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roconnor-blockstream/Create Simplicity UTXO

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Example of sendings funds to an experimenal Simplicity address, `ert1l68kf04lea9jldsr5uszea6g6uf9jxx92jn3mswp7q3z04m4xnfzq4kqz7r` on elements regtest and redeeming thoses funds.
Raw
Create Simplicity UTXO
{
"txid": "0e8e133dd88282a4f64919e046027d3b40a572c32d0ce6b646a403bed0d51750",
"hash": "0e8e133dd88282a4f64919e046027d3b40a572c32d0ce6b646a403bed0d51750",
"wtxid": "0e8e133dd88282a4f64919e046027d3b40a572c32d0ce6b646a403bed0d51750",
"withash": "ab3393f4fb64685a4de07ac89c6903d6a0ba107c87fff33c9a981a7590bae48e",
"version": 2,
"size": 240,
"vsize": 240,
"weight": 960,
"locktime": 0,
"vin": [
{
"txid": "90673637f96363266d3836bd07f4a319ba9d363749076fda02e51eb2630b46d9",
"vout": 0,
"scriptSig": {
"asm": "",
"hex": ""
},
"is_pegin": false,
"sequence": 4294967293
}
],
"vout": [
{
"value": 1.00001000,
"asset": "b248df0c57c299290f3a46ff74e4a8ca9f365632bfd6fa43f915e6756bc756ee",
"commitmentnonce": "",
"commitmentnonce_fully_valid": false,
"n": 0,
"scriptPubKey": {
"asm": "-1 65e3fec95a686e3328badbb8cc7243febbd7f399c629ef22678fa0ae30b79401",
"hex": "4f2065e3fec95a686e3328badbb8cc7243febbd7f399c629ef22678fa0ae30b79401",
"reqSigs": 1,
"type": "witness_unknown",
"addresses": [
"ert1lvh3laj26dphrx296mwuvcujrl6aa0uuecc577gn837s2uv9hjsqsyrhw3l"
]
}
},
{
"value": 999998.99994200,
"asset": "b248df0c57c299290f3a46ff74e4a8ca9f365632bfd6fa43f915e6756bc756ee",
"commitmentnonce": "",
"commitmentnonce_fully_valid": false,
"n": 1,
"scriptPubKey": {
"asm": "0 9d49d38da6ace03ebdc8ee76ddaa462c2f30abf5",
"hex": "00149d49d38da6ace03ebdc8ee76ddaa462c2f30abf5",
"reqSigs": 1,
"type": "witness_v0_keyhash",
"addresses": [
"ert1qn4ya8rdx4nsra0wgaemdm2jx9shnp2l4kcp6gc"
]
}
},
{
"value": 0.00004800,
"asset": "b248df0c57c299290f3a46ff74e4a8ca9f365632bfd6fa43f915e6756bc756ee",
"commitmentnonce": "",
"commitmentnonce_fully_valid": false,
"n": 2,
"scriptPubKey": {
"asm": "",
"hex": "",
"type": "fee"
}
}
],
"hex": "020000000001d9460b63b21ee502da6f074937369dba19a3f407bd36386d266363f9373667900000000000fdffffff0301ee56c76b75e615f943fad6bf3256369fcaa8e474ff463a0f2999c2570cdf48b2010000000005f5e4e800224f2065e3fec95a686e3328badbb8cc7243febbd7f399c629ef22678fa0ae30b7940101ee56c76b75e615f943fad6bf3256369fcaa8e474ff463a0f2999c2570cdf48b20100005af30a844858001600149d49d38da6ace03ebdc8ee76ddaa462c2f30abf501ee56c76b75e615f943fad6bf3256369fcaa8e474ff463a0f2999c2570cdf48b20100000000000012c0000000000000",
"blockhash": "481c9b4e66209354f0e5a1ef3c589ab28f220ba9b69a474b8060357b6b8dbd7b",
"confirmations": 2,
"time": 1600265345,
"blocktime": 1600265345
}
Raw
Helper Program
module Simplicity.Elements.Example.CheckSigHashAll where
-- Built upon https://github.com/ElementsProject/simplicity/tree/ccd93b3dd7dab92f22fbc7ebe1e2f1359d854f59
import qualified Codec.Binary.Bech32.Internal as Bech32
import Data.Array (inRange, listArray)
import Data.Bifunctor (first)
import Data.Bits ((.&.), shiftL, testBit, xor)
import qualified Data.ByteString as BS
import qualified Data.ByteString.Char8 as BSC
import qualified Data.ByteString.Lazy as BSL
import Data.Char (toLower, toUpper)
import Data.Foldable (toList)
import Data.List (foldl')
import Data.Maybe (isNothing)
import Data.Serialize ( decode, encode, runPut
, put, putByteString
, putWord8, putWord16le, putWord32le, putWord64le
)
import Data.String (fromString)
import qualified Data.Text as Text
import Numeric (readHex, showHex)
import Simplicity.Digest
import Simplicity.LibSecp256k1.Schnorr
import Simplicity.MerkleRoot
import Simplicity.Programs.CheckSigHash
import Simplicity.Elements.Dag (unwrap)
import Simplicity.Elements.DataTypes
import Simplicity.Elements.Primitive
import Simplicity.Elements.Jets
import Simplicity.Elements.Programs.CheckSigHashAll.Lib
import Simplicity.Serialization
import qualified Simplicity.Ty.Word as Ty
