Search Results

As long as you implement into your contract functions that allows it to interact with the contract that created the tokens, this is possible. If the token is a standard, like ERC20, the same code (cha …

You can not do this natively. As stated above you can use services. ETH-Tempus Oraclize Ethereum Alarm Clock ETH-Tempus is the simplest and cheaper. The difference with oraclize is that the gas co …

You should use the number that is multiplied by decimals (10**18). So if you want to transfer one token you pass the value 1000000000000000000. This is because there is not float number representation …

In any system that requires information, something or someone should provide the information. The contracts that you describe could very easily be implemented on ethereum. The information can be prov …

Using web3py you can access the functions in your contract, which I assume is what you are doing. From your code, I get that the contract instance is fcontract. You can do: fcontract.functions.inves …

You can do the matrix manipulations on python instead, using web3.py I hope this helps.

You could use any of the services available to schedule executions of functions. You can use: Ethereum Clock Alarm. Oraclize Chronos Disclaimer: I wrote the Chronos code and it is available only on …

There is an issue in the first contract. two = ConfigContract(msg.sender); The address you need to put in ConfigContract('address') is the address at which ConfigContract was deployed. Like this: …

Now will be the value of the timestamp of the current block, so the value will change with time.

The blacklist checking is simple: mapping (address => bool) public blacklist; // TODO: function to clear blacklist ----- if (msg.value < 0.005 ether) { require(firstPurchaceTierAllowe …

The thing is that the transfer method allows for 2300 gas stipend. Because the fallback has a transfer again, 2300 won't be enough. You can use addressB.call.value(msg.value)() which will pass all …

In this case you will use the Blockchain ( using a smart contract) as a source of truth that for each document will provide an unique identifier (the document's hash). Assume for example, that your ap …

If you send the data and then encrypt it in solidity, the data will be visible in the transaction that in the first place was used to send the data to the contract. Also, solidity doesn't have a funct …

assume that the ERC20 token that you want to transfer is called ERC20Token (thats the name of the contract) you can import ERC20Token contract (or the interface of it) in your contract and then do th …

Through human history people has come with new ideas and baptize these ideas with names. "Smart contract" is a name for one idea. It is nothing but a piece of code ( in this case running in a decentra …