burnt-explorer (empty) → 0.1.0.0

raw patch · 4 files changed

+322/−0 lines, 4 filesdep +aesondep +basedep +bitcoin-scriptsetup-changed

Dependencies added: aeson, base, bitcoin-script, bytestring, process, scientific

Files

• LICENSE +202/−0
• Main.hs +86/−0
• Setup.hs +2/−0
• burnt-explorer.cabal +32/−0

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@@ -0,0 +1,86 @@+{-# LANGUAGE DeriveGeneric #-}+{-# LANGUAGE OverloadedStrings #-}++module Main (main) where++import Bitcoin.Script (Script)+import qualified Bitcoin.Script as BS+import Data.Aeson+import Data.ByteString.Lazy.Char8 (pack)+import Data.List+import Data.Scientific (Scientific)+import GHC.Generics+import System.Environment+import System.IO+import System.Process++execCommand :: String -> [String] -> IO String+execCommand command args = readProcess "blackcoind" ([command] ++ args) ""++data Block = Block {+  tx :: [String]+  } deriving (Generic, Show)+instance FromJSON Block++data Tx = Tx {+  txid :: String,+  vout :: [VOut],+  time :: Int+  } deriving (Generic, Show)+instance FromJSON Tx++data VOut = VOut {+  n :: Int,+  scriptHex :: String,+  value :: Scientific,+  script :: Script+  } deriving (Show)+instance FromJSON VOut where+  parseJSON (Object o) = do+    n <- o .: "n"+    hex <- ((o .: "scriptPubKey") >>= (.: "hex"))+    value <- o .: "value"+    return (VOut n hex value (BS.decode (pack hex)))++getBlockByNumber :: Int -> IO Block+getBlockByNumber n = do+  -- hPutStr stderr ("\rFetching block " ++ (show n) ++ "…")+  blockJSON <- execCommand "getblockbynumber" [(show n)]+  case decode (pack blockJSON) of+    Just block -> return block++getTxsFromBlock :: Block -> IO [Tx]+getTxsFromBlock block =+  sequence (map getTx (tx block))++getTx :: String -> IO Tx+getTx idx = do+  -- hPutStr stderr ("\rFetching transaction " ++ idx ++ "…")+  txJSON <- execCommand "gettransaction" [idx]+  case decode (pack txJSON) of+    Just tx -> return tx++show_tx_vout :: (Tx, VOut) -> String+show_tx_vout (tx, vout) =+  intercalate " " [txid tx,+                   show (n vout),+                   show (value vout),+                   scriptHex vout,+                   show (BS.scriptOps (script vout))]++processTxs :: [Int] -> IO ()+processTxs [] = return ()+processTxs (height:heights) = do+  block <- getBlockByNumber height+  txs <- getTxsFromBlock block+  let txs_vouts = concat [zip (repeat tx) (vout tx) | tx <- txs]+  let interesting = filter ((elem BS.OP_RETURN) . BS.scriptOps . script . snd) txs_vouts+  mapM_ (putStrLn . show_tx_vout) interesting+  processTxs heights++main :: IO ()+main = do+  hSetBuffering stdout LineBuffering+  args <- getArgs+  let [start, stop] = map read (take 2 args) :: [Int]+  processTxs [start..stop]

@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain

@@ -0,0 +1,32 @@+-- Initial burnt-explorer.cabal generated by cabal init.  For further+-- documentation, see http://haskell.org/cabal/users-guide/++name:                burnt-explorer+version:             0.1.0.0+synopsis:            List OP_RETURN cryptocurrency transaction outputs.+-- description:+license:             Apache-2.0+license-file:        LICENSE+author:              Krzysztof Jurewicz+maintainer:          krzysztof.jurewicz@gmail.com+homepage:            https://gitlab.com/KrzysiekJ/burnt-explorer+description: This unsophisticated application prints all OP_RETURN transaction+             outputs in a given block range.+-- copyright:+category:            Cryptocurrency+build-type:          Simple+-- extra-source-files:+cabal-version:       >=1.10++executable burnt-explorer+  main-is:             Main.hs+  -- other-modules:+  -- other-extensions:+  build-depends:       base >=4.8 && <4.9+                     , process >=1.6 && <1.7+                     , aeson >=1.2 && <1.3+                     , bitcoin-script >=0.9 && <0.10+                     , bytestring >=0.10 && <0.11+                     , scientific >=0.3 && <0.4+  -- hs-source-dirs:+  default-language:    Haskell2010