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@ -1207,7 +1207,7 @@ doesn't "run out" of keys.
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.Mind the Gap
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****
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An extended public key can generate approximately 4 billion direct
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An ((("gap limit", id="gap-limit")))extended public key can generate approximately 4 billion direct
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child keys, far more than any store or application should ever need.
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However, it would also take a wallet application an unreasonable amount
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of time to generate all 4 billion keys and scan the blockchain for
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@ -1250,7 +1250,7 @@ been proposed, such as
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asking the spender's wallet to construct (but not broadcast) a
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transaction paying a possibly reused address before they receive a fresh
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address for the actual transaction. However, these other solutions have
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not been used in production as of this writing.
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not been used in production as of this((("gap limit", startref="gap-limit"))) writing.
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****
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Another common application of this solution is for
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