import Simplicity.Word
order = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141
priv = order `div` 2
pubkey = XOnlyPubKey 0x00000000000000000000003b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63
k = order `div` 2
r :: Word256
r = 0x00000000000000000000003b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63
schnorrTag = encode . bsHash $ BSC.pack "BIPSchnorr"
sigTag = encode . bsHash $ BSC.pack "Simplicity-Draft\USSignature"
dummysig = Sig 0 0
simplictySegwitVersion = (-1) `mod` 32
Right hrp = Bech32.humanReadablePartFromText . fromString $ "ert"
hashAll_jets = jetSubst hashAll
program_jets sig = jetSubst $ checkSigHash' (unwrap hashAll_jets) pubkey sig
program_cmr = commitmentRoot . unwrap $ program_jets dummysig
Right address = Bech32.encode hrp (Bech32.dataPartFromWords [toEnum simplictySegwitVersion]
<> (Bech32.dataPartFromBytes . encode $ program_cmr))
default_amount = "100001000"
default_fee = "1000"
default_asset = "b248df0c57c299290f3a46ff74e4a8ca9f365632bfd6fa43f915e6756bc756ee"
applyDefault def "" = def
applyDefault _ str = str
main :: IO ()
main = do
putStrLn $ "Computing universal address for " ++ show pubkey ++ ": " ++ show address
putStrLn ""
putStrLn "Redeem"
putStrLn "======"
putStr "Enter blech32 payment address: "
blech_input <- getLine
putStr "Enter source txid: "
txid_input <- getLine
putStr "Enter source index: "
vout_input <- getLine
putStr $ "Enter input amount (" ++ default_amount ++ "): "
amount_input <- applyDefault default_amount <$> getLine
putStr $ "Enter explicit asset (" ++ default_asset ++ "): "
asset_input <- applyDefault default_asset <$> getLine
putStr $ "Enter fee (" ++ default_fee ++ "): "
fee_input <- applyDefault default_fee <$> getLine
sigtx <- either fail return $ parseInputs blech_input txid_input vout_input amount_input asset_input fee_input
let Just env = primEnv sigtx 0 todo
let Just hash = fastEval (unwrap hashAll_jets) env ()
let whash = fromIntegral (Ty.fromWord256 hash) :: Word256
let msg = bsHash $ sigTag <> sigTag <> encode (commitmentRoot (unwrap hashAll_jets)) <> encode whash
let e = integerHash256 . bsHash $ schnorrTag <> schnorrTag <> encode r <> encode pubkey <> encode msg
let sig = Sig r (fromInteger ((k + priv * e) `mod` order))
let program_sig = program_jets sig
putStrLn $ "Computing signature: " ++ show (bsToHex (encode sig))
putStr "Checking signature: "
case fastEval (unwrap program_sig) env () of
Just () -> putStrLn "ok"
Nothing -> fail "bad signature"
putStrLn "Simplicity Program:"
let witness = runPut . putBitStream . putTermLengthCode $ unwrap program_sig
putStrLn . bsToHex $ witness
putStrLn "Transaction:"
putStrLn . bsToHex . runPut $ putOurTx sigtx witness
parseInputs blech txid_str vout_str amount_str asset_str fee_str = do
(hrp, blechData) <- first show $ blech32Decode (fromString blech)
guardE (Bech32.humanReadablePartToText hrp == fromString "el") "Not an el address"
let blechWord5 = Bech32.dataPartToWords blechData
guardE (not (null blechWord5)) "Empty address"
let sv = fromIntegral . fromEnum $ head blechWord5
(blinding_pubkey, address) <- maybe (Left "Bad Binary Encoding") (Right . BS.splitAt 33)
$ Bech32.dataPartToBytes (Bech32.dataPartFromWords (tail blechWord5))
guardE (inRange (2, 40) (BS.length address)) "Bad address size"
txid_hex <- BS.reverse <$> hexToBS txid_str
asset_hex <- BS.reverse <$> hexToBS asset_str
asset <- Asset . Explicit <$> decode asset_hex
txid <- decode txid_hex
vout <- case reads vout_str of {[(n,[])] -> Right n; _ -> Left "invalid vout" }
amount <- case reads amount_str of {[(n,[])] -> Right n; _ -> Left "invalid amount" }
fee <- case reads fee_str of {[(n,[])] -> Right n; _ -> Left "invalid fee" }
guardE (fee < amount) "Fee too large"
let input = SigTxInput { sigTxiIsPegin = False
, sigTxiPreviousOutpoint = Outpoint { opHash = txid, opIndex = vout }
, sigTxiTxo = UTXO { utxoAsset = asset, utxoAmount = Amount (Explicit amount), utxoScript = todo }
