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Seeds for Sprout master keys must also be at least 32 bytes.
Signed-off-by: Daira Hopwood <daira@jacaranda.org>
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@ -265,7 +265,7 @@ and decoding the 32-byte result according to the inverse of EncodeASK.
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Master key generation
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Let *S* be a seed byte sequence of a chosen length.
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Let *S* be a seed byte sequence of a chosen length, which MUST be at least 32 bytes.
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- Calculate *I* = BLAKE2b-512("ZcashIP32_Sprout", *S*).
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- Split *I* into two 32-byte sequences, I\ :sub:`L` and I\ :sub:`R`\ .
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