When formatting a transaction in 4.x, it it not more set to null if not provided or invalid

[Muhammad-Altabba]

When formatting a transaction in 1.x it used to be set to null if it was not provided or was not a valid address (being 0x for example), but in 4.x it is kept as undefined if it was not provided.

web3.js/packages/web3-core-helpers/src/formatters.js

Line 260 in 4e5afa1

tx.to = null; // set to `null` if invalid address

This is a breaking change that was not documented.

Do we like to keep this change, and document it? Or to keep the old behavior?

Hint: This breaking change required the following changes in this commit, for example: handle when tx.to is undefined instead of null

[mconnelly8]

We will keep this and update the documentation for the edge case.