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• Bip39-entropy

Bip39-entropy-fix

Fixer for bip39-entropy.

Signature

(bip39-entropy-fix x) → fixed-x

Arguments

x — Guard (bip39-entropyp x).

Returns

fixed-x — Type (bip39-entropyp fixed-x).

Definitions and Theorems

Function: bip39-entropy-fix

(defun bip39-entropy-fix (x)
  (declare (xargs :guard (bip39-entropyp x)))
  (mbe :logic (if (bip39-entropyp x) x (repeat 128 0))
       :exec x))

Theorem: bip39-entropyp-of-bip39-entropy-fix

(defthm bip39-entropyp-of-bip39-entropy-fix
  (b* ((fixed-x (bip39-entropy-fix x)))
    (bip39-entropyp fixed-x))
  :rule-classes :rewrite)

Theorem: bip39-entropy-fix-when-bip39-entropyp

(defthm bip39-entropy-fix-when-bip39-entropyp
  (implies (bip39-entropyp x)
           (equal (bip39-entropy-fix x) x)))