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10 Commits
master
...
dvf/partii
| Author | SHA1 | Date |
|---|---|---|
Daniel van Flymen
|
d38a86b25f | |
|
Daniel van Flymen
|
8cd2a13747 | |
|
Daniel van Flymen
|
acb84b81e0 | |
|
Daniel van Flymen
|
6f34e4fd7b | |
|
Daniel van Flymen
|
d3298af019 | |
|
Daniel van Flymen
|
fd7cf5e2f9 | |
|
Joel Bixby
|
bfe4de5016 | |
|
Daniel van Flymen
|
ecef87c5de | |
|
Daniel van Flymen
|
5021b69937 | |
|
Daniel van Flymen
|
0df3b84428 |
|
|
@ -102,3 +102,5 @@ ENV/
|
|||
|
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# PyCharm
|
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.idea/
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|
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*.db
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13
Pipfile
13
Pipfile
|
|
@ -1,15 +1,26 @@
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[[source]]
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|
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url = "https://pypi.python.org/simple"
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verify_ssl = true
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name = "pypi"
|
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|
||||
|
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[dev-packages]
|
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|
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|
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|
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[requires]
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|
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python_version = "3.6"
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|
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|
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[packages]
|
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|
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flask = "==0.12.2"
|
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requests = "==2.18.4"
|
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|
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sqlalchemy = "*"
|
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aioodbc = "*"
|
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sqlalchemy-aio = "*"
|
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sanic = "*"
|
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aiohttp = "*"
|
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miniupnpc = "*"
|
||||
|
|
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|||
|
|
@ -1,7 +1,7 @@
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{
|
||||
"_meta": {
|
||||
"hash": {
|
||||
"sha256": "45af71184b5b013f58a8601f7f87c9f0b882afe19f197ce45d6d08e46d615159"
|
||||
"hash_block": {
|
||||
"sha256": "12bb22c1e036c3ea23ae6dfcd3682d0ff1f37b0e7817ba87aa3fe22ceb12ed9d"
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},
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||||
"host-environment-markers": {
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"implementation_name": "cpython",
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|
|
@ -9,12 +9,12 @@
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"os_name": "posix",
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"platform_machine": "x86_64",
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"platform_python_implementation": "CPython",
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"platform_release": "4.10.0-35-generic",
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"platform_system": "Linux",
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"platform_version": "#39~16.04.1-Ubuntu SMP Wed Sep 13 09:02:42 UTC 2017",
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"platform_release": "16.7.0",
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"platform_system": "Darwin",
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"platform_version": "Darwin Kernel Version 16.7.0: Thu Jun 15 17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64",
|
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"python_full_version": "3.6.2",
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||||
"python_version": "3.6",
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"sys_platform": "linux"
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"sys_platform": "darwin"
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},
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||||
"pipfile-spec": 6,
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"requires": {
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|
|
@ -29,12 +29,59 @@
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]
|
||||
},
|
||||
"default": {
|
||||
"aiofiles": {
|
||||
"hashes": [
|
||||
"sha256:25c66ea3872d05d53292a6b3f7fa0f86691512076446d83a505d227b5e76f668",
|
||||
"sha256:852a493a877b73e11823bfd4e8e5ef2610d70d12c9eaed961bcd9124d8de8c10"
|
||||
],
|
||||
"version": "==0.3.2"
|
||||
},
|
||||
"aiohttp": {
|
||||
"hashes": [
|
||||
"sha256:1d3659809cc3cf16007a43df3c3af34a9ad8d7594bfcd651ef2d29ff21d015e3",
|
||||
"sha256:18c93827f604e3830535423f22bfaa180d7ba10baa5959a2077f2e29b320138d",
|
||||
"sha256:080c82112d93fe117a2f605d5a102191ae7fc52349c53cf6676efbfb8bd2d369",
|
||||
"sha256:a1c29fdc56e040c3c67a9fa6da7e05382d5216d1ead9ae8a4fb772a1abb0452a",
|
||||
"sha256:d8f546159ae453572c3b87d88652705c4516dfee1ade8673b47f544b2bf1b33d",
|
||||
"sha256:03085220b503bb2cf2d288e1b36cf6dcbf84fcfed550e7c73bad429a6e528084",
|
||||
"sha256:00e40b1261bdb6a1e2b986e610be8a2bb0699ce5a261f78c88d761c726e0af10",
|
||||
"sha256:fcec0a4878c27f04bf62de4b76d51f9583d45031317dd020088d2e258210fcc2",
|
||||
"sha256:52b180767e1b75ff071f316a52946fb311ba4183cb6981201fa7843611cf42e4",
|
||||
"sha256:1fbc4701639ca383dc103840fb478ce726b84c51de8d575c02b740bcb2f60262",
|
||||
"sha256:9d2e10768bca6ff8392df596754adbffee39ab4243d2536f955f9db145685cbe",
|
||||
"sha256:3ee498748106c2f8ce937ea27c05d8862118ce055ee3d074b383e927572b51b6",
|
||||
"sha256:dc922785064187c45c71eda21d7eb87c7a0b2d867e0d7c9ffc2ea2a37dcca608",
|
||||
"sha256:0415ca37ca047d4b5c2938da024abe4893fe54227b7ad36f98fb169fff4767a3",
|
||||
"sha256:08715cc8d0ae00679b7c131804ae92aacc31fd0078dd0d78c309c043a4f8aa57",
|
||||
"sha256:ed8fb8c9b16459895c6949215592df6119961a9999ade84b66594456883d2215",
|
||||
"sha256:6b2c62e6d54a08c7e4b8b00251d3c877bdf10ceec22c7ecc5d94de64d75fe699",
|
||||
"sha256:f81850cf4707a2d3d85fcb9c85c091a0df66bf4a67197530c5a4f454b8d1d950",
|
||||
"sha256:5a1c7c890ac13dd05763e3617261f528fedf3255d72ba8c41e97f7de72f3d8b6",
|
||||
