didEncoded
Returns did:key:$MULTIBASE_ENCODING_IDENTIFIER$MULTICODEC_ALGORITHM_IDENTIFIER$BYTES with all bytes after MULTIBASE_ENCODING_IDENTIFIER in the assigned encoding.
Multicodec identifiers 0x120x are draft identifiers for P-xxx keys with point compression:
0x1200P-2560x1201P-3840x1202P-512
The keybytes are ANSI X9.63 encoded (important for compression)