Contract does not exist

Question

I'm using a Granadanet node to experiment with Liquidity Baking. I'm trying to call the tzBTC contract's mint entry point.

This is my first time using a test net, but I thought that it was a copy of the previous main net + the new changes to be applied (Granada in this case). If this is correct, then I would expect the tzBTC contract here to exist on Granadanet.

However, when I attempt to call the mint entry point of that contract, I get the error Contract KT1PWx2mnDueood7fEmfbBDKx1D9BAnnXitn does not exist.

Here is the command I am running to call that mint entry point:

tezos-client transfer 0 from alice to KT1PWx2mnDueood7fEmfbBDKx1D9BAnnXitn \
                --entrypoint mint \
                --arg '(Pair "tz1eYpX4e1nu7e3cvtF7UvKFqUvWDahte1ot" 100)' \
                --burn-cap 3

Here is the entire console out when I run the above command:

Waiting for the node to be bootstrapped...
Current head: BLoSXfco1Dj5 (timestamp: 2021-07-20T21:52:57.000-00:00, validation: 2021-07-20T21:53:07.132-00:00)
Node is bootstrapped.
This simulation failed:
  Manager signed operations:
    From: tz1eYpX4e1nu7e3cvtF7UvKFqUvWDahte1ot
    Fee to the baker: ꜩ0
    Expected counter: 144380
    Gas limit: 1000
    Storage limit: 60000 bytes
    Revelation of manager public key:
      Contract: tz1eYpX4e1nu7e3cvtF7UvKFqUvWDahte1ot
      Key: edpktobpzH61rWMtrx8AtAkJhDdW3DDuof71hwostS4uPqGottCXvE
      This revelation was successfully applied
      Consumed gas: 1000
  Manager signed operations:
    From: tz1eYpX4e1nu7e3cvtF7UvKFqUvWDahte1ot
    Fee to the baker: ꜩ0
    Expected counter: 144381
    Gas limit: 1040000
    Storage limit: 60000 bytes
    Transaction:
      Amount: ꜩ0
      From: tz1eYpX4e1nu7e3cvtF7UvKFqUvWDahte1ot
      To: KT1PWx2mnDueood7fEmfbBDKx1D9BAnnXitn
      Entrypoint: mint
      Parameter: (Pair "tz1eYpX4e1nu7e3cvtF7UvKFqUvWDahte1ot" 100)
      This operation FAILED.

Contract KT1PWx2mnDueood7fEmfbBDKx1D9BAnnXitn does not exist
Fatal error:
  transfer simulation failed

Answer 1

I thought that it was a copy of the previous main net + the new changes to be applied (Granada in this case).

It isn't, testnets share no history with mainnet, or each-other. From the Test Networks docs:

every time a new protocol is proposed on Mainnet, a new test network is spawned. This also makes synchronization much faster than with a long-lived network.

So the contract you are trying to interact with indeed does not exist in granadanet.