"sha256:65d623d32a40826be88ecafe5a49fd0af3092b2bf7e1171aec1d3e7868c969c1",
|
||||
"sha256:222634adcdcfda1aefafff198415df77946384d10696619f1b163cb36d03bc82",
|
||||
"sha256:fe294df38e9c67374263d783a7a29c79372030f5962bd5734fa51c6f4bbfee3b"
|
||||
],
|
||||
"version": "==2.3.7"
|
||||
},
|
||||
"aioodbc": {
|
||||
"hashes": [
|
||||
"sha256:1a859a4ac7de85bb7a743e22da3942fb046c18fed27fb68bb2ac01750ed259a7"
|
||||
],
|
||||
"version": "==0.2.0"
|
||||
},
|
||||
"async-timeout": {
|
||||
"hashes": [
|
||||
"sha256:d3a195a827b0f4068d1616ae2da04aac62e365d14f2b13dbc071f9feed9db4e2",
|
||||
"sha256:c17d8ac2d735d59aa62737d76f2787a6c938f5a944ecf768a8c0ab70b0dea566"
|
||||
],
|
||||
"version": "==2.0.0"
|
||||
},
|
||||
"certifi": {
|
||||
"hashes": [
|
||||
"sha256:54a07c09c586b0e4c619f02a5e94e36619da8e2b053e20f594348c0611803704",
|
||||
"sha256:40523d2efb60523e113b44602298f0960e900388cf3bb6043f645cf57ea9e3f5"
|
||||
"sha256:244be0d93b71e93fc0a0a479862051414d0e00e16435707e5bf5000f92e04694",
|
||||
"sha256:5ec74291ca1136b40f0379e1128ff80e866597e4e2c1e755739a913bbc3613c0"
|
||||
],
|
||||
"version": "==2017.7.27.1"
|
||||
"version": "==2017.11.5"
|
||||
},
|
||||
"chardet": {
|
||||
"hashes": [
|
||||
|
|
@ -57,6 +104,12 @@
|
|||
],
|
||||
"version": "==0.12.2"
|
||||
},
|
||||
"httptools": {
|
||||
"hashes": [
|
||||
"sha256:f50dcb27178416c3a4113e9e1b392be5d1ff56ae1e474fe80869ed8530505e4c"
|
||||
],
|
||||
"version": "==0.0.10"
|
||||
},
|
||||
"idna": {
|
||||
"hashes": [
|
||||
"sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4",
|
||||
|
|
@ -72,10 +125,10 @@
|
|||
},
|
||||
"jinja2": {
|
||||
"hashes": [
|
||||
"sha256:2231bace0dfd8d2bf1e5d7e41239c06c9e0ded46e70cc1094a0aa64b0afeb054",
|
||||
"sha256:ddaa01a212cd6d641401cb01b605f4a4d9f37bfc93043d7f760ec70fb99ff9ff"
|
||||
"sha256:74c935a1b8bb9a3947c50a54766a969d4846290e1e788ea44c1392163723c3bd",
|
||||
"sha256:f84be1bb0040caca4cea721fcbbbbd61f9be9464ca236387158b0feea01914a4"
|
||||
],
|
||||
"version": "==2.9.6"
|
||||
"version": "==2.10"
|
||||
},
|
||||
"markupsafe": {
|
||||
"hashes": [
|
||||
|
|
@ -83,6 +136,64 @@
|
|||
],
|
||||
"version": "==1.0"
|
||||
},
|
||||
"miniupnpc": {
|
||||
"hashes": [
|
||||
"sha256:7ea46c93486fe1bdb31f0e0c2d911d224fce70bf5ea120e4295d647dfe274931"
|
||||
],
|
||||
"version": "==2.0.2"
|
||||
},
|
||||
"multidict": {
|
||||
"hashes": [
|
||||
"sha256:d12dfcff45b5c0eb3d586289cbf928012e75f93f10f4b9d7af903acb07b3c226",
|
||||
"sha256:f7deb65a184cbe757faaf4c6d2b8f203cb1a11dd44603a34d7befc343253d5bf",
|
||||
"sha256:80ad69b8330135b52a6da7a1f0ab6a278025bb72ea08768966785c829f515a6f",
|
||||
"sha256:3261b631cd6d079e6a20def3306b433794f800ea896dce4f1d5e833ad9bf6f26",
|
||||
"sha256:80e2bd17ea98fe77867771e1ee03433a54fa492a8413966a6caa766bdd6d6e62",
|
||||
"sha256:8eb59892040198741944eafca0c34be4da6b58be7fddf6e491a2d9e7e1767548",
|
||||
"sha256:24ec0d645ca70981e1c84e97e48c874b47f4970a173c8c751be9c213a8658e40",
|
||||
"sha256:167558cfb7c43077b3d8602142109f2b52fae0841a7ff97eb0a7443db199f303",
|
||||
"sha256:80abc93d197e24fb7c5aa5a8be3eacbcbc7115a2ff64e46162a4c2b46cd2f75a",
|
||||
"sha256:ff2b92a41df2e4c5cafaefb782469f3e6053ed00026d75a398521096192d0408",
|
||||
"sha256:5cfb63f0ddfa86ce6e80eee64e4fe886f9dfdb6dbbd724997bccb66513b0e29f",
|
||||
"sha256:50dac1151e34974b04419073ee9726f4180c6daf3454fd4af258824a19ad8c1d",
|
||||
"sha256:ebf1ba2af62dbaa37cf3db346830bb43d40d05a5f1f1966888a620f9b795e7c7",
|
||||
"sha256:3f513f3bf933d7cb6f5741f6676d4fac1e96aa634161c071974f9bb86a7bbac9",
|
||||
"sha256:ef6dc6e2d51b6058aa62cdd44dbf02c250c19eee6ff0065babc0ac126b068d43",
|
||||
"sha256:90dc3b8fefc58a865d64957f8f901d724250ba2a40e02f49d0df0103e96f5afa",
|
||||
"sha256:70630854b820d73ae102440123df38c983d77cd4ae444f3930a6bb6bbda87b76",
|
||||
"sha256:faf2b6447521d2075d03fb5e7c5467bac68f67df1c69e034ebca3afb6b3c619d",
|
||||
"sha256:eb7d5d39463137726138fc14c8458131136b8f4b06ba65f1cecd7aa6abe91df1",
|
||||
"sha256:fa04df1503fae7045883c57db47ba0c07de2ebe4a91c3e64d56f20d3d99e5dc8",
|
||||
"sha256:bce16633f3ee88863e4c9bcd7e037a6133c56fd9e7e7c0776bbaeeddcf154ac4",
|
||||
"sha256:f82e61c7408ed0dce1862100db55595481911f159d6ddec0b375d35b6449509b"
|
||||
],
|
||||
"version": "==3.3.2"
|
||||
},
|
||||
"pyodbc": {
|
||||
"hashes": [
|
||||
"sha256:364621505a7488b58ac3d5ac53183425f0ba6f333fdc0500492d08485431d04c",
|
||||
"sha256:f20474fcf5f359d6079e215b196af3a3667c73712437f20cb89d72819ac7d37d",
|
||||
"sha256:ec84f3c7b13199455a42ae130815855be7a4c18ac4cf01f005785890cfcf52e5",
|
||||
"sha256:c0f1e7b814cbdaa0215ff72a17e3cb3f4da77c65806b3895bb40f3859822a57c",
|
||||
"sha256:75c31fcfa8f5f1d09485817488de60d6ebe8819593c83beacf625dd281fbe406",
|
||||
"sha256:74cd2dff259eaf3da79c5beed2818f2cb1c0d15212f3b6a02e08053f5de0e7fc",
|
||||
"sha256:3f06a002c38ad241e072bc6449c9961afcb37bbbb9feeda20f90a9d67b02fe14",
|
||||
"sha256:7139faaa8f1396883f275e7ada88e729b031f9efae335d0a9ea26e84e2eb11eb",
|
||||
"sha256:1242b5f045249835b8473565882804bb09aa54cc1c5bad24ef6cd8b7af4197d0",
|
||||
"sha256:d40b122108ae48d17531c9ba844168c1c82d76247ef22063d3f087e30fa1dde2",
|
||||
"sha256:3f119da1db79576ce15d36b8c31dc7ca1732ada47a6bfd0de0993c68440b26a0",
|
||||
"sha256:ecf9a63cd5babce5547ac1b4b8472d6dfec42ca009cd3d8c8b2777b2b4a2e2a8",
|
||||
"sha256:9655f84ca9e5cb2dfffff705601017420c840d55271ba62dd44f05383eff0329"
|
||||
],
|
||||
"version": "==4.0.21"
|
||||
},
|
||||
"represent": {
|
||||
"hashes": [
|
||||
"sha256:f599094a66ec04455bb1555f3a65c78449f647a1a1bcd513775cfa64c8067400",
|
||||
"sha256:9c12c1c60b8616f97855d3a37ea4ec60e3d5d463965a6a29b80d0b794ad4f0d8"
|
||||
],
|
||||
"version": "==1.5.1"
|
||||
},
|
||||
"requests": {
|
||||
"hashes": [
|
||||
"sha256:6a1b267aa90cac58ac3a765d067950e7dbbf75b1da07e895d1f594193a40a38b",
|
||||
|
|
@ -90,6 +201,39 @@
|
|||
],
|
||||
"version": "==2.18.4"
|
||||
},
|
||||
"sanic": {
|
||||
"hashes": [
|
||||
"sha256:18a3bd729093ac93a245849c44045c505a11e6d36da5bf231cb986bfb1e3c14c",
|
||||
"sha256:22b1a6f1dc55db8a136335cb0961afa95040ca78aa8c78425a40d91e8618e60e"
|
||||
],
|
||||
"version": "==0.7.0"
|
||||
},
|
||||
"six": {
|
||||
"hashes": [
|
||||
"sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb",
|
||||
"sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"
|
||||
],
|
||||
"version": "==1.11.0"
|
||||
},
|
||||
"sqlalchemy": {
|
||||
"hashes": [
|
||||
"sha256:7dda3e0b1b12215e3bb05368d1abbf7d747112a43738e0a4e6deb466b83fd88e"
|
||||
],
|
||||
"version": "==1.2.0"
|
||||
},
|
||||
"sqlalchemy-aio": {
|
||||
"hashes": [
|
||||
"sha256:2c2a46504c999b4ae5751c90a86aa78cee8cc216f9d432264fb850ffe2d78965",
|
||||
"sha256:736ab30fed217bc9602824b8b7daafcd52e0e19eb4cf07a940d82de5981877e8"
|
||||
],
|
||||
"version": "==0.11.0"
|
||||
},
|
||||
