Yes, there will be - Testnet will remain on Cadence version 0.42 until we upgrade it to Cadence 1.0, targetting end of Apr.
We are proposing to have 2 testing networks for Cadence 1.0 (let’s call them here “Crescendo Stable TestNet” and “Crescendo Migration TestNet”).
Crescendo Stable Testnet (CSTN) is the one that is up already - we will upgrade it to C1.0 but we won’t run migrations for the existing contracts there (we might try but won’t guarantee that). Anyone can use it to test their dapps, play with C1.0, EVM on Flow etc.
Crescendo Migration TestNet (CMTN) will be wiped every week and bootstrapped again from a latest TestNet state snapshot. Every time this happens we will run the migrations for all contracts staged for 1.0 upgrade. The main purpose of CMTN is to test the migration process for existing dapps.
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