14 questions
I want MetaMask to switch to the Rinkby Test Network, but it doesn't show up as a network option.I'm sorry for the rudimentary question, but I'd like you to tell me how to switch.I have already tried ...
Me: AERC20 tokens:CoinERC20 tokens:FundDeployer for both tokens is the same account: Zcounterpart:BI want to move the same amount of Coin from Z to B when A burns the FundIf you send thank you from A ...
I studied blockchain as a hobby, and I got a rough outline, but I don't really understand how to communicate with each other.In various reference books, Use P2P communication~ is written, but even if ...
Until now, I used Remix or Truffle to deploy SmartContract.I decided to use py-solc-x because I wished I could deploy it on Python.I couldn't solve the problem, so I would like to ask for your help th...
If you try to test if the string value is correct, an error occurs. When you do numbers, there are no errors and compiles well. However, the string keeps getting the following error message.Error: Mem...
I am working on a very simple smart contract that can save the value and get it back as a list. The code is as below.contract lister { mapping(int => string) list; int id = 0; function getList() re...
I am studying truffles recently and am working on the following documentary: http://truffleframework.com/tutorials/pet-shopWhenever I try to cause a transaction, the error below appears.Error: Error: ...
geth —testnet —syncmode fast —rpc —rpcapi db,eth,net,web3,personal —cache=1024 —rpcport 8545 —rpcaddr 127.0.0.1 —rpccorsdomain * Or geth —rinkeby —syncmode fast —rpc —rpcapi db,eth,net,web3,personal —...
I know that developers use various blockchains such as Hyperledger, multichain, Ethereum, and Corda with different network protocols.Developers and those who have a lot of knowledge about blockchain w...
When you look at the sample smart direct provided by Ethereum, the arrays are sometimes declared memory in the function, and sometimes they are not. What's the difference?Source: https://stackoverflow...
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