"ujson": {
|
||||
"hashes": [
|
||||
"sha256:f66073e5506e91d204ab0c614a148d5aa938bdbf104751be66f8ad7a222f5f86"
|
||||
],
|
||||
"version": "==1.35"
|
||||
},
|
||||
"urllib3": {
|
||||
"hashes": [
|
||||
"sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b",
|
||||
|
|
@ -97,12 +241,63 @@
|
|||
],
|
||||
"version": "==1.22"
|
||||
},
|
||||
"uvloop": {
|
||||
"hashes": [
|
||||
"sha256:01cf7199728867f406ba5af78cc47c80acd663ccc52cae105e737a997f1b2bca",
|
||||
"sha256:e7c871ba3edd5fcf2afb756de88a9a65245070161e24f75abe79c0a241bb8c76",
|
||||
"sha256:b057ef2b0d0162c1ef257f43a95f59bfec37ee9a75cc5412d6b7f9ac6d1d69cb",
|
||||
"sha256:89c3bfaad77625490c42a6b99af1879234767ab0c31dd193486a909506e5e549",
|
||||
"sha256:68574150720a380509a3409bf2941be0199cfdacff144a97502fb29c250ba927",
|
||||
"sha256:7fba5f390db607b2f026bc598df6b2a2a9e062bffe82910b5ffe2b88560135e5",
|
||||
"sha256:7ee14835a75c72227d3f8a3f370519a3106a6f02e5453f275f16437ebdb92953"
|
||||
],
|
||||
"version": "==0.9.1"
|
||||
},
|
||||
"websockets": {
|
||||
"hashes": [
|
||||
"sha256:f5192da704535a7cbf76d6e99c1ec4af7e8d1288252bf5a2385d414509ded0cf",
|
||||
"sha256:0c31bc832d529dc7583d324eb6c836a4f362032a1902723c112cf57883488d8c",
|
||||
"sha256:da7610a017f5343fdf765f4e0eb6fd0dfd08264ca1565212b110836d9367fc9c",
|
||||
"sha256:fd81af8cf3e69f9a97f3a6c0623a0527de0f922c2df725f00cd7646d478af632",
|
||||
"sha256:3d425ae081fb4ba1eef9ecf30472ffd79f8e868297ccc7a47993c96dbf2a819c",
|
||||
"sha256:ebdd4f18fe7e3bea9bd3bf446b0f4117739478caa2c76e4f0fb72cc45b03cbd7",
|
||||
"sha256:3859ca16c229ddb0fa21c5090e4efcb037c08ce69b0c1dfed6122c3f98cd0c22",
|
||||
"sha256:d1a0572b6edb22c9208e3e5381064e09d287d2a915f90233fef994ee7a14a935",
|
||||
"sha256:80188abdadd23edaaea05ce761dc9a2e1df31a74a0533967f0dcd9560c85add0",
|
||||
"sha256:fecf51c13195c416c22422353b306dddb9c752e4b80b21e0fa1fccbe38246677",
|
||||
"sha256:367ff945bc0950ad9634591e2afe50bf2222bc4fad1088a386c4bb700888026e",
|
||||
"sha256:6df87698022aef2596bffdfecc96d656db59c8d719708c8a471daa815ee61656",
|
||||
"sha256:341824d8c9ad53fc43cca3fa9407f294125fa258592f7676640396501448e57e",
|
||||
"sha256:64896a6b3368c959b8096b655e46f03dfa65b96745249f374bd6a35705cc3489",
|
||||
"sha256:1f3e5a52cab6daa3d432c7b0de0a14109be39d2bfaad033ee5de4a3d3e11dcdf",
|
||||
"sha256:da4d4fbe059b0453e726d6d993760065d69b823a27efc3040402a6fcfe6a1ed9"
|
||||
],
|
||||
"version": "==4.0.1"
|
||||
},
|
||||
"werkzeug": {
|
||||
"hashes": [
|
||||
"sha256:e8549c143af3ce6559699a01e26fa4174f4c591dbee0a499f3cd4c3781cdec3d",
|
||||
"sha256:903a7b87b74635244548b30d30db4c8947fe64c5198f58899ddcd3a13c23bb26"
|
||||
"sha256:f3000aa146ce8a9da8ca3e978e0e931c2a58eb56c323a5efb6b4307f7832b549",
|
||||
"sha256:6246e5fc98a505824113fb6aca993d45ea284a2bcffdc2c65d0c538e53e4abd3"
|
||||
],
|
||||
"version": "==0.12.2"
|
||||
"version": "==0.13"
|
||||
},
|
||||
"yarl": {
|
||||
"hashes": [
|
||||
"sha256:55dfe4a952fddf3e32c08e3fe004a86b77963d95a4b36c8bdb5acc68960c4767",
|
||||
"sha256:5970e4deb2ad23ececbaca8e20e7421d66d84f9a8978eb7d469b931f0a7c5bfa",
|
||||
"sha256:6594f27c81012c9bcad46693b599ae3cb6086ef0c32af68160e599e69b7ce2e6",
|
||||
"sha256:6f662ff050945163fc70f6c4361807068f66b248d60d7f7d2fe35c6dce7e1490",
|
||||
"sha256:3c90b8b89d9e163fb114f8e491f85bc44aacc528d9ade3cb4a210a2340282b15",
|
||||
"sha256:c1f6aa4f6647380dfee6a2f560079d2c2b105a6d7ab7c1ad83bc811fc0df7bb2",
|
||||
"sha256:e6c302aa976504e4cf299b5ae5385677b77f84b71f84aeddcc56b8841743b27b",
|
||||
"sha256:e04c26c4fa6717ceeada129665cf19f630ddffb2df692bc5d51595b97227a5cf",
|
||||
"sha256:15ab97fd75bd531ba6e3e2639313db177ba44ec3a68bdd3f531904782872dfe9",
|
||||
"sha256:b3b2bfd039b6a89382ad46a20647286b012db34f63e00e39e185cb4df566121f",
|
||||
"sha256:620f76a2452f502333392c86074046af6fde72b54065e43530e8417d689b1824",
|
||||
"sha256:7a2001e180f169f762f9322066685f94808db5722ce7c4827a248d3f50d88e61",
|
||||
"sha256:47622985ecd9b15335d65c1acd54aeb3ba449e6d09b36e37ecfe334c7e7b8d0b"
|
||||
],
|
||||
"version": "==0.16.0"
|
||||
}
|
||||
},
|
||||
"develop": {}
|
||||
|
|
|
|||
267
blockchain.py
267
blockchain.py
|
|
@ -1,35 +1,43 @@
|
|||
import hashlib
|
||||
import json
|
||||
from time import time
|
||||
from urllib.parse import urlparse
|
||||
from uuid import uuid4
|
||||
import logging
|
||||
from datetime import datetime
|
||||
|
||||
import requests
|
||||
from flask import Flask, jsonify, request
|
||||
from database import Block, db
|
||||
from helpers import hash_block
|
||||
|
||||
|
||||
logger = logging.getLogger('root.blockchain')
|
||||
|
||||
|
||||
class Blockchain:
|
||||
def __init__(self):
|
||||
self.current_transactions = []
|
||||
self.chain = []
|
||||
self.nodes = set()
|
||||
self.difficulty = 4
|
||||
|
||||
# Create the genesis block
|
||||
self.new_block(previous_hash='1', proof=100)
|
||||
# Create the genesis block if it doesn't exist
|
||||
if not self.last_block:
|
||||
block = self.build_block()
|
||||
block['hash'] = hash_block(block)
|
||||
self.save_block(block)
|
||||
|
||||
def register_node(self, address):
|
||||
logger.info("✨ Created genesis block")
|
||||
|
||||
logger.info("Blockchain Initiated")
|
||||
|
||||
@staticmethod
|
||||
def get_blocks(height=0):
|
||||
"""
|
||||
Add a new node to the list of nodes
|
||||
Returns all blocks from a given height
|
||||
|
||||
:param address: Address of node. Eg. 'http://192.168.0.5:5000'
|
||||
:param height: <int> The height from which to return blocks
|
||||
:return:
|
||||
"""
|
||||
|
||||
parsed_url = urlparse(address)
|
||||
self.nodes.add(parsed_url.netloc)
|
||||
blocks = db.query(Block).filter(Block.height >= height).all()
|
||||
return [block.to_dict() for block in blocks]
|
||||
|
||||
def valid_chain(self, chain):
|
||||
"""
|
||||
Determine if a given blockchain is valid
|
||||
Determines if a given blockchain is valid
|
||||
|
||||
:param chain: A blockchain
|
||||
:return: True if valid, False if not
|
||||
|
|
@ -40,11 +48,9 @@ class Blockchain:
|
|||
|
||||
while current_index < len(chain):
|
||||
block = chain[current_index]
|
||||
print(f'{last_block}')
|
||||
print(f'{block}')
|
||||
print("\n-----------\n")
|
||||
# Check that the hash of the block is correct
|
||||
if block['previous_hash'] != self.hash(last_block):
|
||||
|
||||
# Check that the hash_block of the block is correct
|
||||
if block['previous_hash'] != self.hash_block(last_block):
|
||||
return False
|
||||
|
||||
# Check that the Proof of Work is correct
|
||||
|
|
@ -56,63 +62,35 @@ class Blockchain:
|
|||
|
||||
return True
|
||||
|
||||
def resolve_conflicts(self):
|
||||
"""
|
||||
This is our consensus algorithm, it resolves conflicts
|
||||
by replacing our chain with the longest one in the network.
