6ecc41d126 Return error when constructing pubkey from slice (Tobin C. Harding)
Pull request description:
This PR fixes a bug introduced by me in #2473, and uncovered by #2563 - amazing that it was found so quickly!
Constructing a pubkey using `PublicKey::from_slice` can fail for reasons other than just incorrect length - we should not be using `expect` but rather returning the error.
A purist might argue that we are now returning a nested error type with an unreachable variant:
`ParsePublicKeyError::Encoding(FromSliceError::InvalidLength)`
Is this acceptable or do we want to further improve this?
ACKs for top commit:
sanket1729:
ACK 6ecc41d126
apoelstra:
ACK 6ecc41d126
Tree-SHA512: ae8299b21c4787a104f98533105308e8e7678cd5a29b78c30012982d741c05ba5f2bb1edd1d61d3a5ce028235d18c1511e1f94207479bc19e88cfec7a7ca1737
e0d58a9c1c