AbiCoder accept arrays of values when it shouldn't

[fvictorio]

Ethers Version

5.7.1

Search Terms

defaultabicoder abicoder encode array arrays error throw

Describe the Problem

This produces a value:

> ethers.utils.defaultAbiCoder.encode(['uint16'], [[1, 2]])
'0x0000000000000000000000000000000000000000000000000000000000000102'

Maybe it's a feature? But I would've expected it to throw (the type is a uint16, not a uint16[]).

Code Snippet

ethers.utils.defaultAbiCoder.encode(['uint16'], [[1, 2]])

Contract ABI

No response

Errors

No response

Environment

node.js (v12 or newer)

Environment (Other)

No response

[ricmoo]

In v5, a BigNumberish is allowed to be a big-endian array. So, it's just interpreting it that way.

If you notice though, this will fail: utils.defaultAbiCoder.encode(['uint16'], [[1, 2, 3]]), because 3 bytes is too big for a uint16. ;)