|
||||
|
||||
:return: True if our chain was replaced, False if not
|
||||
"""
|
||||
|
||||
neighbours = self.nodes
|
||||
new_chain = None
|
||||
|
||||
# We're only looking for chains longer than ours
|
||||
max_length = len(self.chain)
|
||||
|
||||
# Grab and verify the chains from all the nodes in our network
|
||||
for node in neighbours:
|
||||
response = requests.get(f'http://{node}/chain')
|
||||
|
||||
if response.status_code == 200:
|
||||
length = response.json()['length']
|
||||
chain = response.json()['chain']
|
||||
|
||||
# Check if the length is longer and the chain is valid
|
||||
if length > max_length and self.valid_chain(chain):
|
||||
max_length = length
|
||||
new_chain = chain
|
||||
|
||||
# Replace our chain if we discovered a new, valid chain longer than ours
|
||||
if new_chain:
|
||||
self.chain = new_chain
|
||||
return True
|
||||
|
||||
return False
|
||||
|
||||
def new_block(self, proof, previous_hash):
|
||||
def build_block(self):
|
||||
"""
|
||||
Create a new Block in the Blockchain
|
||||
|
||||
:param proof: The proof given by the Proof of Work algorithm
|
||||
:param previous_hash: Hash of previous Block
|
||||
:return: New Block
|
||||
"""
|
||||
last_block = self.last_block
|
||||
|
||||
block = {
|
||||
'index': len(self.chain) + 1,
|
||||
'timestamp': time(),
|
||||
return {
|
||||
'height': last_block.height + 1 if last_block else 0,
|
||||
'timestamp': datetime.utcnow(),
|
||||
'transactions': self.current_transactions,
|
||||
'proof': proof,
|
||||
'previous_hash': previous_hash or self.hash(self.chain[-1]),
|
||||
'previous_hash': last_block.hash if last_block else 0,
|
||||
'proof': -1,
|
||||
}
|
||||
|
||||
def save_block(self, block_dict):
|
||||
"""
|
||||
Saves Block to the database and resets outstanding transactions
|
||||
|
||||
:param block_dict: A dictionary representation of a Block
|
||||
:return:
|
||||
"""
|
||||
print(block_dict)
|
||||
block = Block(**block_dict)
|
||||
db.add(block)
|
||||
db.commit()
|
||||
|
||||
# Reset the current list of transactions
|
||||
self.current_transactions = []
|
||||
|
||||
self.chain.append(block)
|
||||
return block
|
||||
|
||||
def new_transaction(self, sender, recipient, amount):
|
||||
"""
|
||||
Creates a new transaction to go into the next mined Block
|
||||
|
|
@ -132,154 +110,9 @@ class Blockchain:
|
|||
|
||||
@property
|
||||
def last_block(self):
|
||||
return self.chain[-1]
|
||||
|
||||
@staticmethod
|
||||
def hash(block):
|
||||
"""
|
||||
Creates a SHA-256 hash of a Block
|
||||
Returns the last block in the Blockchain (greatest height)
|
||||
|
||||
:param block: Block
|
||||
:return: <Block>
|
||||
"""
|
||||
|
||||
# We must make sure that the Dictionary is Ordered, or we'll have inconsistent hashes
|
||||
block_string = json.dumps(block, sort_keys=True).encode()
|
||||
return hashlib.sha256(block_string).hexdigest()
|
||||
|
||||
def proof_of_work(self, last_proof):
|
||||
"""
|
||||
Simple Proof of Work Algorithm:
|
||||
- Find a number p' such that hash(pp') contains leading 4 zeroes, where p is the previous p'
|
||||
- p is the previous proof, and p' is the new proof
|
||||
"""
|
||||
|
||||
proof = 0
|
||||
while self.valid_proof(last_proof, proof) is False:
|
||||
proof += 1
|
||||
|
||||
return proof
|
||||
|
||||
@staticmethod
|
||||
def valid_proof(last_proof, proof):
|
||||
"""
|
||||
Validates the Proof
|
||||
|
||||
:param last_proof: Previous Proof
|
||||
:param proof: Current Proof
|
||||
:return: True if correct, False if not.
|
||||
"""
|
||||
|
||||
guess = f'{last_proof}{proof}'.encode()
|
||||
guess_hash = hashlib.sha256(guess).hexdigest()
|
||||
return guess_hash[:4] == "0000"
|
||||
|
||||
|
||||
# Instantiate the Node
|
||||
app = Flask(__name__)
|
||||
|
||||
# Generate a globally unique address for this node
|
||||
node_identifier = str(uuid4()).replace('-', '')
|
||||
|
||||
# Instantiate the Blockchain
|
||||
blockchain = Blockchain()
|
||||
|
||||
|
||||
@app.route('/mine', methods=['GET'])
|
||||
def mine():
|
||||
# We run the proof of work algorithm to get the next proof...
|
||||
last_block = blockchain.last_block
|
||||
last_proof = last_block['proof']
|
||||
proof = blockchain.proof_of_work(last_proof)
|
||||
|
||||
# We must receive a reward for finding the proof.
|
||||
# The sender is "0" to signify that this node has mined a new coin.
|
||||
blockchain.new_transaction(
|
||||
sender="0",
|
||||
recipient=node_identifier,
|
||||
amount=1,
|
||||
)
|
||||
|
||||
# Forge the new Block by adding it to the chain
|
||||
previous_hash = blockchain.hash(last_block)
|
||||
block = blockchain.new_block(proof, previous_hash)
|
||||
|
||||
response = {
|
||||
'message': "New Block Forged",
|
||||
'index': block['index'],
|
||||
'transactions': block['transactions'],
|
||||
'proof': block['proof'],
|
||||
'previous_hash': block['previous_hash'],
|
||||
}
|
||||
return jsonify(response), 200
|
||||
|
||||
|
||||
@app.route('/transactions/new', methods=['POST'])
|
||||
def new_transaction():
|
||||
values = request.get_json()
|
||||
|
||||
# Check that the required fields are in the POST'ed data
|
||||
required = ['sender', 'recipient', 'amount']
|
||||
if not all(k in values for k in required):
|
||||
return 'Missing values', 400
|
||||
|
||||
# Create a new Transaction
|
||||
index = blockchain.new_transaction(values['sender'], values['recipient'], values['amount'])
|
||||
|
||||
response = {'message': f'Transaction will be added to Block {index}'}
|
||||
return jsonify(response), 201
|
||||
|
||||
|
||||
@app.route('/chain', methods=['GET'])
|
||||
def full_chain():
|
||||
response = {
|
||||
'chain': blockchain.chain,
|
||||
'length': len(blockchain.chain),
|
||||
}
|
||||
return jsonify(response), 200
|
||||
|
||||
|
||||
@app.route('/nodes/register', methods=['POST'])
|
||||
def register_nodes():
|
||||
values = request.get_json()
|
||||
|
||||
nodes = values.get('nodes')
|
||||
if nodes is None:
|
||||
return "Error: Please supply a valid list of nodes", 400
|
||||
|
||||
for node in nodes:
|
||||
blockchain.register_node(node)
|
||||
|
||||
response = {
|
||||
'message': 'New nodes have been added',
|
||||
'total_nodes': list(blockchain.nodes),
|
||||
}
|
||||
return jsonify(response), 201
|
||||
|
||||
|
||||
@app.route('/nodes/resolve', methods=['GET'])
|
||||
def consensus():
|
||||
replaced = blockchain.resolve_conflicts()
|
||||
|
||||
if replaced:
|
||||
response = {
|
||||
'message': 'Our chain was replaced',
|
||||
'new_chain': blockchain.chain
|
||||
}
|
||||
else:
|
||||
response = {
|
||||
'message': 'Our chain is authoritative',
|
||||
'chain': blockchain.chain
|
||||
}
|
||||
|
||||
return jsonify(response), 200
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
from argparse import ArgumentParser
|
||||
|
||||
parser = ArgumentParser()
|
||||
parser.add_argument('-p', '--port', default=5000, type=int, help='port to listen on')
|
||||
args = parser.parse_args()
|
||||
port = args.port
|
||||
|
||||
app.run(host='0.0.0.0', port=port)
|
||||
return db.query(Block).order_by(Block.height.desc()).first()
|
||||
|
|
|
|||
|
|
@ -1,10 +0,0 @@
|
|||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<configuration>
|
||||
<startup>
|
||||
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1"/>
|
||||
</startup>
|
||||
<appSettings>
|
||||
<add key="host" value="localhost" />
|
||||
<add key="port" value="12345" />
|
||||
</appSettings>
|
||||
</configuration>
|
||||
|
|
@ -1,63 +0,0 @@
|
|||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
|
||||
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
|
||||
<PropertyGroup>
|
||||
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
|
||||
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
|
||||
<ProjectGuid>{D0C795A0-6F20-4A8E-BE44-801678754DA4}</ProjectGuid>
|
||||
<OutputType>Exe</OutputType>
|
||||
<RootNamespace>BlockChainDemo.Console</RootNamespace>
|
||||
<AssemblyName>BlockChainDemo.Console</AssemblyName>
|
||||
<TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
|
||||
<FileAlignment>512</FileAlignment>
|
||||
<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
|
||||
<SccProjectName>SAK</SccProjectName>
|
||||
<SccLocalPath>SAK</SccLocalPath>
|
||||
<SccAuxPath>SAK</SccAuxPath>
|
||||
<SccProvider>SAK</SccProvider>
|
||||
<TargetFrameworkProfile />
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
|
||||
<PlatformTarget>AnyCPU</PlatformTarget>
|
||||
<DebugSymbols>true</DebugSymbols>
|
||||
<DebugType>full</DebugType>
|
||||
<Optimize>false</Optimize>
|
||||
<OutputPath>bin\Debug\</OutputPath>
|
||||
<DefineConstants>DEBUG;TRACE</DefineConstants>
|
||||
<ErrorReport>prompt</ErrorReport>
|
||||
<WarningLevel>4</WarningLevel>
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
|
||||
<PlatformTarget>AnyCPU</PlatformTarget>
|
||||
<DebugType>pdbonly</DebugType>
|
||||
<Optimize>true</Optimize>
|
||||
<OutputPath>bin\Release\</OutputPath>
|
||||
<DefineConstants>TRACE</DefineConstants>
|
||||
<ErrorReport>prompt</ErrorReport>
|
||||
<WarningLevel>4</WarningLevel>
|
||||
</PropertyGroup>
|
||||
<ItemGroup>
|
||||
<Reference Include="System" />
|
||||
<Reference Include="System.Core" />
|
||||
<Reference Include="System.Xml.Linq" />
|
||||
<Reference Include="System.Data.DataSetExtensions" />
|
||||
<Reference Include="Microsoft.CSharp" />
|
||||
<Reference Include="System.Data" />
|
||||
<Reference Include="System.Net.Http" />
|
||||
<Reference Include="System.Xml" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<Compile Include="Program.cs" />
|
||||
<Compile Include="Properties\AssemblyInfo.cs" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<None Include="App.config" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<ProjectReference Include="..\BlockChain\BlockChain.csproj">
|
||||
<Project>{e06fc4ce-77d0-4a64-94a6-32a08920e481}</Project>
|
||||
<Name>BlockChain</Name>
|
||||
</ProjectReference>
|
||||
</ItemGroup>
|
||||
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
|
||||
</Project>
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
namespace BlockChainDemo.Console
|
||||
{
|
||||
class Program
|
||||
{
|
||||
static void Main(string[] args)
|
||||
{
|
||||
var chain = new BlockChain();
|
||||
var server = new WebServer(chain);
|
||||
System.Console.Read();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,36 +0,0 @@
|
|||
using System.Reflection;
|
||||
using System.Runtime.CompilerServices;
|
||||
using System.Runtime.InteropServices;
|
||||
|
||||
// General Information about an assembly is controlled through the following
|
||||
// set of attributes. Change these attribute values to modify the information
|
||||
// associated with an assembly.
