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@ -1064,6 +1064,7 @@ identified several problems((("public key cryptography", "base58check encoding")
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between wallets. That extra space means QR codes need to be larger at
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the same resolution or they become harder to scan quickly.
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[role="less_space pagebreak-before"]
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- It requires every spender wallet upgrade to support new protocol
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features like P2SH and segwit. Although the upgrades themselves might
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not require much code, experience shows that many wallet authors are
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