diff --git a/bip352-testsuite/bech32m.py b/bip352-testsuite/bech32m.py new file mode 100644 index 0000000000..795e153863 --- /dev/null +++ b/bip352-testsuite/bech32m.py @@ -0,0 +1,135 @@ +# Copyright (c) 2017, 2020 Pieter Wuille +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in +# all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +# THE SOFTWARE. + +"""Reference implementation for Bech32/Bech32m and segwit addresses.""" + + +from enum import Enum + +class Encoding(Enum): + """Enumeration type to list the various supported encodings.""" + BECH32 = 1 + BECH32M = 2 + +CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l" +BECH32M_CONST = 0x2bc830a3 + +def bech32_polymod(values): + """Internal function that computes the Bech32 checksum.""" + generator = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3] + chk = 1 + for value in values: + top = chk >> 25 + chk = (chk & 0x1ffffff) << 5 ^ value + for i in range(5): + chk ^= generator[i] if ((top >> i) & 1) else 0 + return chk + + +def bech32_hrp_expand(hrp): + """Expand the HRP into values for checksum computation.""" + return [ord(x) >> 5 for x in hrp] + [0] + [ord(x) & 31 for x in hrp] + + +def bech32_verify_checksum(hrp, data): + """Verify a checksum given HRP and converted data characters.""" + const = bech32_polymod(bech32_hrp_expand(hrp) + data) + if const == 1: + return Encoding.BECH32 + if const == BECH32M_CONST: + return Encoding.BECH32M + return None + +def bech32_create_checksum(hrp, data, spec): + """Compute the checksum values given HRP and data.""" + values = bech32_hrp_expand(hrp) + data + const = BECH32M_CONST if spec == Encoding.BECH32M else 1 + polymod = bech32_polymod(values + [0, 0, 0, 0, 0, 0]) ^ const + return [(polymod >> 5 * (5 - i)) & 31 for i in range(6)] + + +def bech32_encode(hrp, data, spec): + """Compute a Bech32 string given HRP and data values.""" + combined = data + bech32_create_checksum(hrp, data, spec) + return hrp + '1' + ''.join([CHARSET[d] for d in combined]) + +def bech32_decode(bech): + """Validate a Bech32/Bech32m string, and determine HRP and data.""" + if ((any(ord(x) < 33 or ord(x) > 126 for x in bech)) or + (bech.lower() != bech and bech.upper() != bech)): + return (None, None, None) + bech = bech.lower() + pos = bech.rfind('1') + + # remove the requirement that bech32m be less than 90 chars + if pos < 1 or pos + 7 > len(bech): + return (None, None, None) + if not all(x in CHARSET for x in bech[pos+1:]): + return (None, None, None) + hrp = bech[:pos] + data = [CHARSET.find(x) for x in bech[pos+1:]] + spec = bech32_verify_checksum(hrp, data) + if spec is None: + return (None, None, None) + return (hrp, data[:-6], spec) + +def convertbits(data, frombits, tobits, pad=True): + """General power-of-2 base conversion.""" + acc = 0 + bits = 0 + ret = [] + maxv = (1 << tobits) - 1 + max_acc = (1 << (frombits + tobits - 1)) - 1 + for value in data: + if value < 0 or (value >> frombits): + return None + acc = ((acc << frombits) | value) & max_acc + bits += frombits + while bits >= tobits: + bits -= tobits + ret.append((acc >> bits) & maxv) + if pad: + if bits: + ret.append((acc << (tobits - bits)) & maxv) + elif bits >= frombits or ((acc << (tobits - bits)) & maxv): + return None + return ret + + +def decode(hrp, addr): + """Decode a segwit address.""" + hrpgot, data, spec = bech32_decode(addr) + if hrpgot != hrp: + return (None, None) + decoded = convertbits(data[1:], 5, 8, False) + if decoded is None or len(decoded) < 2: + return (None, None) + if data[0] > 16: + return (None, None) + return (data[0], decoded) + + +def encode(hrp, witver, witprog): + """Encode a segwit address.""" + spec = Encoding.BECH32 if witver == 0 else Encoding.BECH32M + ret = bech32_encode(hrp, [witver] + convertbits(witprog, 8, 5), spec) + if decode(hrp, ret) == (None, None): + return None + return ret diff --git a/bip352-testsuite/bip352-send_and_receive_test_vectors.json b/bip352-testsuite/bip352-send_and_receive_test_vectors.json new file mode 100644 index 0000000000..6ceb55d78a --- /dev/null +++ b/bip352-testsuite/bip352-send_and_receive_test_vectors.json @@ -0,0 +1,2039 @@ +[ + { + "comment": "Simple send: two inputs", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + }, + "private_key": "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1" + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "48304602210086783ded73e961037e77d49d9deee4edc2b23136e9728d56e4491c80015c3a63022100fda4c0f21ea18de29edbce57f7134d613e044ee150a89e2e64700de2d4e83d4e2103bd85685d03d111699b15d046319febe77f8de5286e9e512703cdee1bf3be3792", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a914d9317c66f54ff0a152ec50b1d19c25be50c8e15988ac" + } + }, + "private_key": "93f5ed907ad5b2bdbbdcb5d9116ebc0a4e1f92f910d5260237fa45a9408aad16" + } + ], + "recipients": [ + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", + 1.0 + ] + ] + }, + "expected": { + "outputs": [ + [ + "3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1", + 1.0 + ] + ] + } + } + ], + "receiving": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": 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"9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3", + "scan_priv_key": "0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c" + }, + "labels": [] + }, + "expected": { + "addresses": [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv" + ], + "outputs": [ + { + "pub_key": "3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1", + "priv_key_tweak": "f438b40179a3c4262de12986c0e6cce0634007cdc79c1dcd3e20b9ebc2e7eef6", + "signature": "74f85b856337fbe837643b86f462118159f93ac4acc2671522f27e8f67b079959195ccc7a5dbee396d2909f5d680d6e30cda7359aa2755822509b70d6b0687a1" + } + ] + } + } + ] + }, + { + "comment": "Simple send: two inputs, order reversed", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": 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+ [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", + 1.0 + ] + ] + }, + "expected": { + "outputs": [ + [ + "3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1", + 1.0 + ] + ] + } + } + ], + "receiving": [ + { + "given": { + "vin": [ + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + } + }, + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "48304602210086783ded73e961037e77d49d9deee4edc2b23136e9728d56e4491c80015c3a63022100fda4c0f21ea18de29edbce57f7134d613e044ee150a89e2e64700de2d4e83d4e2103bd85685d03d111699b15d046319febe77f8de5286e9e512703cdee1bf3be3792", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a914d9317c66f54ff0a152ec50b1d19c25be50c8e15988ac" + } + } + } + ], + "outputs": [ + "3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1" + ], + "key_material": { + "spend_priv_key": "9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3", + "scan_priv_key": "0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c" + }, + "labels": [] + }, + "expected": { + "addresses": [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv" + ], + "outputs": [ + { + "pub_key": "3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1", + "priv_key_tweak": "f438b40179a3c4262de12986c0e6cce0634007cdc79c1dcd3e20b9ebc2e7eef6", + "signature": "74f85b856337fbe837643b86f462118159f93ac4acc2671522f27e8f67b079959195ccc7a5dbee396d2909f5d680d6e30cda7359aa2755822509b70d6b0687a1" + } + ] + } + } + ] + }, + { + "comment": "Simple send: two inputs from the same transaction", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 3, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + }, + "private_key": "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1" + }, + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 7, + "scriptSig": "48304602210086783ded73e961037e77d49d9deee4edc2b23136e9728d56e4491c80015c3a63022100fda4c0f21ea18de29edbce57f7134d613e044ee150a89e2e64700de2d4e83d4e2103bd85685d03d111699b15d046319febe77f8de5286e9e512703cdee1bf3be3792", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a914d9317c66f54ff0a152ec50b1d19c25be50c8e15988ac" + } + }, + "private_key": "93f5ed907ad5b2bdbbdcb5d9116ebc0a4e1f92f910d5260237fa45a9408aad16" + } + ], + "recipients": [ + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", + 1.0 + ] + ] + }, + "expected": { + "outputs": [ + [ + "79e71baa2ba3fc66396de3a04f168c7bf24d6870ec88ca877754790c1db357b6", + 1.0 + ] + ] + } + } + ], + "receiving": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 3, + "scriptSig": 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"9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3", + "scan_priv_key": "0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c" + }, + "labels": [] + }, + "expected": { + "addresses": [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv" + ], + "outputs": [ + { + "pub_key": "79e71baa2ba3fc66396de3a04f168c7bf24d6870ec88ca877754790c1db357b6", + "priv_key_tweak": "4851455bfbe1ab4f80156570aa45063201aa5c9e1b1dcd29f0f8c33d10bf77ae", + "signature": "10332eea808b6a13f70059a8a73195808db782012907f5ba32b6eae66a2f66b4f65147e2b968a1678c5f73d57d5d195dbaf667b606ff80c8490eac1f3b710657" + } + ] + } + } + ] + }, + { + "comment": "Simple send: two inputs from the same transaction, order reversed", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 7, + "scriptSig": 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"ab0c9b87181bf527879f48db9f14a02233619b986f8e8f2d5d408ce68a709f51", + "signature": "398a9790865791a9db41a8015afad3a47d60fec5086c50557806a49a1bc038808632b8fe679a7bb65fc6b455be994502eed849f1da3729cd948fc7be73d67295" + } + ] + } + } + ] + }, + { + "comment": "Single recipient: multiple UTXOs from the same public key", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + }, + "private_key": "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1" + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + }, + "private_key": "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1" + } + ], + "recipients": [ + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", + 1.0 + ] + ] + }, + "expected": { + "outputs": [ + [ + "548ae55c8eec1e736e8d3e520f011f1f42a56d166116ad210b3937599f87f566", + 1.0 + ] + ] + } + } + ], + "receiving": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": 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"expected": { + "outputs": [ + [ + "de88bea8e7ffc9ce1af30d1132f910323c505185aec8eae361670421e749a1fb", + 1.0 + ] + ] + } + } + ], + "receiving": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "", + "txinwitness": "0140c459b671370d12cfb5acee76da7e3ba7cc29b0b4653e3af8388591082660137d087fdc8e89a612cd5d15be0febe61fc7cdcf3161a26e599a4514aa5c3e86f47b", + "prevout": { + "scriptPubKey": { + "hex": "51205a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5" + } + } + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "", + "txinwitness": "0140bd1e708f92dbeaf24a6b8dd22e59c6274355424d62baea976b449e220fd75b13578e262ab11b7aa58e037f0c6b0519b66803b7d9decaa1906dedebfb531c56c1", + "prevout": { + "scriptPubKey": { + "hex": "5120782eeb913431ca6e9b8c2fd80a5f72ed2024ef72a3c6fb10263c379937323338" + } + } + } + ], + "outputs": [ + "de88bea8e7ffc9ce1af30d1132f910323c505185aec8eae361670421e749a1fb" + ], + "key_material": { + "spend_priv_key": "9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3", + "scan_priv_key": "0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c" + }, + "labels": [] + }, + "expected": { + "addresses": [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv" + ], + "outputs": [ + { + "pub_key": "de88bea8e7ffc9ce1af30d1132f910323c505185aec8eae361670421e749a1fb", + "priv_key_tweak": "3fb9ce5ce1746ced103c8ed254e81f6690764637ddbc876ec1f9b3ddab776b03", + "signature": "c5acd25a8f021a4192f93bc34403fd8b76484613466336fb259c72d04c169824f2690ca34e96cee86b69f376c8377003268fda56feeb1b873e5783d7e19bcca5" + } + ] + } + } + ] + }, + { + "comment": "Single recipient: taproot only with mixed even/odd y-values", + "sending": [ + { + "given": { + "vin": [ + { + "txid": 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"scriptPubKey": { + "hex": "51208c8d23d4764feffcd5e72e380802540fa0f88e3d62ad5e0b47955f74d7b283c4" + } + } + } + ], + "outputs": [ + "77cab7dd12b10259ee82c6ea4b509774e33e7078e7138f568092241bf26b99f1" + ], + "key_material": { + "spend_priv_key": "9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3", + "scan_priv_key": "0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c" + }, + "labels": [] + }, + "expected": { + "addresses": [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv" + ], + "outputs": [ + { + "pub_key": "77cab7dd12b10259ee82c6ea4b509774e33e7078e7138f568092241bf26b99f1", + "priv_key_tweak": "f5382508609771068ed079b24e1f72e4a17ee6d1c979066bf1d4e2a5676f09d4", + "signature": "ff65833b8fd1ed3ef9d0443b4f702b45a3f2dd457ba247687e8207745c3be9d2bdad0ab3f07118f8b2efc6a04b95f7b3e218daf8a64137ec91bd2fc67fc137a5" + } + ] + } + } + ] + }, + { + "comment": "Single recipient: taproot input with even y-value and non-taproot input", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "", + "txinwitness": "0140c459b671370d12cfb5acee76da7e3ba7cc29b0b4653e3af8388591082660137d087fdc8e89a612cd5d15be0febe61fc7cdcf3161a26e599a4514aa5c3e86f47b", + "prevout": { + "scriptPubKey": { + "hex": "51205a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5" + } + }, + "private_key": "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1" + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "463044021f24e010c6e475814740ba24c8cf9362c4db1276b7f46a7b1e63473159a80ec30221008198e8ece7b7f88e6c6cc6bb8c86f9f00b7458222a8c91addf6e1577bcf7697e2103e0ec4f64b3fa2e463ccfcf4e856e37d5e1e20275bc89ec1def9eb098eff1f85d", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a9148cbc7dfe44f1579bff3340bbef1eddeaeb1fc97788ac" + } 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"sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqsg59z2rppn4qlkx0yz9sdltmjv3j8zgcqadjn4ug98m3t6plujsq9qvu5n", + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgq7c2zfthc6x3a5yecwc52nxa0kfd20xuz08zyrjpfw4l2j257yq6qgnkdh5" + ], + "outputs": [ + { + "pub_key": "7efa60ce78ac343df8a013a2027c6c5ef29f9502edcbd769d2c21717fecc5951", + "priv_key_tweak": "e336b92330c33030285ce42e4115ad92d5197913c88e06b9072b4a9b47c664a2", + "signature": "c9e80dd3bdd25ca2d352ce77510f1aed37ba3509dc8cc0677f2d7c2dd04090707950ce9dd6c83d2a428063063aff5c04f1744e334f661f2fc01b4ef80b50f739" + } + ] + } + } + ] + }, + { + "comment": "Multiple outputs with labels: multiple outputs for labeled address; same recipient", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": 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labeled address; same recipient", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + }, + "private_key": "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1" + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "473045022100a8c61b2d470e393279d1ba54f254b7c237de299580b7fa01ffcc940442ecec4502201afba952f4e4661c40acde7acc0341589031ba103a307b886eb867b23b850b972103782eeb913431ca6e9b8c2fd80a5f72ed2024ef72a3c6fb10263c379937323338", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a9147cdd63cc408564188e8e472640e921c7c90e651d88ac" + } + }, + "private_key": "0378e95685b74565fa56751b84a32dfd18545d10d691641b8372e32164fad66a" + } + ], + "recipients": [ + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", + 5.0 + ], + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqaxww2fnhrx05cghth75n0qcj59e3e2anscr0q9wyknjxtxycg07y3pevyj", + 6.0 + ], + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjyh2ju7hd5gj57jg5r9lev3pckk4n2shtzaq34467erzzdfajfggty6aa5", + 7.0 + ], + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjyh2ju7hd5gj57jg5r9lev3pckk4n2shtzaq34467erzzdfajfggty6aa5", + 8.0 + ] + ] + }, + "expected": { + "outputs": [ + [ + "f207162b1a7abc51c42017bef055e9ec1efc3d3567cb720357e2b84325db33ac", + 5.0 + ], + [ + "39f42624d5c32a77fda80ff0acee269afec601d3791803e80252ae04e4ffcf4c", + 6.0 + ], + [ + "ae1a780c04237bd577283c3ddb2e499767c3214160d5a6b0767e6b8c278bd701", + 7.0 + ], + [ + "f4569fc5f69c10f0082cfbb8e072e6266ec55f69fba8cffca4cbb4c144b7e59b", + 8.0 + ] + ] + } + } + ], + "receiving": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + } + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "473045022100a8c61b2d470e393279d1ba54f254b7c237de299580b7fa01ffcc940442ecec4502201afba952f4e4661c40acde7acc0341589031ba103a307b886eb867b23b850b972103782eeb913431ca6e9b8c2fd80a5f72ed2024ef72a3c6fb10263c379937323338", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a9147cdd63cc408564188e8e472640e921c7c90e651d88ac" + } + } + } + ], + "outputs": [ + "f207162b1a7abc51c42017bef055e9ec1efc3d3567cb720357e2b84325db33ac", + "39f42624d5c32a77fda80ff0acee269afec601d3791803e80252ae04e4ffcf4c", + "ae1a780c04237bd577283c3ddb2e499767c3214160d5a6b0767e6b8c278bd701", + "f4569fc5f69c10f0082cfbb8e072e6266ec55f69fba8cffca4cbb4c144b7e59b" + ], + "key_material": { + "spend_priv_key": "9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3", + "scan_priv_key": "0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c" + }, + "labels": [ + 1 + ] + }, + "expected": { + "addresses": [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqaxww2fnhrx05cghth75n0qcj59e3e2anscr0q9wyknjxtxycg07y3pevyj" + ], + "outputs": [ + { + "pub_key": "f207162b1a7abc51c42017bef055e9ec1efc3d3567cb720357e2b84325db33ac", + "priv_key_tweak": "33ce085c3c11eaad13694aae3c20301a6c83382ec89a7cde96c6799e2f88805a", + "signature": "335667ca6cae7a26438f5cfdd73b3d48fa832fa9768521d7d5445f22c203ab0d74ed85088f27d29959ba627a4509996676f47df8ff284d292567b1beef0e3912" + }, + { + "pub_key": "39f42624d5c32a77fda80ff0acee269afec601d3791803e80252ae04e4ffcf4c", + "priv_key_tweak": "43100f89f1a6bf10081c92b473ffc57ceac7dbed600b6aba9bb3976f17dbb914", + "signature": "15c92509b67a6c211ebb4a51b7528d0666e6720de2343b2e92cfb97942ca14693c1f1fdc8451acfdb2644039f8f5c76114807fdc3d3a002d8a46afab6756bd75" + } + ] + } + } + ] + }, + { + "comment": "Single recipient: use silent payments for sender change", + "sending": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + }, + "private_key": "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1" + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "473045022100a8c61b2d470e393279d1ba54f254b7c237de299580b7fa01ffcc940442ecec4502201afba952f4e4661c40acde7acc0341589031ba103a307b886eb867b23b850b972103782eeb913431ca6e9b8c2fd80a5f72ed2024ef72a3c6fb10263c379937323338", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a9147cdd63cc408564188e8e472640e921c7c90e651d88ac" + } + }, + "private_key": "0378e95685b74565fa56751b84a32dfd18545d10d691641b8372e32164fad66a" + } + ], + "recipients": [ + [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", + 1.0 + ], + [ + "sp1qqw6vczcfpdh5nf5y2ky99kmqae0tr30hgdfg88parz50cp80wd2wqqlv6saelkk5snl4wfutyxrchpzzwm8rjp3z6q7apna59z9huq4x754e5atr", + 2.0 + ] + ] + }, + "expected": { + "outputs": [ + [ + "f207162b1a7abc51c42017bef055e9ec1efc3d3567cb720357e2b84325db33ac", + 1.0 + ], + [ + "be368e28979d950245d742891ae6064020ba548c1e2e65a639a8bb0675d95cff", + 2.0 + ] + ] + } + } + ], + "receiving": [ + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + } + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "473045022100a8c61b2d470e393279d1ba54f254b7c237de299580b7fa01ffcc940442ecec4502201afba952f4e4661c40acde7acc0341589031ba103a307b886eb867b23b850b972103782eeb913431ca6e9b8c2fd80a5f72ed2024ef72a3c6fb10263c379937323338", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a9147cdd63cc408564188e8e472640e921c7c90e651d88ac" + } + } + } + ], + "outputs": [ + "f207162b1a7abc51c42017bef055e9ec1efc3d3567cb720357e2b84325db33ac", + "be368e28979d950245d742891ae6064020ba548c1e2e65a639a8bb0675d95cff" + ], + "key_material": { + "spend_priv_key": "b8f87388cbb41934c50daca018901b00070a5ff6cc25a7e9e716a9d5b9e4d664", + "scan_priv_key": "11b7a82e06ca2648d5fded2366478078ec4fc9dc1d8ff487518226f229d768fd" + }, + "labels": [ + 0 + ] + }, + "expected": { + "addresses": [ + "sp1qqw6vczcfpdh5nf5y2ky99kmqae0tr30hgdfg88parz50cp80wd2wqqauj52ymtc4xdkmx3tgyhrsemg2g3303xk2gtzfy8h8ejet8fz8jcw23zua", + "sp1qqw6vczcfpdh5nf5y2ky99kmqae0tr30hgdfg88parz50cp80wd2wqqlv6saelkk5snl4wfutyxrchpzzwm8rjp3z6q7apna59z9huq4x754e5atr" + ], + "outputs": [ + { + "pub_key": "be368e28979d950245d742891ae6064020ba548c1e2e65a639a8bb0675d95cff", + "priv_key_tweak": "80cd767ed20bd0bb7d8ea5e803f8c381293a62e8a073cf46fb0081da46e64e1f", + "signature": "7fbd5074cf1377273155eefafc7c330cb61b31da252f22206ac27530d2b2567040d9af7808342ed4a09598c26d8307446e4ed77079e6a2e61fea736e44da5f5a" + } + ] + } + }, + { + "given": { + "vin": [ + { + "txid": "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16", + "vout": 0, + "scriptSig": "483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac" + } + } + }, + { + "txid": "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d", + "vout": 0, + "scriptSig": "473045022100a8c61b2d470e393279d1ba54f254b7c237de299580b7fa01ffcc940442ecec4502201afba952f4e4661c40acde7acc0341589031ba103a307b886eb867b23b850b972103782eeb913431ca6e9b8c2fd80a5f72ed2024ef72a3c6fb10263c379937323338", + "txinwitness": "", + "prevout": { + "scriptPubKey": { + "hex": "76a9147cdd63cc408564188e8e472640e921c7c90e651d88ac" + } + } + } + ], + "outputs": [ + "f207162b1a7abc51c42017bef055e9ec1efc3d3567cb720357e2b84325db33ac", + "be368e28979d950245d742891ae6064020ba548c1e2e65a639a8bb0675d95cff" + ], + "key_material": { + "spend_priv_key": "9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3", + "scan_priv_key": "0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c" + }, + "labels": [] + }, + "expected": { + "addresses": [ + "sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv" + ], + "outputs": [ + { + "pub_key": "f207162b1a7abc51c42017bef055e9ec1efc3d3567cb720357e2b84325db33ac", + "priv_key_tweak": "33ce085c3c11eaad13694aae3c20301a6c83382ec89a7cde96c6799e2f88805a", + "signature": "335667ca6cae7a26438f5cfdd73b3d48fa832fa9768521d7d5445f22c203ab0d74ed85088f27d29959ba627a4509996676f47df8ff284d292567b1beef0e3912" + } + ] + } + } + ] + } +] \ No newline at end of file diff --git a/bip352-testsuite/ripemd160.py b/bip352-testsuite/ripemd160.py new file mode 100644 index 0000000000..12801364b4 --- /dev/null +++ b/bip352-testsuite/ripemd160.py @@ -0,0 +1,130 @@ +# Copyright (c) 2021 Pieter Wuille +# Distributed under the MIT software license, see the accompanying +# file COPYING or http://www.opensource.org/licenses/mit-license.php. +"""Test-only pure Python RIPEMD160 implementation.""" + +import unittest + +# Message schedule indexes for the left path. +ML = [ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, + 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, + 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, + 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13 +] + +# Message schedule indexes for the right path. +MR = [ + 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, + 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, + 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, + 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, + 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11 +] + +# Rotation counts for the left path. +RL = [ + 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, + 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, + 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, + 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, + 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6 +] + +# Rotation counts for the right path. +RR = [ + 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, + 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, + 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, + 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, + 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11 +] + +# K constants for the left path. +KL = [0, 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e] + +# K constants for the right path. +KR = [0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9, 0] + + +def fi(x, y, z, i): + """The f1, f2, f3, f4, and f5 functions from the specification.""" + if i == 0: + return x ^ y ^ z + elif i == 1: + return (x & y) | (~x & z) + elif i == 2: + return (x | ~y) ^ z + elif i == 3: + return (x & z) | (y & ~z) + elif i == 4: + return x ^ (y | ~z) + else: + assert False + + +def rol(x, i): + """Rotate the bottom 32 bits of x left by i bits.""" + return ((x << i) | ((x & 0xffffffff) >> (32 - i))) & 0xffffffff + + +def compress(h0, h1, h2, h3, h4, block): + """Compress state (h0, h1, h2, h3, h4) with block.""" + # Left path variables. + al, bl, cl, dl, el = h0, h1, h2, h3, h4 + # Right path variables. + ar, br, cr, dr, er = h0, h1, h2, h3, h4 + # Message variables. + x = [int.from_bytes(block[4*i:4*(i+1)], 