|
||||
[assembly: AssemblyTitle("BlockChain.Console")]
|
||||
[assembly: AssemblyDescription("")]
|
||||
[assembly: AssemblyConfiguration("")]
|
||||
[assembly: AssemblyCompany("")]
|
||||
[assembly: AssemblyProduct("BlockChain.Console")]
|
||||
[assembly: AssemblyCopyright("Copyright © 2017")]
|
||||
[assembly: AssemblyTrademark("")]
|
||||
[assembly: AssemblyCulture("")]
|
||||
|
||||
// Setting ComVisible to false makes the types in this assembly not visible
|
||||
// to COM components. If you need to access a type in this assembly from
|
||||
// COM, set the ComVisible attribute to true on that type.
|
||||
[assembly: ComVisible(false)]
|
||||
|
||||
// The following GUID is for the ID of the typelib if this project is exposed to COM
|
||||
[assembly: Guid("d0c795a0-6f20-4a8e-be44-801678754da4")]
|
||||
|
||||
// Version information for an assembly consists of the following four values:
|
||||
//
|
||||
// Major Version
|
||||
// Minor Version
|
||||
// Build Number
|
||||
// Revision
|
||||
//
|
||||
// You can specify all the values or you can default the Build and Revision Numbers
|
||||
// by using the '*' as shown below:
|
||||
// [assembly: AssemblyVersion("1.0.*")]
|
||||
[assembly: AssemblyVersion("1.0.0.0")]
|
||||
[assembly: AssemblyFileVersion("1.0.0.0")]
|
||||
|
|
@ -1,43 +0,0 @@
|
|||
|
||||
Microsoft Visual Studio Solution File, Format Version 12.00
|
||||
# Visual Studio 15
|
||||
VisualStudioVersion = 15.0.27004.2008
|
||||
MinimumVisualStudioVersion = 10.0.40219.1
|
||||
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BlockChain", "BlockChain\BlockChain.csproj", "{E06FC4CE-77D0-4A64-94A6-32A08920E481}"
|
||||
EndProject
|
||||
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BlockChain.Console", "BlockChain.Console\BlockChain.Console.csproj", "{D0C795A0-6F20-4A8E-BE44-801678754DA4}"
|
||||
EndProject
|
||||
Global
|
||||
GlobalSection(SolutionConfigurationPlatforms) = preSolution
|
||||
Debug|Any CPU = Debug|Any CPU
|
||||
Release|Any CPU = Release|Any CPU
|
||||
EndGlobalSection
|
||||
GlobalSection(ProjectConfigurationPlatforms) = postSolution
|
||||
{E06FC4CE-77D0-4A64-94A6-32A08920E481}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
|
||||
{E06FC4CE-77D0-4A64-94A6-32A08920E481}.Debug|Any CPU.Build.0 = Debug|Any CPU
|
||||
{E06FC4CE-77D0-4A64-94A6-32A08920E481}.Release|Any CPU.ActiveCfg = Release|Any CPU
|
||||
{E06FC4CE-77D0-4A64-94A6-32A08920E481}.Release|Any CPU.Build.0 = Release|Any CPU
|
||||
{D0C795A0-6F20-4A8E-BE44-801678754DA4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
|
||||
{D0C795A0-6F20-4A8E-BE44-801678754DA4}.Debug|Any CPU.Build.0 = Debug|Any CPU
|
||||
{D0C795A0-6F20-4A8E-BE44-801678754DA4}.Release|Any CPU.ActiveCfg = Release|Any CPU
|
||||
{D0C795A0-6F20-4A8E-BE44-801678754DA4}.Release|Any CPU.Build.0 = Release|Any CPU
|
||||
EndGlobalSection
|
||||
GlobalSection(SolutionProperties) = preSolution
|
||||
HideSolutionNode = FALSE
|
||||
EndGlobalSection
|
||||
GlobalSection(ExtensibilityGlobals) = postSolution
|
||||
SolutionGuid = {7FB3650B-CAFB-4A71-940B-0CA6F0377422}
|
||||
EndGlobalSection
|
||||
GlobalSection(TeamFoundationVersionControl) = preSolution
|
||||
SccNumberOfProjects = 3
|
||||
SccEnterpriseProvider = {4CA58AB2-18FA-4F8D-95D4-32DDF27D184C}
|
||||
SccTeamFoundationServer = https://devfire.visualstudio.com/
|
||||
SccLocalPath0 = .
|
||||
SccProjectUniqueName1 = BlockChain\\BlockChain.csproj
|
||||
SccProjectName1 = BlockChain
|
||||
SccLocalPath1 = BlockChain
|
||||
SccProjectUniqueName2 = BlockChain.Console\\BlockChain.Console.csproj
|
||||
SccProjectName2 = BlockChain.Console
|
||||
SccLocalPath2 = BlockChain.Console
|
||||
EndGlobalSection
|
||||
EndGlobal
|
||||
|
|
@ -1,19 +0,0 @@
|
|||
using System;
|
||||
using System.Collections.Generic;
|
||||
|
||||
namespace BlockChainDemo
|
||||
{
|
||||
public class Block
|
||||
{
|
||||
public int Index { get; set; }
|
||||
public DateTime Timestamp { get; set; }
|
||||
public List<Transaction> Transactions { get; set; }
|
||||
public int Proof { get; set; }
|
||||
public string PreviousHash { get; set; }
|
||||
|
||||
public override string ToString()
|
||||
{
|
||||
return $"{Index} [{Timestamp.ToString("yyyy-MM-dd HH:mm:ss")}] Proof: {Proof} | PrevHash: {PreviousHash} | Trx: {Transactions.Count}";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,226 +0,0 @@
|
|||
using Newtonsoft.Json;
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Diagnostics;
|
||||
using System.IO;
|
||||
using System.Linq;
|
||||
using System.Net;
|
||||
using System.Security.Cryptography;
|
||||
using System.Text;
|
||||
|
||||
namespace BlockChainDemo
|
||||
{
|
||||
public class BlockChain
|
||||
{
|
||||
private List<Transaction> _currentTransactions = new List<Transaction>();
|
||||
private List<Block> _chain = new List<Block>();
|
||||
private List<Node> _nodes = new List<Node>();
|
||||
private Block _lastBlock => _chain.Last();
|
||||
|
||||
public string NodeId { get; private set; }
|
||||
|
||||
//ctor
|
||||
public BlockChain()
|
||||
{
|
||||
NodeId = Guid.NewGuid().ToString().Replace("-", "");
|
||||
CreateNewBlock(proof: 100, previousHash: "1"); //genesis block
|
||||
}
|
||||
|
||||
//private functionality
|
||||
private void RegisterNode(string address)
|
||||
{
|
||||
_nodes.Add(new Node { Address = new Uri(address) });
|
||||
}
|
||||
|
||||
private bool IsValidChain(List<Block> chain)
|
||||
{
|
||||
Block block = null;
|
||||
Block lastBlock = chain.First();
|
||||
int currentIndex = 1;
|
||||
while (currentIndex < chain.Count)
|
||||
{
|
||||
block = chain.ElementAt(currentIndex);
|
||||
Debug.WriteLine($"{lastBlock}");
|
||||
Debug.WriteLine($"{block}");
|
||||
Debug.WriteLine("----------------------------");
|
||||
|
||||
//Check that the hash of the block is correct
|
||||
if (block.PreviousHash != GetHash(lastBlock))
|
||||
return false;
|
||||
|
||||
//Check that the Proof of Work is correct
|
||||
if (!IsValidProof(lastBlock.Proof, block.Proof, lastBlock.PreviousHash))
|
||||
return false;
|
||||
|
||||
lastBlock = block;
|
||||
currentIndex++;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
private bool ResolveConflicts()
|
||||
{
|
||||
List<Block> newChain = null;
|
||||
int maxLength = _chain.Count;
|
||||
|
||||
foreach (Node node in _nodes)
|
||||
{
|
||||
var url = new Uri(node.Address, "/chain");
|
||||
var request = (HttpWebRequest)WebRequest.Create(url);
|
||||
var response = (HttpWebResponse)request.GetResponse();
|
||||
|
||||
if (response.StatusCode == HttpStatusCode.OK)
|
||||
{
|
||||
var model = new
|
||||
{
|
||||
chain = new List<Block>(),
|
||||
length = 0
|
||||
};
|
||||
string json = new StreamReader(response.GetResponseStream()).ReadToEnd();
|
||||
var data = JsonConvert.DeserializeAnonymousType(json, model);
|
||||
