Change Details

``` This removes the dependency on OpenSSL for the interaction tests, by providing a pure-Python toy implementation of secp256k1. ``` Backport of core PR15826.

``` This removes the dependency on OpenSSL for the interaction tests, by providing a pure-Python toy implementation of secp256k1. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/15826 | PR15826]].

``` This removes the dependency on OpenSSL for the interaction tests, by providing a pure-Python toy implementation of secp256k1. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/15826 | PR15826]].