Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/setup-dotnet@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

Nullability of reference types in type of parameter 'x' of 'int TxComparer.Compare(Transaction x, Transaction y)' doesn't match implicitly implemented member 'int IComparer<Transaction>.Compare(Transaction? x, Transaction? y)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'y' of 'int TxComparer.Compare(Transaction x, Transaction y)' doesn't match implicitly implemented member 'int IComparer<Transaction>.Compare(Transaction? x, Transaction? y)' (possibly because of nullability attributes).

Possible null reference return.

Converting null literal or possible null value to non-nullable type.

Possible null reference return.

Possible null reference argument for parameter 'item' in 'bool SortedSet<Transaction>.Remove(Transaction item)'.

Possible null reference return.

Possible null reference return.

Cannot convert null literal to non-nullable reference type.