|
||||
if (data.chain.Count > _chain.Count && IsValidChain(data.chain))
|
||||
{
|
||||
maxLength = data.chain.Count;
|
||||
newChain = data.chain;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (newChain != null)
|
||||
{
|
||||
_chain = newChain;
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
private Block CreateNewBlock(int proof, string previousHash = null)
|
||||
{
|
||||
var block = new Block
|
||||
{
|
||||
Index = _chain.Count,
|
||||
Timestamp = DateTime.UtcNow,
|
||||
Transactions = _currentTransactions.ToList(),
|
||||
Proof = proof,
|
||||
PreviousHash = previousHash ?? GetHash(_chain.Last())
|
||||
};
|
||||
|
||||
_currentTransactions.Clear();
|
||||
_chain.Add(block);
|
||||
return block;
|
||||
}
|
||||
|
||||
private int CreateProofOfWork(int lastProof, string previousHash)
|
||||
{
|
||||
int proof = 0;
|
||||
while (!IsValidProof(lastProof, proof, previousHash))
|
||||
proof++;
|
||||
|
||||
return proof;
|
||||
}
|
||||
|
||||
private bool IsValidProof(int lastProof, int proof, string previousHash)
|
||||
{
|
||||
string guess = $"{lastProof}{proof}{previousHash}";
|
||||
string result = GetSha256(guess);
|
||||
return result.StartsWith("0000");
|
||||
}
|
||||
|
||||
private string GetHash(Block block)
|
||||
{
|
||||
string blockText = JsonConvert.SerializeObject(block);
|
||||
return GetSha256(blockText);
|
||||
}
|
||||
|
||||
private string GetSha256(string data)
|
||||
{
|
||||
var sha256 = new SHA256Managed();
|
||||
var hashBuilder = new StringBuilder();
|
||||
|
||||
byte[] bytes = Encoding.Unicode.GetBytes(data);
|
||||
byte[] hash = sha256.ComputeHash(bytes);
|
||||
|
||||
foreach (byte x in hash)
|
||||
hashBuilder.Append($"{x:x2}");
|
||||
|
||||
return hashBuilder.ToString();
|
||||
}
|
||||
|
||||
//web server calls
|
||||
internal string Mine()
|
||||
{
|
||||
int proof = CreateProofOfWork(_lastBlock.Proof, _lastBlock.PreviousHash);
|
||||
|
||||
CreateTransaction(sender: "0", recipient: NodeId, amount: 1);
|
||||
Block block = CreateNewBlock(proof /*, _lastBlock.PreviousHash*/);
|
||||
|
||||
var response = new
|
||||
{
|
||||
Message = "New Block Forged",
|
||||
Index = block.Index,
|
||||
Transactions = block.Transactions.ToArray(),
|
||||
Proof = block.Proof,
|
||||
PreviousHash = block.PreviousHash
|
||||
};
|
||||
|
||||
return JsonConvert.SerializeObject(response);
|
||||
}
|
||||
|
||||
internal string GetFullChain()
|
||||
{
|
||||
var response = new
|
||||
{
|
||||
chain = _chain.ToArray(),
|
||||
length = _chain.Count
|
||||
};
|
||||
|
||||
return JsonConvert.SerializeObject(response);
|
||||
}
|
||||
|
||||
internal string RegisterNodes(string[] nodes)
|
||||
{
|
||||
var builder = new StringBuilder();
|
||||
foreach (string node in nodes)
|
||||
{
|
||||
string url = $"http://{node}";
|
||||
RegisterNode(url);
|
||||
builder.Append($"{url}, ");
|
||||
}
|
||||
|
||||
builder.Insert(0, $"{nodes.Count()} new nodes have been added: ");
|
||||
string result = builder.ToString();
|
||||
return result.Substring(0, result.Length - 2);
|
||||
}
|
||||
|
||||
internal string Consensus()
|
||||
{
|
||||
bool replaced = ResolveConflicts();
|
||||
string message = replaced ? "was replaced" : "is authoritive";
|
||||
|
||||
var response = new
|
||||
{
|
||||
Message = $"Our chain {message}",
|
||||
Chain = _chain
|
||||
};
|
||||
|
||||
return JsonConvert.SerializeObject(response);
|
||||
}
|
||||
|
||||
internal int CreateTransaction(string sender, string recipient, int amount)
|
||||
{
|
||||
var transaction = new Transaction
|
||||
{
|
||||
Sender = sender,
|
||||
Recipient = recipient,
|
||||
Amount = amount
|
||||
};
|
||||
|
||||
_currentTransactions.Add(transaction);
|
||||
|
||||
return _lastBlock != null ? _lastBlock.Index + 1 : 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,73 +0,0 @@
|
|||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
|
||||
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
|
||||
<PropertyGroup>
|
||||
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
|
||||
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
|
||||
<ProjectGuid>{E06FC4CE-77D0-4A64-94A6-32A08920E481}</ProjectGuid>
|
||||
<OutputType>Library</OutputType>
|
||||
<AppDesignerFolder>Properties</AppDesignerFolder>
|
||||
<RootNamespace>BlockChainDemo</RootNamespace>
|
||||
<AssemblyName>BlockChainDemo</AssemblyName>
|
||||
<TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
|
||||
<FileAlignment>512</FileAlignment>
|
||||
<SccProjectName>SAK</SccProjectName>
|
||||
<SccLocalPath>SAK</SccLocalPath>
|
||||
<SccAuxPath>SAK</SccAuxPath>
|
||||
<SccProvider>SAK</SccProvider>
|
||||
<TargetFrameworkProfile />
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
|
||||
<DebugSymbols>true</DebugSymbols>
|
||||
<DebugType>full</DebugType>
|
||||
<Optimize>false</Optimize>
|
||||
<OutputPath>bin\Debug\</OutputPath>
|
||||
<DefineConstants>DEBUG;TRACE</DefineConstants>
|
||||
<ErrorReport>prompt</ErrorReport>
|
||||
<WarningLevel>4</WarningLevel>
|
||||
</PropertyGroup>
|
||||
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
|
||||
<DebugType>pdbonly</DebugType>
|
||||
<Optimize>true</Optimize>
|
||||
<OutputPath>bin\Release\</OutputPath>
|
||||
<DefineConstants>TRACE</DefineConstants>
|
||||
<ErrorReport>prompt</ErrorReport>
|
||||
<WarningLevel>4</WarningLevel>
|
||||
</PropertyGroup>
|
||||
<ItemGroup>
|
||||
<Reference Include="Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
|
||||
<HintPath>..\packages\Newtonsoft.Json.10.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
|
||||
</Reference>
|
||||
<Reference Include="System" />
|
||||
<Reference Include="System.configuration" />
|
||||
<Reference Include="System.Core" />
|
||||
<Reference Include="System.Xml.Linq" />
|
||||
<Reference Include="System.Data.DataSetExtensions" />
|
||||
<Reference Include="Microsoft.CSharp" />
|
||||
<Reference Include="System.Data" />
|
||||
<Reference Include="System.Net.Http" />
|
||||
<Reference Include="System.Xml" />
|
||||
<Reference Include="TinyWebServer, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
|
||||
<HintPath>..\packages\TinyWebServer.dll.1.0.1\lib\net40\TinyWebServer.dll</HintPath>
|
||||
</Reference>
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<Compile Include="Block.cs" />
|
||||
<Compile Include="BlockChain.cs" />
|
||||
<Compile Include="Node.cs" />
|
||||
<Compile Include="Properties\AssemblyInfo.cs" />
|
||||
<Compile Include="Transaction.cs" />
|
||||
<Compile Include="WebServer.cs" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<None Include="packages.config" />
|
||||
</ItemGroup>
|
||||
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
|
||||
<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
|
||||
Other similar extension points exist, see Microsoft.Common.targets.