, sigTxiSequence = 0xfffffffd
, sigTxiIssuance = Nothing }
let outputScript = BS.singleton (if 0 == sv then 0 else sv + 0x50) <> BS.singleton (fromIntegral (BS.length address)) <> address
let output = TxOutput { txoAsset = asset, txoAmount = Amount (Explicit (amount - fee)), txoNonce = Nothing, txoScript = BSL.fromStrict outputScript }
let outputFee = TxOutput { txoAsset = asset, txoAmount = Amount (Explicit fee), txoNonce = Nothing, txoScript = mempty }
let inputs = listArray (0, 0) [input]
let outputs = listArray (0, 1) [output, outputFee]
return SigTx { sigTxVersion = 2, sigTxIn = inputs, sigTxOut = outputs, sigTxLock = 0}
hexToBS [] = Right mempty
hexToBS [x] = Left "odd length"
hexToBS (x:y:t) = go (readHex [x,y])
where
go [(n,[])] = mappend (BS.singleton n) <$> hexToBS t
go _ = Left "bad characters"
bsToHex s = BS.unpack s >>= render
where
render n = replicate (2-l) '0' ++ str
where
str = showHex n ""
l = length str
-- simplified to be specific to our transaction.
putOurTx tx witness =
putWord32le (sigTxVersion tx)
>> putWord8 0x01 -- flag for witness
>> putWord8 0x01 -- number of inputs
>> put (sigTxiPreviousOutpoint input)
>> putWord8 0x00 -- sigScript
>> putWord32le (sigTxiSequence input)
>> putWord8 0x02 -- number of outputs
>> putOutput output
>> putOutput fee
>> putWord32le (sigTxLock tx)
>> putWord8 0x00 -- range proof
>> putWord8 0x00 -- range proof
>> putWord8 0x01 -- witness stack size
>> putVarBS witness
>> putWord8 0x00 -- pegin proof
>> putWord8 0x00 -- surjection proof
>> putWord8 0x00 -- range proof
>> putWord8 0x00 -- surjection proof
>> putWord8 0x00 -- range proof
where
[input] = toList (sigTxIn tx)
[output, fee] = toList (sigTxOut tx)
putOutput txo =
put (txoAsset txo)
>> put (txoAmount txo)
>> putNonce (txoNonce txo)
>> putVarBS (BSL.toStrict (txoScript txo))
varLength n | n < 0xfc = putWord8 (fromIntegral n)
| n <= 0xffff = putWord8 0xfd >> putWord16le (fromIntegral n)
| n <= 0xffffffff = putWord8 0xfe >> putWord32le (fromIntegral n)
| n <= 0xffffffffffffffff = putWord8 0xff >> putWord64le (fromIntegral n)
putVarBS bs = varLength (BS.length bs) >> putByteString bs
todo :: a
todo = undefined
-- Below is derived from <https://hackage.haskell.org/package/bech32-1.1.0> and is under Apache-2.0 licence
-- <https://hackage.haskell.org/package/bech32-1.1.0/src/LICENSE>
blech32Decode blech32 = do
guardE (Text.map toUpper blech32 == blech32 || Text.map toLower blech32 == blech32)
Bech32.StringToDecodeHasMixedCase
(hrpUnparsed, dcpUnparsed) <-
maybeToEither Bech32.StringToDecodeMissingSeparatorChar $
splitAtLastOccurrence Bech32.separatorChar $ Text.map toLower blech32
hrp <- first humanReadablePartError $ Bech32.humanReadablePartFromText hrpUnparsed
dcp <- first
(Bech32.StringToDecodeContainsInvalidChars . fmap
(\(Bech32.CharPosition p) ->
Bech32.CharPosition $ p + Text.length hrpUnparsed + separatorLength))
(parseDataWithChecksumPart dcpUnparsed)
guardE (length dcp >= checksumLength) Bech32.StringToDecodeTooShort
guardE (verifyChecksum hrp dcp) $
Bech32.StringToDecodeContainsInvalidChars [] {-$ findErrorPositions hrp dcp -}
let dp = Bech32.dataPartFromWords $ take (length dcp - checksumLength) dcp
return (hrp, dp)
where
checksumLength = 12
separatorLength = 1
verifyChecksum hrp dat = polymod (Bech32.humanReadablePartToWords hrp ++ dat) == 1
polymod :: [Bech32.Word5] -> Word64
polymod values = foldl' go 1 values .&. 0xfffffffffffffff
where
go chk value =
foldl' xor chk' [g | (g, i) <- zip generator [55 ..], testBit chk i]
where
chk' = (chk `shiftL` 5) `xor` (fromIntegral . fromEnum) value
generator =
[ 0x7d52fba40bd886
, 0x5e8dbf1a03950c
, 0x1c3a3c74072a18
, 0x385d72fa0e5139
, 0x7093e5a608865b ]
-- | Parse a data-with-checksum part, checking that each character is part
-- of the supported character set. If one or more characters are not in the
-- supported character set, return the list of illegal character positions.
