nodejs로 구현하는 스네이크 코인

출처 : https://gist.github.com/aunyks/8f2c2fd51cc17f342737917e1c2582e2

 

ex1.js 돌아는 간다.

const date = require('date-utils'); var dt = new Date();   var Block = new function(){                 this.index = 0;                 this.timestamp = dt.clone();                 this.data = "data :  Genesis Block"                 this.previous_hash = "0";                 this.hash = crypto.createHash("sha256").update(this.index + this.timestamp + this.data + this.previous_hash).digest("hex"); }; console.log("index : ", Block.index, "timestamp : ", Block.timestamp, "data : ", Block.data, "previous_hash : ", Block.previous_hash, "hash", Block.hash); const next_block = async () => {         try{         Block.index = Block.index+1;         Block.timestamp = dt.clone();         Block.data = "Hey! I'm block " + Block.index;         Block.previous_hash = Block.hash;         Block.hash = crypto.createHash("sha256").update(Block.index + Block.timestamp + Block.data + Block.previous_hash).digest("hex");         }catch (error) { console.log('Task Failure',error);} } var num_of_blocks_to_add = 20; for(var i=0; i<num_of_blocks_to_add; i++){         next_block();         console.log("index : ", Block.index, "timestamp : ", Block.timestamp, "data : ", Block.data, "previous_hash : ", Block.previous_hash, "hash", Block.hash); }

 

 

 

실행결과

root@tkpark-VirtualBox:~/project/myapp/routes# nodejs ex1.js index :  0 timestamp :  2019-01-17T06:14:00.735Z data :  data :  Genesis Block previous_hash :  0 hash 435f39b1283eaaad92378228feb0ff217904cba051828ddbf87eb9049fc269fc index :  1 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 1 previous_hash :  435f39b1283eaaad92378228feb0ff217904cba051828ddbf87eb9049fc269fc hash ea0b1c93cff5ad20bd1b300f339e557747cf92f9cccf18839069b9b34df40241 index :  2 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 2 previous_hash :  ea0b1c93cff5ad20bd1b300f339e557747cf92f9cccf18839069b9b34df40241 hash 27cd8f270c2d09ad2e7409f50ce9dd29d5141cfc1c62dcc2c189f7f7ad394ed1 index :  3 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 3 previous_hash :  27cd8f270c2d09ad2e7409f50ce9dd29d5141cfc1c62dcc2c189f7f7ad394ed1 hash dd12e07c03dd274850ed7071fe6e3009758c56361fcc6d64ca3befed4f683ab7 index :  4 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 4 previous_hash :  dd12e07c03dd274850ed7071fe6e3009758c56361fcc6d64ca3befed4f683ab7 hash efc128e74d5e32f761d11e63851431c84564b315f1ad2cf96e9b610f43a35a74 index :  5 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 5 previous_hash :  efc128e74d5e32f761d11e63851431c84564b315f1ad2cf96e9b610f43a35a74 hash 3bfb7ea0d0ae3183240976de82c100d7f83ce11a91faa6a2b5c79d4a889b525b index :  6 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 6 previous_hash :  3bfb7ea0d0ae3183240976de82c100d7f83ce11a91faa6a2b5c79d4a889b525b hash 93e60df16e258ba4e40407f68a13763db2e741129ef15fa25b5d4c5f98d13f29 index :  7 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 7 previous_hash :  93e60df16e258ba4e40407f68a13763db2e741129ef15fa25b5d4c5f98d13f29 hash dc3bd4fb62dfb15ad82e44b3768e4bc03a2085efc66a20f3542d901bf0da535c index :  8 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 8 previous_hash :  dc3bd4fb62dfb15ad82e44b3768e4bc03a2085efc66a20f3542d901bf0da535c hash 5ac36c5edca409f8d3fe1d7c6323cb6488542d0dfb80390b8211992af9e278dc index :  9 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 9 previous_hash :  5ac36c5edca409f8d3fe1d7c6323cb6488542d0dfb80390b8211992af9e278dc hash df60da5103bb153495e36d26c5fe101ecc7f445a001ca0ec5010ac1e0ca70bf5 index :  10 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 10 previous_hash :  df60da5103bb153495e36d26c5fe101ecc7f445a001ca0ec5010ac1e0ca70bf5 hash 079808737914421f6fbeaaf20764a23fd984eb1b5384c0d64b127bf9b36b69d8 index :  11 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 11 previous_hash :  079808737914421f6fbeaaf20764a23fd984eb1b5384c0d64b127bf9b36b69d8 hash 38e6a98821aa193e9b24d009fdddadab4565388ef93b4bfbf25d3ddbb6e32623 index :  12 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 12 previous_hash :  38e6a98821aa193e9b24d009fdddadab4565388ef93b4bfbf25d3ddbb6e32623 hash f668b9c2521bfb9f4562557501914c6dcbf7dad2fa84c27437be72536c763023 index :  13 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 13 previous_hash :  f668b9c2521bfb9f4562557501914c6dcbf7dad2fa84c27437be72536c763023 hash 48dc2d11c14ad8dbcdc11908185e435162da6f0f653d52bbec3c92b8471d1660 index :  14 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 14 previous_hash :  48dc2d11c14ad8dbcdc11908185e435162da6f0f653d52bbec3c92b8471d1660 hash e1745d4dd8344bc8bd01aefbf59e2a347b0bd9a743bd5e2331c4707763111862 index :  15 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 15 previous_hash :  e1745d4dd8344bc8bd01aefbf59e2a347b0bd9a743bd5e2331c4707763111862 hash fcd3d0e8fd8eb2b90ec2a913085a32de9978cc4c8eb9365dd6fc98f7b6105967 index :  16 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 16 previous_hash :  fcd3d0e8fd8eb2b90ec2a913085a32de9978cc4c8eb9365dd6fc98f7b6105967 hash c545d471f6fc9fd388868b6d0cfdac607df6348f497a907874e71139d91126e9 index :  17 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 17 previous_hash :  c545d471f6fc9fd388868b6d0cfdac607df6348f497a907874e71139d91126e9 hash 4cae02f8716133366633d2ddb3a9bc87b13cee2898eb650f2a0c21f7e550ddb5 index :  18 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 18 previous_hash :  4cae02f8716133366633d2ddb3a9bc87b13cee2898eb650f2a0c21f7e550ddb5 hash e4aa549a98cf6412a4eea651849ef76165dd2bd5d9fee44ac394a58088d6a066 index :  19 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 19 previous_hash :  e4aa549a98cf6412a4eea651849ef76165dd2bd5d9fee44ac394a58088d6a066 hash 1f21c685f6aec8e4e3c5d985873fd00c57241612c7b12f9283b5324113c8b20b index :  20 timestamp :  2019-01-17T06:14:00.735Z data :  Hey! I'm block 20 previous_hash :  1f21c685f6aec8e4e3c5d985873fd00c57241612c7b12f9283b5324113c8b20b hash a780596a78f9bf8570903f65c86bc88fc11dfc9c717379f5694953ce1209d637 root@tkpark-VirtualBox:~/project/myapp/routes#