a>
  unless you have a specific reason not to.
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<b class="Fn" title="Fn">crypto_x25519_public_key</b>() is the same as
  <a class="Xr" title="Xr" href="../crypto_key_exchange_public_key.html">crypto_key_exchange_public_key(3monocypher)</a>.
  It deterministically computes the public key from a random secret key.
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The arguments are:
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  <dt class="It-tag">&#x00A0;</dt>
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  <dt class="It-tag"><var class="Fa" title="