parseDataWithChecksumPart :: Text.Text -> Either [Bech32.CharPosition] [Bech32.Word5]
parseDataWithChecksumPart dcpUnparsed =
case mapM Bech32.dataCharToWord $ Text.unpack dcpUnparsed of
Nothing -> Left invalidCharPositions
Just dcp -> Right dcp
where
invalidCharPositions =
Bech32.CharPosition . fst <$> filter (isNothing . snd)
([0 .. ] `zip` (Bech32.dataCharToWord <$> Text.unpack dcpUnparsed))
-- | Convert an error encountered while parsing a human-readable part into a
-- general decoding error.
humanReadablePartError Bech32.HumanReadablePartTooLong = Bech32.StringToDecodeContainsInvalidChars [Bech32.CharPosition Bech32.humanReadablePartMaxLength]
humanReadablePartError Bech32.HumanReadablePartTooShort = Bech32.StringToDecodeContainsInvalidChars [Bech32.CharPosition $ Bech32.humanReadablePartMinLength - 1]
humanReadablePartError (Bech32.HumanReadablePartContainsInvalidChars ps) = Bech32.StringToDecodeContainsInvalidChars ps
guardE :: Bool -> e -> Either e ()
guardE b e = if b then Right () else Left e
maybeToEither a (Just b) = Right b
maybeToEither a Nothing = Left a
-- | Splits the given 'Text' into a prefix and a suffix using the last
-- occurrence of the specified separator character as a splitting point.
-- Evaluates to 'Nothing' if the specified 'Text' does not contain the
-- separator character.
splitAtLastOccurrence :: Char -> Text.Text -> Maybe (Text.Text, Text.Text)
splitAtLastOccurrence c s
| isNothing (Text.find (== c) s) = Nothing
| otherwise = pure (prefix, suffix)
where
(prefixPlusOne, suffix) = Text.breakOnEnd (Text.pack [c]) s
prefix = Text.dropEnd 1 prefixPlusOne
Raw
Log of Helper Program
Computing universal address for XOnlyPubKey 86918276961810349294276103416548851884759982251107: "ert1lvh3laj26dphrx296mwuvcujrl6aa0uuecc577gn837s2uv9hjsqsyrhw3l"
Redeem
======
Enter blech32 payment address: el1qqdt7gm0hjwm0ypslyt038vdf7j3cfudtkszsrxm6pxfhtu25qmgjh3s03ftjw822nx4v9a06vl9u42mgrjhaqjzgyxwdp6yle
Enter source txid: 0e8e133dd88282a4f64919e046027d3b40a572c32d0ce6b646a403bed0d51750
Enter source index: 0
Enter input amount (100001000):
Enter explicit asset (b248df0c57c299290f3a46ff74e4a8ca9f365632bfd6fa43f915e6756bc756ee):
Enter fee (1000):
Computing signature: "00000000000000000000003b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63edc8553daec50ea2486737a9139020775bba8def13938d41f4402c2917f3ff77"
Checking signature: ok
Simplicity Program:
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
Transaction:
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
Raw
Redeem Simplicity UTXO
{
"txid": "e540eb71a139da3dcf2926bcd90c2b2b417e5f59e855620c0853eb76415d3d5b",
"hash": "73f14ee301e733292193b33fb7f470ccd97cb33f96c131f84120a524f7b909dd",
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"version": 2,
"size": 1125,
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"scriptPubKey": {
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"hex": "0014c60f8a57271d4a99aac2f5fa67cbcaab681cafd0",
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"confirmations": 1,
"time": 1600265578,
"blocktime": 1600265578
}
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