|
||||
<Target Name="BeforeBuild">
|
||||
</Target>
|
||||
<Target Name="AfterBuild">
|
||||
</Target>
|
||||
-->
|
||||
</Project>
|
||||
|
|
@ -1,9 +0,0 @@
|
|||
using System;
|
||||
|
||||
namespace BlockChainDemo
|
||||
{
|
||||
public class Node
|
||||
{
|
||||
public Uri Address { get; set; }
|
||||
}
|
||||
}
|
||||
|
|
@ -1,36 +0,0 @@
|
|||
using System.Reflection;
|
||||
using System.Runtime.CompilerServices;
|
||||
using System.Runtime.InteropServices;
|
||||
|
||||
// General Information about an assembly is controlled through the following
|
||||
// set of attributes. Change these attribute values to modify the information
|
||||
// associated with an assembly.
|
||||
[assembly: AssemblyTitle("BlockChain")]
|
||||
[assembly: AssemblyDescription("")]
|
||||
[assembly: AssemblyConfiguration("")]
|
||||
[assembly: AssemblyCompany("")]
|
||||
[assembly: AssemblyProduct("BlockChain")]
|
||||
[assembly: AssemblyCopyright("Copyright © 2017")]
|
||||
[assembly: AssemblyTrademark("")]
|
||||
[assembly: AssemblyCulture("")]
|
||||
|
||||
// Setting ComVisible to false makes the types in this assembly not visible
|
||||
// to COM components. If you need to access a type in this assembly from
|
||||
// COM, set the ComVisible attribute to true on that type.
|
||||
[assembly: ComVisible(false)]
|
||||
|
||||
// The following GUID is for the ID of the typelib if this project is exposed to COM
|
||||
[assembly: Guid("e06fc4ce-77d0-4a64-94a6-32a08920e481")]
|
||||
|
||||
// Version information for an assembly consists of the following four values:
|
||||
//
|
||||
// Major Version
|
||||
// Minor Version
|
||||
// Build Number
|
||||
// Revision
|
||||
//
|
||||
// You can specify all the values or you can default the Build and Revision Numbers
|
||||
// by using the '*' as shown below:
|
||||
// [assembly: AssemblyVersion("1.0.*")]
|
||||
[assembly: AssemblyVersion("1.0.0.0")]
|
||||
[assembly: AssemblyFileVersion("1.0.0.0")]
|
||||
|
|
@ -1,9 +0,0 @@
|
|||
namespace BlockChainDemo
|
||||
{
|
||||
public class Transaction
|
||||
{
|
||||
public int Amount { get; set; }
|
||||
public string Recipient { get; set; }
|
||||
public string Sender { get; set; }
|
||||
}
|
||||
}
|
||||
|
|
@ -1,78 +0,0 @@
|
|||
using Newtonsoft.Json;
|
||||
using System.Configuration;
|
||||
using System.IO;
|
||||
using System.Net;
|
||||
using System.Net.Http;
|
||||
|
||||
namespace BlockChainDemo
|
||||
{
|
||||
public class WebServer
|
||||
{
|
||||
public WebServer(BlockChain chain)
|
||||
{
|
||||
var settings = ConfigurationManager.AppSettings;
|
||||
string host = settings["host"]?.Length > 1 ? settings["host"] : "localhost";
|
||||
string port = settings["port"]?.Length > 1 ? settings["port"] : "12345";
|
||||
|
||||
var server = new TinyWebServer.WebServer(request =>
|
||||
{
|
||||
string path = request.Url.PathAndQuery.ToLower();
|
||||
string query = "";
|
||||
string json = "";
|
||||
if (path.Contains("?"))
|
||||
{
|
||||
string[] parts = path.Split('?');
|
||||
path = parts[0];
|
||||
query = parts[1];
|
||||
}
|
||||
|
||||
switch (path)
|
||||
{
|
||||
//GET: http://localhost:12345/mine
|
||||
case "/mine":
|
||||
return chain.Mine();
|
||||
|
||||
//POST: http://localhost:12345/transactions/new
|
||||
//{ "Amount":123, "Recipient":"ebeabf5cc1d54abdbca5a8fe9493b479", "Sender":"31de2e0ef1cb4937830fcfd5d2b3b24f" }
|
||||
case "/transactions/new":
|
||||
if (request.HttpMethod != HttpMethod.Post.Method)
|
||||
return $"{new HttpResponseMessage(HttpStatusCode.MethodNotAllowed)}";
|
||||
|
||||
json = new StreamReader(request.InputStream).ReadToEnd();
|
||||
Transaction trx = JsonConvert.DeserializeObject<Transaction>(json);
|
||||
int blockId = chain.CreateTransaction(trx.Sender, trx.Recipient, trx.Amount);
|
||||
return $"Your transaction will be included in block {blockId}";
|
||||
|
||||
//GET: http://localhost:12345/chain
|
||||
case "/chain":
|
||||
return chain.GetFullChain();
|
||||
|
||||
//POST: http://localhost:12345/nodes/register
|
||||
//{ "Urls": ["localhost:54321", "localhost:54345", "localhost:12321"] }
|
||||
case "/nodes/register":
|
||||
if (request.HttpMethod != HttpMethod.Post.Method)
|
||||
return $"{new HttpResponseMessage(HttpStatusCode.MethodNotAllowed)}";
|
||||
|
||||
json = new StreamReader(request.InputStream).ReadToEnd();
|
||||
var urlList = new { Urls = new string[0] };
|
||||
var obj = JsonConvert.DeserializeAnonymousType(json, urlList);
|
||||
return chain.RegisterNodes(obj.Urls);
|
||||
|
||||
//GET: http://localhost:12345/nodes/resolve
|
||||
case "/nodes/resolve":
|
||||
return chain.Consensus();
|
||||
}
|
||||
|
||||
return "";
|
||||
},
|
||||
$"http://{host}:{port}/mine/",
|
||||
$"http://{host}:{port}/transactions/new/",
|
||||
$"http://{host}:{port}/chain/",
|
||||
$"http://{host}:{port}/nodes/register/",
|
||||
$"http://{host}:{port}/nodes/resolve/"
|
||||
);
|
||||
|
||||
server.Run();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,5 +0,0 @@
|
|||
<?xml version="1.0" encoding="utf-8"?>
|
||||
<packages>
|
||||
<package id="Newtonsoft.Json" version="10.0.3" targetFramework="net451" />
|
||||
<package id="TinyWebServer.dll" version="1.0.1" targetFramework="net451" />
|
||||
</packages>
|
||||
|
|
@ -0,0 +1,57 @@
|
|||
from sqlalchemy import Column, DateTime, Integer, PickleType, String, create_engine
|
||||
from sqlalchemy.ext.declarative import declarative_base, declared_attr
|
||||
from sqlalchemy.orm import scoped_session, sessionmaker
|
||||
|
||||
|
||||
# Set up the Database
|
||||
engine = create_engine('sqlite:///electron.db')
|
||||
db = scoped_session(sessionmaker(bind=engine))
|
||||
|
||||
|
||||
Base = declarative_base()
|
||||
|
||||
|
||||
class BaseModel(Base):
|
||||
__abstract__ = True
|
||||
|
||||
@declared_attr
|
||||
def __tablename__(self):
|
||||
"""
|
||||
Ensures all tables have the same name as their models (below)
|
||||
"""
|
||||
return self.__name__.lower()
|
||||
|
||||
def to_dict(self):
|
||||
"""
|
||||
Helper method to convert any database row to dict
|
||||
"""
|
||||
return {c.name: getattr(self, c.name) for c in self.__table__.columns}
|
||||
|
||||
|
||||
class Peer(BaseModel):
|
||||
identifier = Column(String(32), primary_key=True)
|
||||
hostname = Column(String, index=True, unique=True)
|
||||
timestamp = Column(DateTime, index=True)
|
||||
|
||||
|
||||
class Block(BaseModel):
|
||||
height = Column(Integer, primary_key=True)
|
||||
timestamp = Column(DateTime, index=True)
|
||||
transactions = Column(PickleType)
|
||||
previous_hash = Column(String(64))
|
||||
proof = Column(String(64))
|
||||
hash = Column(String(64))
|
||||
|
||||
|
||||
class Config(BaseModel):
|
||||
key = Column(String(64), primary_key=True, unique=True)
|
||||
value = Column(PickleType)
|
||||
|
||||
|
||||
def reset_db():
|
||||
"""
|
||||
Drops and Re-creates the Database
|
||||
"""
|
||||
Base.metadata.drop_all(bind=engine)
|
||||
Base.metadata.create_all(bind=engine)
|
||||
|
||||
|
|
@ -0,0 +1,52 @@
|
|||
from hashlib import sha256
|
||||
|
||||
from sqlalchemy import func
|
||||
|
||||
from database import Config, Peer, db
|
||||
|
||||
|
||||
def set_config(key, value, replace=False):
|
||||
config_value = get_config(key)
|
||||
|
||||
if config_value is None:
|
||||
db.add(Config(key=key, value=value))
|
||||
db.commit()
|
||||
return value
|
||||
|
||||
if config_value != value and replace is True:
|
||||
db.add(Config(key=key, value=value))
|
||||
db.commit()
|
||||
return value
|
||||
|
||||
return config_value
|
||||
|
||||
|
||||
def get_config(key, default=None):
|
||||
config = db.query(Config).filter_by(key=key).first()
