ContractRef objects don't implement SpreadAllocate trait.

[drewstone]

Overview

I'm trying to initialize a contract that holds both Mappings and ContractRefs to other contracts. It does not seem that contract references by default implement the necessary trait and as such I cannot compile these contracts. Is there a recommended method for init'ing contracts with these items side by side?

[HCastano]

I saw that you and @xgreenx had some discussions about this on Element. Do you mind re-posting any important bits from there here?

Can you also post a link to the contracts so that we can reproduce this.

[xgreenx]

The problem is that ContractRef and CallBuilder generated by codegen doesn't implement SpreadAllocate.

As a workaround, the user can implement SpreadAllocate manually current contract or the user can use AccountId instead of ContractRef(under the hood it is account id).

Also if the user has the source of the Contract, he can implement SpreadAllocate manually for ContractRef.

impl SpreadAllocate for ContractRef {
    fn allocate_spread(_ptr: &mut ink_primitives::KeyPtr) -> Self {
        FromAccountId::from_account_id([0; 32].into())
    }
}

[HCastano]

Marking this as low priority since it'll become obsolete with #1134.

If anybody can't get their contract compiling by manually implementing SpreadAllocate let us know here.

[cmichi]

Closing, as we removed anything SpreadLayout for ink! 4.0.