nl_tokens: / * Converts a Z secret key to a transmission key
pl_tokens: function zSecretKeyToTransmissionKey ( a_sk ) { var sk_enc = prf . PRF_addr_sk_enc ( <mask> . from ( a_sk , 'hex' ) ) ; // Curve 25519 clamping sk_enc [ 0 ] &= 248 ; sk_enc [ 32 ] &= 127 ; sk_enc [ 31 ] |= 64 ; return Buffer . from ( sodium . crypto_scalarmult_base ( sk_enc ) ) . toString ( 'hex' ) ; }