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Questions regarding the act of calling or interacting with (a.k.a. invoking) a contract on the Ethereum blockchain by a user or another contract on the blockchain. Includes both local invocation by call and global invocation by transaction.

0 votes
1 answer
2k views

Trying to run contract function returns error "invalid opcode"

Looks like there are a couple of unanswered threads about this already, though mine is a more simple setup so maybe it will be easier to debug. Running through testrpc I have a deployed contract, it …
joe's user avatar
  • 269
2 votes
2 answers
895 views

How do I deploy a contract, then send and retrieve a string from it?

I wish to store strings on-chain. From what I understand so far, I need to set up a contract, then I can send transactions (with a string) to that contract which will be stored. Is this the best way …
joe's user avatar
  • 269