant public myAddress = 0xe0f5206bbd039e7b0592d8918820024e2a7437b9; ^----------------------------------------^ 

And when I try to modify this variable within geth using

myInstance.setVari.sendTransaction(22, {from: eth.accounts[0]}) 

the value of "vari" is not updated. (Where eth.accounts[0] is the hardcoded address in the source.)

However, if I remove the protection within setVari(), everything works as expected.

This implies to me that everything I'm doing is correct, except the hard-coding of my address.

Can anyone help? How do I hard code my account into a contract?

Thanks!

Note: the address included is one I'm using on a private test network, so you won't be able to find it in the public network. However, I got the same compiler warning when I tried hard-coding one of my real accounts addresses.

I am defining a contract and I want to ensure a particular member variable can only be modified by me. So, specifically I want to ensure that if someone else deploys one of my contracts, then they will not be able to modify this variable.

To do this I tried to hard-code my address, and test against msg.sender in the setter

 contract Sample { address constant public myAddress = 0xe0f5206bbd039e7b0592d8918820024e2a7437b9; uint public vari; function setVari(uint a) { if(msg.sender == myAddress) { vari = a; } } } 

When I compile this, I get the following error

Warning: This looks like an address but has an invalid checksum. If this is not used as an address, please prepend '00'. address constant public myAddress = 0xe0f5206bbd039e7b0592d8918820024e2a7437b9; ^----------------------------------------^ 

And when I try to modify this variable within geth using

myInstance.setVari.sendTransaction(22, {from: eth.accounts[0]}) 

the value of "vari" is not updated. (Where eth.accounts[0] is the hardcoded address in the source.)

However, if I remove the protection within setVari(), everything works as expected.

This implies to me that everything I'm doing is correct, except the hard-coding of my address.

Can anyone help? How do I hard code my account into a contract?

Thanks!

Note: the address included is one I'm using on a private test network, so you won't be able to find it in the public network. However, I got the same compiler warning when I tried hard-coding one of my real accounts addresses.