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I've read over the bip173, bip141, and bip143 specifications and they're a bit too technical to get at the simple answers I'm looking for.

  • Are you asking about the differences between P2WPKH/P2WSH in general, or about the differences between their corresponding address formats? – Pieter Wuille Dec 13 '18 at 23:21
  • In short, both. As you can see, I've added some of the research I've done over the past month or so. I'm programming a bech32 encoder/decoder in perl, but also trying to understand bech32, segwit, P2WPKH, and P2WSH beyond simply porting the code from the node/c++ code in bip173. – kawthuldrok Dec 13 '18 at 23:34
  • Also, there were few simple and concise answers that I could find with a google search that correspond to bech32 validation and how bech32 relates to SegWit, so I wanted to share the conclusions I came to. – kawthuldrok Dec 13 '18 at 23:38
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  • P2WPKH - This stands for "Pay To Witness Public Key Hash" and the scriptPubkey is OP_0 0x14 {20-byte-hash}, where OP_0 is the version, byte 0x14 is the size of the data, and the {20-byte-hash} is a HASH160(PubKey).
  • P2WSH - This stands for "Pay To Witness Script Hash" and the scriptPubkey is OP_0 0x20 {32-byte-hash}, where OP_0 is the version, byte 0x20 is the size of the data, and the {32-byte-hash} is a SHA256(script).

This data is taken from: http://bcoin.io/guides/segwit.html


Examples:

For the P2WPKH address: "bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4"

OP_0 , 0x14 , HASH160(PubKey) -- looks like (in hex):

00 14 751e76e8199196d454941c45d1b3a323f1433bd6

For the P2WSH address: "bc1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3qccfmv3"

OP_0 , 0x20 , SHA256(script) -- looks like (in hex):

00 20 1863143c14c5166804bd19203356da136c985678cd4d27a1b8c6329604903262

Examples taken from http://bitcoin.sipa.be/bech32/demo/demo.html and https://github.com/sipa/bech32/blob/master/ref/c%2B%2B/tests.cpp

  • Not MD5 (lol), it's SHA256. – Pieter Wuille Dec 13 '18 at 23:38
  • Ah, thanks! I thought md5 sounded wrong myself! – kawthuldrok Dec 13 '18 at 23:39

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