switched over to ext-secp256k1_nostr phpecc implementation of SchnorrSignature gave many invalid signature errors, so switching over (for transpher) to ext-secp256k1_nostr (github.com/1ma/secp256k1-nostr-php). For future libraries support for phpecc is desirable, because extensions can (most likely) not be deployed to shared hosting environments github.com/nostriphant/transpher/commit/a8ac4d4aedcf60f0cb6ac0e0c35cca38e9905dee #transpher #nostrifying-php