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• Bip32-chain-code

Bip32-chain-code-fix

Fixer for bip32-chain-code.

Signature

(bip32-chain-code-fix x) → fixed-x

Arguments

x — Guard (bip32-chain-code-p x).

Returns

fixed-x — Type (bip32-chain-code-p fixed-x).

Definitions and Theorems

Function: bip32-chain-code-fix

(defun bip32-chain-code-fix (x)
  (declare (xargs :guard (bip32-chain-code-p x)))
  (mbe :logic
       (if (bip32-chain-code-p x)
           x
         (repeat 32 0))
       :exec x))

Theorem: bip32-chain-code-p-of-bip32-chain-code-fix

(defthm bip32-chain-code-p-of-bip32-chain-code-fix
  (b* ((fixed-x (bip32-chain-code-fix x)))
    (bip32-chain-code-p fixed-x))
  :rule-classes :rewrite)

Theorem: bip32-chain-code-fix-when-bip32-chain-code-p

(defthm bip32-chain-code-fix-when-bip32-chain-code-p
  (implies (bip32-chain-code-p x)
           (equal (bip32-chain-code-fix x) x)))