Experiment on handling bitcoin protocol data through a Javascript API. Draft version.
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The cli.js file mainly acts as an exemple of the underlying data API.
$ npm install
$ node cli.js --help
Options:
-V, --version output the version number
Commands:
hex2dec <hexa> Convert the hexadecimal input string into a decimal number
dec2hex <dec> Convert the decimal input number into an hexadecimal string
swapendian <hexa> Swap the endianess of the hexadeimal input string
varint2dec <hexa> Display the number being stored in the input Varint
dec2varint <dec> Encode a decimal number into a Varint
bits2target <hexa> Compute a target from a bits field input
bits2difficulty <hexa> Compute a difficulty ratio from a bits field input
target2difficulty <dec> Compute a difficulty ratio from a decimal target input
decodetransaction <hexa> Decode a bitcoin transaction into its components
decodeblock <hexa> Decode a bitcoin block into its components$ node cli.js decodetransaction `cat tests/assets/transaction.txt`
raw Hexa 223 0100 0000 01f1 29de 033c 5758 2efb 464e 94ad 438f ff49 3cc4 de44 8172 9b85 9712 3685 8275 c201 0000 006a 4730 4402 2015 5a2e a4a7 02ca df37 052c 87bf e46f 0bd2
4809 759a cff8 d8a7 2069 7961 0e46 f602 2052 b688 b784 fa1d cb1c ffee f89e 7486 344b 814b 0c57 8133 a7b0 bce5 be97 8a92 0801 2103 9151 70b5 8817 0cbc f638 0ef7
01d1 9bd1 8a52 6611 c0c6 9c62 d2c2 9ff6 863d 501a ffff ffff 02cc aec8 1700 0000 0019 76a9 1425 27ce 7f03 0033 0012 d6f9 7672 d9ac b513 0ec4 f888 ac18 411a 0000
0000 0017 a914 0b83 72df fcb3 9943 c7bf ca84 f9c4 0763 b8fa 9a06 8700 0000 00
version Hexa 4 0100 0000
inputs_nb Varint 1 01
input Input 147 f129 de03 3c57 582e fb46 4e94 ad43 8fff 493c c4de 4481 729b 8597 1236 8582 75c2 0100 0000 6a47 3044 0220 155a 2ea4 a702 cadf 3705 2c87 bfe4 6f0b d248 0975 9acf
f8d8 a720 6979 610e 46f6 0220 52b6 88b7 84fa 1dcb 1cff eef8 9e74 8634 4b81 4b0c 5781 33a7 b0bc e5be 978a 9208 0121 0391 5170 b588 170c bcf6 380e f701 d19b d18a
5266 11c0 c69c 62d2 c29f f686 3d50 1aff ffff ff
-prev_trsct Hexa 32 f129 de03 3c57 582e fb46 4e94 ad43 8fff 493c c4de 4481 729b 8597 1236 8582 75c2
-prev_index Hexa 4 0100 0000
-script_len Varint 1 6a
-script_dat Script 106 4730 4402 2015 5a2e a4a7 02ca df37 052c 87bf e46f 0bd2 4809 759a cff8 d8a7 2069 7961 0e46 f602 2052 b688 b784 fa1d cb1c ffee f89e 7486 344b 814b 0c57 8133 a7b0
bce5 be97 8a92 0801 2103 9151 70b5 8817 0cbc f638 0ef7 01d1 9bd1 8a52 6611 c0c6 9c62 d2c2 9ff6 863d 501a
--varint Varint 1 47
--data Hexa 71 3044 0220 155a 2ea4 a702 cadf 3705 2c87 bfe4 6f0b d248 0975 9acf f8d8 a720 6979 610e 46f6 0220 52b6 88b7 84fa 1dcb 1cff eef8 9e74 8634 4b81 4b0c 5781 33a7 b0bc
e5be 978a 9208 01
--varint Varint 1 21
--data Hexa 33 0391 5170 b588 170c bcf6 380e f701 d19b d18a 5266 11c0 c69c 62d2 c29f f686 3d50 1a
-sequence Hexa 4 ffff ffff
outputs_nb Varint 1 02
output Output 34 ccae c817 0000 0000 1976 a914 2527 ce7f 0300 3300 12d6 f976 72d9 acb5 130e c4f8 88ac
-satoshis Hexa 8 ccae c817 0000 0000
-script_len Varint 1 19
-script_dat Script 25 76a9 1425 27ce 7f03 0033 0012 d6f9 7672 d9ac b513 0ec4 f888 ac
--op Op76 1 76
--op OpA9 1 a9
--varint Varint 1 14
--data Hexa 20 2527 ce7f 0300 3300 12d6 f976 72d9 acb5 130e c4f8
--op Op88 1 88
--op OpAc 1 ac
output Output 32 1841 1a00 0000 0000 17a9 140b 8372 dffc b399 43c7 bfca 84f9 c407 63b8 fa9a 0687
-satoshis Hexa 8 1841 1a00 0000 0000
-script_len Varint 1 17
-script_dat Script 23 a914 0b83 72df fcb3 9943 c7bf ca84 f9c4 0763 b8fa 9a06 87
--op OpA9 1 a9
--varint Varint 1 14
--data Hexa 20 0b83 72df fcb3 9943 c7bf ca84 f9c4 0763 b8fa 9a06
--op Op87 1 87
locktime Hexa 4 0000 0000