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Results tagged with ethereumj
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user 5549
For questions regarding the installation or use of EthereumJ, a Java library that implements the Ethereum protocol.
0
votes
Why am I getting TypeError: Member "balanceOf" not found or not visible after argument?
There is a lot going wrong here.
The short answer is tokenContract is a string because of this:
string public tokenContract;
There is no reason to think a string should have a method balanceOf(). …
- 55.6k
29
votes
'authentication needed: password or unlock' Error when trying to call smart contract method ...
First, make sure you have an account.
web3.personal.listAccounts
If you get [] ...
web3.personal.newAccount()
Try again.
Then ...
web3.personal.unlockAccount(web3.personal.listAccounts[0], …
- 55.6k
4
votes
Accepted
How to find out the value using call() method in truffle and testrpc?
You've got the right idea with checking balances for one address at a time and using promises.
The square brackets are weird here. Looks like you're adapting array style but this is a function call …
- 55.6k
1
vote
remove contract on ethereum blockchain using web3
What @manuhalo said, plus, you might want to consider pausing the contract with a run/stop method and modifier instead of selfDestruct() because the latter creates a sink hole. THe former can throw on …
- 55.6k
0
votes
Accepted
Implementing Events in Solidity (Remix)
You should define the event log outside the function with/after your state variables. Then emit events as transactions happen.
contract Thing {
event LogSomethingHappened(address sender, uint amo …
- 55.6k
1
vote
Accepted
How to resolve this error in solidity “The constructor should be payable if you send value.”?
The error message is misleading. You can safely disregard it since you aren't calling the constructor or sending funds.
It's a lot of code to wade through so this won't be very specific.
You say t …
- 55.6k
1
vote
Accepted
Nested Mapping not returning correct results
I played around with your code and came up with this:
pragma solidity ^0.4.11;
contract SampleContract {
struct ChildStruct {
bool isPresent;
bytes32 name;
}
struct ParentStruct {
…
- 55.6k