The namehash of an empty string should be the zero address

[clowestab]

It's a small one.

In the namehash function definition of v6 (

ethers.js/src.ts/hash/namehash.ts

Line 70 in 6ee1a5f

assertArgument(name.length, `invalid ENS name (empty label)`, "name", name);

) you assert that the name be a none zero length string.

Strictly speaking according to the spec (https://eips.ethereum.org/EIPS/eip-137#namehash-algorithm) the namehash/node for a zero length string should be the zero address.