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The msg.sender is always the address of the entity who called the current contract. When a contract calls another contract the msg.sender changes. Let me give you some examples. Assuming we have a EOA (Externally Owned Account) A and contracts B and C. When A calls B the msg.sender in B is A's public address. If contract B also calls contract C, msg.sender ...


1

You're overlooking the mining step. Contract deployment is the result of a transaction, but first a transaction has to mine. In the interim, the first response from sending a transaction, which new DepositPaying(address(this)) does, is a transaction hash. That response doesn't indicate that the transaction is processed. Only that it was sent and assigned a ...


1

I would suggest you register your contract with Ethereum Name System (ENS) during the deployment. Create an ENS name Update its ADDRESS record to point to the latest contract deployment during the deployment https://medium.com/the-ethereum-name-service/new-text-records-now-available-for-ens-names-in-manager-a0ebb9cda73a You can do this programmatically ...


1

When you compile your contracts inside a truffle project, only the modified ones get compiled, if a build exists yet (if you want to recompile all contracts, run truffle compile --all). From the command line, there is no options to just deploy one specific contract, but you can use the flags --f <number> and --to <number> to specify which ...


1

Yes, the migration has failed. This error means you have insufficient Ethers to deploy your contract, you should therefore redeploy with the correct amount of ETH.


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