'little') for i in range(16)] + + # Iterate over the 80 rounds of the compression. + for j in range(80): + rnd = j >> 4 + # Perform left side of the transformation. + al = rol(al + fi(bl, cl, dl, rnd) + x[ML[j]] + KL[rnd], RL[j]) + el + al, bl, cl, dl, el = el, al, bl, rol(cl, 10), dl + # Perform right side of the transformation. + ar = rol(ar + fi(br, cr, dr, 4 - rnd) + x[MR[j]] + KR[rnd], RR[j]) + er + ar, br, cr, dr, er = er, ar, br, rol(cr, 10), dr + + # Compose old state, left transform, and right transform into new state. + return h1 + cl + dr, h2 + dl + er, h3 + el + ar, h4 + al + br, h0 + bl + cr + + +def ripemd160(data): + """Compute the RIPEMD-160 hash of data.""" + # Initialize state. + state = (0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0) + # Process full 64-byte blocks in the input. + for b in range(len(data) >> 6): + state = compress(*state, data[64*b:64*(b+1)]) + # Construct final blocks (with padding and size). + pad = b"\x80" + b"\x00" * ((119 - len(data)) & 63) + fin = data[len(data) & ~63:] + pad + (8 * len(data)).to_bytes(8, 'little') + # Process final blocks. + for b in range(len(fin) >> 6): + state = compress(*state, fin[64*b:64*(b+1)]) + # Produce output. + return b"".join((h & 0xffffffff).to_bytes(4, 'little') for h in state) + + +class TestFrameworkKey(unittest.TestCase): + def test_ripemd160(self): + """RIPEMD-160 test vectors.""" + # See https://homes.esat.kuleuven.be/~bosselae/ripemd160.html + for msg, hexout in [ + (b"", "9c1185a5c5e9fc54612808977ee8f548b2258d31"), + (b"a", "0bdc9d2d256b3ee9daae347be6f4dc835a467ffe"), + (b"abc", "8eb208f7e05d987a9b044a8e98c6b087f15a0bfc"), + (b"message digest", "5d0689ef49d2fae572b881b123a85ffa21595f36"), + (b"abcdefghijklmnopqrstuvwxyz", + "f71c27109c692c1b56bbdceb5b9d2865b3708dbc"), + (b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", + "12a053384a9c0c88e405a06c27dcf49ada62eb2b"), + (b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", + "b0e20b6e3116640286ed3a87a5713079b21f5189"), + (b"1234567890" * 8, "9b752e45573d4b39f4dbd3323cab82bf63326bfb"), + (b"a" * 1000000, "52783243c1697bdbe16d37f97f68f08325dc1528") + ]: + self.assertEqual(ripemd160(msg).hex(), hexout) diff --git a/bip352-testsuite/run_bip352_tests.py b/bip352-testsuite/run_bip352_tests.py new file mode 100755 index 0000000000..1861434ee8 --- /dev/null +++ b/bip352-testsuite/run_bip352_tests.py @@ -0,0 +1,227 @@ +#!/usr/bin/env python3 +import bech32m +import hashlib +import json +import ripemd160 +import secp256k1_glue + +def sha256(s): + return hashlib.sha256(s).digest() + +def hash160(s): + return ripemd160.ripemd160(sha256(s)) + +def TaggedHash(tag, data): + return sha256(sha256(tag) + sha256(tag) + data) + +def smallest_outpoint(outpoints): + serialized_outpoints = [bytes.fromhex(txid)[::-1] + n.to_bytes(4, 'little') for txid, n in outpoints] + return sorted(serialized_outpoints)[0] + +def encode_silent_payment_address(scan_pubkey, spend_pubkey): + assert len(scan_pubkey) == 33 + assert len(spend_pubkey) == 33 + data = bech32m.convertbits(scan_pubkey + spend_pubkey, 8, 5) + return bech32m.bech32_encode("sp", [0] + data, bech32m.Encoding.BECH32M) + +def decode_silent_payments_address(address): + version, data = bech32m.decode("sp", address) + data = bytes(data) # convert from list to bytes + assert len(data) == 66 + return data[:33], data[33:] + +def is_p2tr(s): # OP_1 OP_PUSHBYTES_32 <32 bytes> + return (len(s) == 34) and (s[0] == 0x51) and (s[1] == 0x20) + +def is_p2wpkh(s): # OP_0 OP_PUSHBYTES_20 <20 bytes> + return (len(s) == 22) and (s[0] == 0x00) and (s[1] == 0x14) + +def is_p2sh(s): # OP_HASH160 OP_PUSHBYTES_20 <20 bytes> OP_EQUAL + return (len(s) == 23) and (s[0] == 0xA9) and (s[1] == 0x14) and (s[-1] == 0x87) + +def is_p2pkh(s): # OP_DUP OP_HASH160 OP_PUSHBYTES_20 <20 bytes> OP_EQUALVERIFY OP_CHECKSIG + return (len(s) == 25) and (s[0] == 0x76) and (s[1] == 0xA9) and (s[2] == 0x14) and (s[-2] == 0x88) and (s[-1] == 0xAC) + +def get_pubkey_from_input(spk, script_sig, witness): + if is_p2pkh(spk): + spk_pkh = spk[3:3 + 20] + for i in range(len(script_sig), 0, -1): + if i - 33 >= 0: + pk = script_sig[i - 33:i] + if hash160(pk) == spk_pkh: + return pk + # should never happen, as this would be an invalid spend + assert False + if is_p2sh(spk): + redeem_script = script_sig[1:] + if is_p2wpkh(redeem_script): + return redeem_script[-33:] + if is_p2wpkh(spk): + # the witness must contain two items and the second item is the pubkey + return witness[-33:] + if is_p2tr(spk): + return spk[2:] + assert False + +with open('./bip352-send_and_receive_test_vectors.json') as f: + test_vectors = json.load(f) + +passed_send, passed_receive = 0, 0 +for test_nr, test_vector in enumerate(test_vectors): + print(f"----- Test vector: \'{test_vector['comment']}\' {test_nr+1}/{len(test_vectors)} -----") + ###################### sending ######################### + assert len(test_vector['sending']) == 1 + send_data_given = test_vector['sending'][0]['given'] + send_data_expected = test_vector['sending'][0]['expected'] + input_priv_keys = [] + outpoints = [] + for i in send_data_given['vin']: + priv_key = i['private_key'] + pub_key = get_pubkey_from_input(bytes.fromhex(i['prevout']['scriptPubKey']['hex']), + bytes.fromhex(i['scriptSig']), bytes.fromhex(i['txinwitness'])) + input_priv_keys.append((i['private_key'], len(pub_key) == 32)) + outpoints.append((i['txid'], i['vout'])) + outpoint_L = smallest_outpoint(outpoints) + outputs_calculated = [] + + groups = {} + for recipient_address, recipient_value in send_data_given['recipients']: + recipient_B_scan, recipient_B_spend = decode_silent_payments_address(recipient_address) + groups.setdefault(recipient_B_scan, []).append((recipient_B_spend, recipient_value)) + + for recipient_B_scan, recipient_spend_data in groups.items(): + plain_seckeys, xonly_seckeys = [], [] + for seckey_hex, is_taproot in input_priv_keys: + (xonly_seckeys if is_taproot else plain_seckeys).append(bytes.fromhex(seckey_hex)) + tweak_data = secp256k1_glue.silentpayments_create_private_tweak_data( + plain_seckeys, xonly_seckeys, outpoint_L) + shared_secret = secp256k1_glue.silentpayments_send_create_shared_secret(tweak_data, recipient_B_scan) + k = 0 + for recipient_B_spend in recipient_spend_data: + output = secp256k1_glue.silentpayments_create_output_pubkey(shared_secret, recipient_B_spend[0], k) + outputs_calculated.append(output.hex()) + k += 1 + outputs_expected = [o[0] for o in send_data_expected['outputs']] + if outputs_calculated == outputs_expected: + print("Sending test \033[0;32mPASSED. ✓\033[0m") + passed_send += 1 + else: + print("Sending test \033[0;31mFAILED. ✖\033[0m") + print(f"Calculated outputs: {outputs_calculated}") + print(f"Expected outputs: {outputs_expected}") + + ###################### receiving ######################## + assert len(test_vector['receiving']) >= 1 + for subtest_nr, receive_data in enumerate(test_vector['receiving']): + receive_data_given = receive_data['given'] + receive_data_expected = receive_data['expected'] + + input_pub_keys = [] + outpoints = [] + for i in receive_data_given['vin']: + pub_key = get_pubkey_from_input(bytes.fromhex(i['prevout']['scriptPubKey']['hex']), + bytes.fromhex(i['scriptSig']), bytes.fromhex(i['txinwitness'])) + input_pub_keys.append(pub_key) + outpoints.append((i['txid'], i['vout'])) + receive_outpoint_L = smallest_outpoint(outpoints) + + # test data sanity check: outpoint_L of send and receive has to match + assert receive_outpoint_L == outpoint_L + # derive tweak_data and shared_secret + plain_pubkeys, xonly_pubkeys = [], [] + for pubkey in input_pub_keys: + if len(pubkey) == 32: + xonly_pubkeys.append(pubkey) + elif len(pubkey) == 33: + plain_pubkeys.append(pubkey) + else: + assert False + tweak_data = secp256k1_glue.silentpayments_create_tweak_data(plain_pubkeys, xonly_pubkeys, receive_outpoint_L) + scan_privkey = bytes.fromhex(receive_data_given['key_material']['scan_priv_key']) + spend_privkey = bytes.fromhex(receive_data_given['key_material']['spend_priv_key']) + # spend pubkey is not in the given data of the receiver part, so let's compute it + scan_pubkey = secp256k1_glue.pubkey_serialize((secp256k1_glue.pubkey_create(scan_privkey))) + spend_pubkey = secp256k1_glue.pubkey_serialize((secp256k1_glue.pubkey_create(spend_privkey))) + shared_secret = secp256k1_glue.silentpayments_receive_create_shared_secret(tweak_data, scan_privkey) + outputs_pubkeys_expected = [o['pub_key'] for o in receive_data_expected['outputs']] + outputs_privkeys_expected = [o['priv_key_tweak'] for o in receive_data_expected['outputs']] + outputs_scanned = [] + outputs_privkeys = [] + + # scan through outputs + k = 0 + outputs_to_check = receive_data_given['outputs'].copy() + while True: + if len(outputs_to_check) == 0: + break + for output_to_check in outputs_to_check: + found_sth = False + for label_m in [None] + receive_data_given['labels']: + if label_m is None: + label_tweak = None + else: + label_tweak = secp256k1_glue.silentpayments_create_label_tweak(scan_privkey, label_m) + output_pubkey = secp256k1_glue.silentpayments_create_output_pubkey(shared_secret, spend_pubkey, k, label_tweak) + if output_pubkey.hex() in outputs_to_check: + outputs_to_check.remove(output_pubkey.hex()) + outputs_scanned.append(output_pubkey.hex()) + output_privkey = secp256k1_glue.silentpayments_create_output_seckey(shared_secret, spend_privkey, k, label_tweak) + # a bit hacky: subtract the receiver spend key from the output privkey to get the expected tweak + privkey_tweak = secp256k1_glue.seckey_subtract(output_privkey, spend_privkey) + outputs_privkeys.append(privkey_tweak.hex()) + k += 1 + found_sth = True + break + if not found_sth: + break + + all_subtests_passed = True + # check if addresses match + calculated_addresses = [] + for label_m in [None] + receive_data_given['labels']: + if label_m is None: + output_spend_pubkey = spend_pubkey + else: + label_tweak = secp256k1_glue.silentpayments_create_label_tweak(scan_privkey, label_m) + output_spend_pubkey = secp256k1_glue.silentpayments_create_address_spend_pubkey(spend_pubkey, label_tweak) + output_address = encode_silent_payment_address(scan_pubkey, output_spend_pubkey) + calculated_addresses.append(output_address) + + if calculated_addresses == receive_data_expected['addresses']: + print(f"Receiving sub-test [addresses] {subtest_nr+1}/{len(test_vector['receiving'])} \033[0;32mPASSED. ✓\033[0m") + else: + print(f"Receiving sub-test [addresses] {subtest_nr+1}/{len(test_vector['receiving'])} \033[0;31mFAILED. ✖\033[0m") + print(f"Calculated addresses: {calculated_addresses}") + print(f"Expected addresses: {receive_data_expected['addresses']}") + all_subtests_passed = False + + # check if output pubkey match + if outputs_scanned == outputs_pubkeys_expected: + print(f"Receiving sub-test [output pubkey] {subtest_nr+1}/{len(test_vector['receiving'])} \033[0;32mPASSED. ✓\033[0m") + else: + print(f"Receiving sub-test [output pubkey] {subtest_nr+1}/{len(test_vector['receiving'])} \033[0;31mFAILED. ✖\033[0m") + print(f"Scanned output pubkeys: {outputs_scanned}") + print(f"Expected outputs pubkeys: {outputs_expected}") + all_subtests_passed = False + + # check if output spending keys also match + if outputs_privkeys == outputs_privkeys_expected: + print(f"Receiving sub-test [output privkey] {subtest_nr+1}/{len(test_vector['receiving'])} \033[0;32mPASSED. ✓\033[0m") + else: + print(f"Receiving sub-test [output privkey] {subtest_nr+1}/{len(test_vector['receiving'])} \033[0;31mFAILED. ✖\033[0m") + print(f"Calculated output privkeys: {outputs_privkeys}") + print(f"Expected outputs privkeys: {outputs_privkeys_expected}") + all_subtests_passed = False + + if all_subtests_passed: + print("Receiving test \033[0;32mPASSED. ✓\033[0m") + passed_receive += 1 + else: + print("Receiving test \033[0;31mFAILED. ✖\033[0m") + +print( "+=================================+") +print( "| Summary: |") +print( "+---------------------------------+") +print(f"| {passed_send}/{len(test_vectors)} sending tests passed. |") +print(f"| {passed_receive}/{len(test_vectors)} receiving tests passed. |") +print( "+=================================+") diff --git a/bip352-testsuite/secp256k1_glue.py b/bip352-testsuite/secp256k1_glue.py new file mode 100644 index 0000000000..0b0cef4c4d --- /dev/null +++ b/bip352-testsuite/secp256k1_glue.py @@ -0,0 +1,320 @@ +from ctypes import * +import os + +secplib = CDLL('../.libs/libsecp256k1.so') +secplib.secp256k1_context_create.restype = c_voidp +secp_context = secplib.secp256k1_context_create(1) + +################################## +### API calls from secp256k1.h ### +################################## +SECP256K1_PUBKEY_STRUCT_SIZE = 64 +""" +int secp256k1_ec_pubkey_create( + const secp256k1_context *ctx, + secp256k1_pubkey *pubkey, + const unsigned char *seckey +); +""" +secplib.secp256k1_ec_pubkey_create.argtypes = [c_voidp, c_voidp, c_voidp] +secplib.secp256k1_ec_pubkey_create.restype = c_int +def pubkey_create(privkey_bytes): + pk = create_string_buffer(SECP256K1_PUBKEY_STRUCT_SIZE) + retval = secplib.secp256k1_ec_pubkey_create(secp_context, pk, privkey_bytes) + assert retval == 1 + return pk + +""" +int secp256k1_ec_pubkey_parse( + const secp256k1_context *ctx, + secp256k1_pubkey *pubkey, + const unsigned char *input, + size_t inputlen +); +""" +secplib.secp256k1_ec_pubkey_parse.argtypes = [c_voidp, c_voidp, c_voidp, c_size_t] +secplib.secp256k1_ec_pubkey_parse.restype = c_int +def pubkey_parse(pubkey_bytes): + pk = create_string_buffer(SECP256K1_PUBKEY_STRUCT_SIZE) + retval = secplib.secp256k1_ec_pubkey_parse(secp_context, pk, pubkey_bytes, 33) + assert retval == 1 + return pk + +""" +int secp256k1_ec_pubkey_serialize( + const secp256k1_context *ctx, + unsigned char *output, + size_t *outputlen, + const secp256k1_pubkey *pubkey, + unsigned int flags +); +""" +secplib.secp256k1_ec_pubkey_serialize.argtypes = [c_voidp, c_voidp, c_voidp, c_voidp, c_uint] +secplib.secp256k1_ec_pubkey_serialize.restype = c_int +def pubkey_serialize(pubkey_obj): + ser_pubkey = create_string_buffer(33) + ser_pubkey_size = c_size_t(33) + retval = secplib.secp256k1_ec_pubkey_serialize(secp_context, + ser_pubkey, pointer(ser_pubkey_size), pubkey_obj, (1 << 1) | (1 << 8)) + assert retval == 1 + return bytes(ser_pubkey) + +""" +int secp256k1_ec_seckey_negate( + const secp256k1_context *ctx, + unsigned char *seckey +); +int secp256k1_ec_seckey_tweak_add( + const secp256k1_context *ctx, + unsigned char *seckey, + const unsigned char *tweak32 +); +""" +secplib.secp256k1_ec_seckey_negate.argtypes = [c_voidp, c_voidp] +secplib.secp256k1_ec_seckey_negate.restype = c_int +secplib.secp256k1_ec_seckey_tweak_add.argtypes = [c_voidp, c_voidp] +secplib.secp256k1_ec_seckey_tweak_add.restype = c_int +def seckey_subtract(seckey_lhs, seckey_rhs): + seckey_to_sub = create_string_buffer(seckey_rhs, 32) + retval = secplib.secp256k1_ec_seckey_negate(secp_context, seckey_to_sub) + assert retval == 1 + seckey_result = create_string_buffer(seckey_lhs, 32) + retval = secplib.secp256k1_ec_seckey_tweak_add(secp_context, seckey_result, seckey_to_sub) + assert retval == 1 + return bytes(seckey_result) + +############################################ +### API calls from secp256k1_extrakeys.h ### +############################################ +SECP256K1_XONLY_PUBKEY_STRUCT_SIZE = 64 +""" +int secp256k1_xonly_pubkey_parse( + const secp256k1_context *ctx, + secp256k1_xonly_pubkey *pubkey, + const unsigned char *input32 +); +""" +secplib.secp256k1_xonly_pubkey_parse.argtypes = [c_voidp, c_voidp, c_voidp] +secplib.secp256k1_xonly_pubkey_parse.restype = c_int +def xonly_pubkey_parse(xonly_pubkey_bytes): + xpk = create_string_buffer(SECP256K1_XONLY_PUBKEY_STRUCT_SIZE) + retval = secplib.secp256k1_xonly_pubkey_parse(secp_context, xpk, xonly_pubkey_bytes) + assert retval == 1 + return xpk + +""" +secp256k1_xonly_pubkey_serialize( + const secp256k1_context *ctx, + unsigned char *output32, + const secp256k1_xonly_pubkey *pubkey +); +""" +secplib.secp256k1_xonly_pubkey_serialize.argtypes = [c_voidp, c_voidp, c_voidp] +secplib.secp256k1_xonly_pubkey_serialize.restype = c_int +def xonly_pubkey_serialize(xpubkey_obj): + ser_xpubkey = create_string_buffer(32) + retval = secplib.secp256k1_xonly_pubkey_serialize(secp_context, ser_xpubkey, xpubkey_obj) + assert retval == 1 + return bytes(ser_xpubkey) + +################################################# +### API calls from secp256k1_silentpayments.h ### +################################################# +""" +int secp256k1_silentpayments_create_private_tweak_data( + const secp256k1_context *ctx, + unsigned char *tweak_data32, + const unsigned char * const *plain_seckeys, + size_t n_plain_seckeys, + const unsigned char * const *taproot_seckeys, + size_t n_taproot_seckeys, + const unsigned char *outpoint_lowest36 +); +""" +secplib.secp256k1_silentpayments_create_private_tweak_data.argtypes = [ + c_voidp, c_voidp, c_voidp, c_size_t, c_voidp, c_size_t, c_voidp +] +secplib.secp256k1_silentpayments_send_create_shared_secret.restype = c_int +def silentpayments_create_private_tweak_data(plain_seckeys, xonly_seckeys, outpoint_lowest): + array_plain_seckeys = (c_char_p * len(plain_seckeys))() + array_xonly_seckeys = (c_char_p * len(xonly_seckeys))() + for i in range(len(plain_seckeys)): array_plain_seckeys[i] = plain_seckeys[i] + if len(array_plain_seckeys) == 0: array_plain_seckeys = None + for i in range(len(xonly_seckeys)): array_xonly_seckeys[i] = xonly_seckeys[i] + if len(array_xonly_seckeys) == 0: array_xonly_seckeys = None + + result_tweak_data = create_string_buffer(32) + retval = secplib.secp256k1_silentpayments_create_private_tweak_data( + secp_context, result_tweak_data, array_plain_seckeys, len(plain_seckeys), + array_xonly_seckeys, len(xonly_seckeys), outpoint_lowest) + assert retval == 1 + + return bytes(result_tweak_data) + +""" +int secp256k1_silentpayments_send_create_shared_secret( + const secp256k1_context *ctx, + unsigned char *shared_secret33, + const unsigned char *tweak_data32, + const secp256k1_pubkey *receiver_scan_pubkey +); +""" +secplib.secp256k1_silentpayments_send_create_shared_secret.argtypes = [ + c_voidp, c_voidp, c_voidp, c_voidp +] +secplib.secp256k1_silentpayments_send_create_shared_secret.restype = c_int +def silentpayments_send_create_shared_secret(tweak_data, receiver_scan_pubkey): + # convert receiver pubkey to secp256k1 object + receiver_scan_pubkey_obj = pubkey_parse(receiver_scan_pubkey) + + result_shared_secret = create_string_buffer(33) + retval = secplib.secp256k1_silentpayments_send_create_shared_secret( + secp_context, result_shared_secret, tweak_data, receiver_scan_pubkey_obj) + assert retval == 1 + + return bytes(result_shared_secret) + +""" +int secp256k1_silentpayments_create_public_tweak_data( + const secp256k1_context *ctx, + secp256k1_pubkey *public_tweak_data, + const secp256k1_pubkey * const *plain_pubkeys, + size_t n_plain_pubkeys, + const secp256k1_xonly_pubkey * const *xonly_pubkeys, + size_t n_xonly_pubkeys, + const unsigned char *outpoint_lowest36 +); +""" +secplib.secp256k1_silentpayments_create_public_tweak_data.argtypes = [ + c_voidp, c_voidp, c_voidp, c_size_t, c_voidp, c_size_t, c_voidp +] +secplib.secp256k1_silentpayments_create_public_tweak_data.restype = c_int +def silentpayments_create_tweak_data(plain_pubkeys, xonly_pubkeys, outpoint_lowest): + # convert raw plain pubkeys to secp256k1 pubkeys + plain_pubkeys_objs = [pubkey_parse(p) for p in plain_pubkeys] + xonly_pubkeys_objs = [xonly_pubkey_parse(p) for p in xonly_pubkeys] + array_plain_pubkeys = (c_voidp * len(plain_pubkeys))() + for i in range(len(plain_pubkeys)): array_plain_pubkeys[i] = cast(plain_pubkeys_objs[i], c_voidp) + array_xonly_pubkeys = (c_voidp * len(xonly_pubkeys))() + for i in range(len(xonly_pubkeys)): array_xonly_pubkeys[i] = cast(xonly_pubkeys_objs[i], c_voidp) + if len(array_plain_pubkeys) == 0: array_plain_pubkeys = None + if len(array_xonly_pubkeys) == 0: array_xonly_pubkeys = None + + result_tweak_data = create_string_buffer(SECP256K1_PUBKEY_STRUCT_SIZE) + retval = secplib.secp256k1_silentpayments_create_public_tweak_data( + secp_context, result_tweak_data, array_plain_pubkeys, len(plain_pubkeys), + array_xonly_pubkeys, len(xonly_pubkeys), outpoint_lowest) + assert retval == 1 + + return result_tweak_data + +""" +int secp256k1_silentpayments_receive_create_shared_secret( + const secp256k1_context *ctx, + unsigned char *shared_secret33, + const secp256k1_pubkey *public_tweak_data, + const unsigned char *receiver_scan_seckey +); +""" +secplib.secp256k1_silentpayments_receive_create_shared_secret.argtypes = [ + c_voidp, c_voidp, c_voidp, c_voidp +] +secplib.secp256k1_silentpayments_receive_create_shared_secret.restype = c_int +def silentpayments_receive_create_shared_secret(tweak_data, receiver_scan_seckey): + result_shared_secret = create_string_buffer(33) + retval = secplib.secp256k1_silentpayments_receive_create_shared_secret( + secp_context, result_shared_secret, tweak_data, receiver_scan_seckey) + assert retval == 1 + return bytes(result_shared_secret) + +""" +int secp256k1_silentpayments_create_label_tweak( + const secp256k1_context *ctx, + unsigned char *label_tweak32, + const unsigned char *receiver_scan_seckey, + unsigned int m +); +""" +secplib.secp256k1_silentpayments_create_label_tweak.argtypes = [ + c_voidp, c_voidp, c_voidp, c_uint +] +secplib.secp256k1_silentpayments_create_label_tweak.restype = c_int +def silentpayments_create_label_tweak(receiver_scan_seckey, m): + result_label_tweak = create_string_buffer(32) + retval = secplib.secp256k1_silentpayments_create_label_tweak( + secp_context, result_label_tweak, receiver_scan_seckey, m) + assert retval == 1 + return bytes(result_label_tweak) + +""" +int secp256k1_silentpayments_create_address_spend_pubkey( + const secp256k1_context *ctx, + unsigned char *l_addr_spend_pubkey33, + const secp256k1_pubkey *receiver_spend_pubkey, + const unsigned char *label_tweak32 +); +""" +secplib.secp256k1_silentpayments_create_address_spend_pubkey.argtypes = [ + c_voidp, c_voidp, c_voidp, c_voidp +] +secplib.secp256k1_silentpayments_create_address_spend_pubkey.restype = c_int +def silentpayments_create_address_spend_pubkey(receiver_spend_pubkey, label_tweak): + result_address_spend_pubkey = create_string_buffer(33) + # convert receiver pubkey to secp256k1 object + receiver_spend_pubkey_obj = pubkey_parse(receiver_spend_pubkey) + + retval = secplib.secp256k1_silentpayments_create_address_spend_pubkey( + secp_context, result_address_spend_pubkey, receiver_spend_pubkey_obj, label_tweak) + assert retval == 1 + return bytes(result_address_spend_pubkey) + +""" +int secp256k1_silentpayments_create_output_pubkey( + const secp256k1_context *ctx, + secp256k1_xonly_pubkey *output_xonly_pubkey, + const unsigned char *shared_secret33, + const secp256k1_pubkey *receiver_spend_pubkey, + unsigned int k, + const unsigned char *label_tweak32 +); +""" +secplib.secp256k1_silentpayments_create_output_pubkey.argtypes = [ + c_voidp, c_voidp, c_voidp, c_voidp, c_uint, c_voidp +] +secplib.secp256k1_silentpayments_create_output_pubkey.restype = c_int +def silentpayments_create_output_pubkey(shared_secret, receiver_spend_pubkey, k, label_tweak=None): + result_xpubkey = create_string_buffer(SECP256K1_XONLY_PUBKEY_STRUCT_SIZE) + # convert receiver pubkey to secp256k1 object + receiver_spend_pubkey_obj = pubkey_parse(receiver_spend_pubkey) + + retval = secplib.secp256k1_silentpayments_create_output_pubkey( + secp_context, result_xpubkey, shared_secret, receiver_spend_pubkey_obj, k, label_tweak) + assert retval == 1 + + # serialize and return resulting x-only pubkey + output = create_string_buffer(32) + retval = secplib.secp256k1_xonly_pubkey_serialize(secp_context, output, result_xpubkey) + assert retval == 1 + + return bytes(output) + +""" +int secp256k1_silentpayments_create_output_seckey( + const secp256k1_context *ctx, + unsigned char *output_seckey, + const unsigned char *shared_secret33, + const unsigned char *receiver_spend_seckey, + unsigned int k, + const unsigned char *label_tweak32 +); +""" +secplib.secp256k1_silentpayments_create_output_seckey.argtypes = [ + c_voidp, c_voidp, c_voidp, c_voidp, c_uint, c_voidp +] +secplib.secp256k1_silentpayments_create_output_seckey.restype = c_int +def silentpayments_create_output_seckey(shared_secret, receiver_spend_seckey, k, label_tweak=None): + result_seckey = create_string_buffer(32) + retval = secplib.secp256k1_silentpayments_create_output_seckey( + secp_context, result_seckey, shared_secret, receiver_spend_seckey, k, label_tweak) + assert retval == 1 + return bytes(result_seckey)