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
0x1200 P-256 0x1201 P-384 0x1202 P-512
The keybytes are ANSI X9.63 encoded (important for compression)