Failure when interacting with chains that use older pallet-contracts versions

[cmichi]

I'm trying to instantiate flipper from ink-examples on either Pendulum or Ternoa.

cargo-contract fails with an error due to issues with metadata. I believe those chains use an older version of pallet-contracts.

➜  flipper git:(heads/v5.x.x) ✗ cargo contract instantiate --url wss://pendulum-rpc.dwellir.com --args true --suri //Alice -x
Warning: This chain does not yet support checking for compatibility of your contract types (https://use.ink/faq#type-comparison).
 Dry-running new (skip with --skip-dry-run)
ERROR: Could not decode `ContractResult::events`:
	Could not decode variant byte for `Option`:
		Not enough data to fill buffer


Caused by:
    0: Could not decode variant byte for `Option`:
       	Not enough data to fill buffer
       
    1: Not enough data to fill buffer


➜  flipper git:(heads/v5.x.x) ✗ cargo contract instantiate --url wss://mainnet.ternoa.network --args true --suri //Alice -x
Warning: This chain does not yet support checking for compatibility of your contract types (https://use.ink/faq#type-comparison).
 Dry-running new (skip with --skip-dry-run)
ERROR: Could not decode `ContractResult::events`:
	Could not decode variant byte for `Option`:
		Not enough data to fill buffer


Caused by:
    0: Could not decode variant byte for `Option`:
       	Not enough data to fill buffer
       
    1: Not enough data to fill buffer

[smiasojed]

The events: Option<Vec<EventRecord>> member variable of the ContractResult struct is missing in the pallet_contracts_primitives version 7.0.0 crate used in pendulum chain.