|
||||
if config:
|
||||
return config.value
|
||||
else:
|
||||
return default
|
||||
|
||||
|
||||
def get_random_peers(limit=10):
|
||||
"""
|
||||
Returns random peers
|
||||
|
||||
:param limit: How many peers to return
|
||||
:return:
|
||||
"""
|
||||
return db.query(Peer).order_by(func.random()).limit(limit)
|
||||
|
||||
|
||||
def hash_block(block):
|
||||
"""
|
||||
Creates a SHA-256 hash_block of the fields for a Block
|
||||
"""
|
||||
byte_array = f"{block['height']}" \
|
||||
f"{block['timestamp']}" \
|
||||
f"{block['transactions']}" \
|
||||
f"{block['previous_hash']}" \
|
||||
f"{block['proof']}".encode()
|
||||
|
||||
return sha256(byte_array).hexdigest()
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
import asyncio
|
||||
import logging
|
||||
import multiprocessing
|
||||
from datetime import datetime
|
||||
|
||||
from helpers import hash_block
|
||||
from tasks import we_should_still_be_mining
|
||||
|
||||
|
||||
log = logging.getLogger('root.mining')
|
||||
|
||||
|
||||
def proof_of_work(current_block, difficulty, event):
|
||||
"""
|
||||
Simple Proof of Work Algorithm
|
||||
|
||||
:param current_block: The partially complete block currently being mined
|
||||
:param difficulty: The minimum number of leading zeros
|
||||
"""
|
||||
|
||||
# String of 64 f's replaced with 3 leading zeros (if the difficulty is 3): 000fff...f
|
||||
target = str.ljust("0" * difficulty, 64, "f")
|
||||
|
||||
guess_hash = hash_block(current_block)
|
||||
|
||||
while guess_hash > target:
|
||||
# Check if we should still be mining
|
||||
# if not event.is_set():
|
||||
# raise Exception("STOP MINING")
|
||||
current_block['timestamp'] = datetime.utcnow()
|
||||
current_block['proof'] += 1
|
||||
guess_hash = hash_block(current_block)
|
||||
|
||||
current_block['hash'] = guess_hash
|
||||
return current_block
|
||||
|
||||
|
||||
def miner(pipe, event):
|
||||
while True:
|
||||
task = pipe.recv()
|
||||
log.debug(f"Received new mining task with difficulty {task['difficulty']}")
|
||||
|
||||
if task:
|
||||
found_block = proof_of_work(task['block'], task['difficulty'], event)
|
||||
pipe.send({'found_block': found_block})
|
||||
|
||||
|
||||
async def mining_controller(app):
|
||||
pipe, remote_pipe = multiprocessing.Pipe()
|
||||
event = multiprocessing.Event()
|
||||
|
||||
# Spawn a new process consisting of the miner() function
|
||||
# and send the right end of the pipe to it
|
||||
process = multiprocessing.Process(target=miner, args=(remote_pipe, event))
|
||||
process.start()
|
||||
|
||||
pipe.send({'block': app.blockchain.build_block(), 'difficulty': 5})
|
||||
|
||||
while True:
|
||||
event.set()
|
||||
|
||||
# We'll check the pipe every 100 ms
|
||||
await asyncio.sleep(0.1)
|
||||
|
||||
# Check if we should still be mining
|
||||
if not we_should_still_be_mining():
|
||||
event.clear()
|
||||
|
||||
if pipe.poll():
|
||||
result = pipe.recv()
|
||||
found_block = result['found_block']
|
||||
|
||||
app.blockchain.save_block(found_block)
|
||||
log.info(f"Mined Block {found_block['height']} containing {len(found_block['transactions'])} transactions")
|
||||
pipe.send({'block': app.blockchain.build_block(), 'difficulty': 5})
|
||||
|
|
@ -0,0 +1,65 @@
|
|||
import miniupnpc
|
||||
|
||||
import logging
|
||||
|
||||
|
||||
log = logging.getLogger('root.networking')
|
||||
|
||||
|
||||
class PortMapper(object):
|
||||
def __init__(self):
|
||||
client = miniupnpc.UPnP()
|
||||
client.discoverdelay = 200
|
||||
|
||||
try:
|
||||
log.info('Searching for Internet Gateway Devices... (timeout: %sms)', client.discoverdelay)
|
||||
device_count = client.discover()
|
||||
|
||||
log.info('Found %s devices', device_count)
|
||||
|
||||
self.client = client
|
||||
self.device_count = device_count
|
||||
self.internal_ip = None
|
||||
self.external_ip = None
|
||||
self.external_port = None
|
||||
|
||||
except Exception as e:
|
||||
log.error('An unexpected error occurred: %s', e)
|
||||
self.client = None
|
||||
|
||||
def add_portmapping(self, internal_port, external_port, protocol, label=''):
|
||||
if self.client is None:
|
||||
log.error('No uPnP devices were found on the network')
|
||||
return
|
||||
|
||||
try:
|
||||
self.client.selectigd()
|
||||
|
||||
self.internal_ip = self.client.lanaddr
|
||||
self.external_ip = self.client.externalipaddress()
|
||||
|
||||
log.info('Internal IP: %s', self.internal_ip)
|
||||
log.info('External IP: %s', self.external_ip)
|
||||
|
||||
log.info('Attempting %s redirect: %s:%s -> %s:%s', protocol,
|
||||
self.external_ip, external_port,
|
||||
self.internal_ip, internal_port)
|
||||
|
||||
# Find an available port for the redirect
|
||||
port_mapping = self.client.getspecificportmapping(external_port, protocol)
|
||||
while port_mapping is None and external_port < 65536:
|
||||
external_port += 1
|
||||
port_mapping = self.client.getspecificportmapping(external_port, protocol)
|
||||
|
||||
success = self.client.addportmapping(external_port, protocol, self.internal_ip, internal_port, label, '')
|
||||
|
||||
if success:
|
||||
log.info('Successful %s redirect: %s:%s -> %s:%s', protocol,
|
||||
self.external_ip, external_port,
|
||||
self.internal_ip, internal_port)
|
||||
self.external_port = external_port
|
||||
else:
|
||||
log.error('Failed to map a port')
|
||||
|
||||
except Exception as e:
|
||||
log.error('An unexpected error occurred: %s', e)
|
||||
|
|
@ -0,0 +1,41 @@
|
|||
from sanic import Sanic
|
||||
from sanic.response import json
|
||||
from sqlalchemy import func
|
||||
|
||||
from database import Peer, db, reset_db
|
||||
from tasks import initiate_node, peer_discovery
|
||||
from mining import mining_controller
|
||||
|
||||
|
||||
app = Sanic()
|
||||
|
||||
reset_db()
|
||||
initiate_node(app)
|
||||
|
||||
app.add_task(peer_discovery(app))
|
||||
app.add_task(mining_controller(app))
|
||||
|
||||
|
||||
@app.route("/")
|
||||
async def peers(request):
|
||||
random_peers = db.query(Peer).order_by(func.random()).limit(256).all()
|
||||
return json(random_peers)
|
||||
|
||||
|
||||
@app.route("/transactions")
|
||||
async def current_transactions(request):
|
||||
if request.method == 'GET':
|
||||
return json(app.blockchain.current_transactions)
|
||||
elif request.method == 'POST':
|
||||
return json({"text": "thanks for your transaction"})
|
||||
|
||||
|
||||
@app.route("/blocks")
|
||||
async def blocks(request):
|
||||
# height = request.parsed_args['height']
|
||||
random_blocks = app.blockchain.get_blocks()
|
||||
return json(random_blocks)
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
app.run(debug=False, host="0.0.0.0", port=8080)
|
||||
|
|
@ -0,0 +1,64 @@
|
|||
import asyncio
|
||||
import logging
|
||||
from uuid import uuid4
|
||||
|
||||
import aiohttp
|
||||
|
||||
from blockchain import Blockchain
|
||||
from database import db
|
||||
from helpers import get_config, get_random_peers, set_config
|
||||
from networking import PortMapper
|
||||
|
||||
|
||||
log = logging.getLogger('root.tasks')
|
||||
|
||||
|
||||
def initiate_node(app):
|
||||
# Set up TCP Redirect (Port Forwarding)
|
||||
# port_mapper = PortMapper()
|
||||
# port_mapper.add_portmapping(8080, 8080, 'TCP', 'Electron')
|
||||
|
||||
# Set the identifier (unique Id) for our node (if it doesn't exist)
|
||||
node_identifier = set_config(key='node_identifier', value=uuid4().hex)
|
||||
|
||||
# app.request_headers = {
|
||||
# 'content-type': 'application/json',
|
||||
# 'x-node-identifier': node_identifier,
|
||||
# 'x-node-ip': port_mapper.external_ip,
|
||||
# 'x-node-port': port_mapper.external_port,
|
||||
# }
|
||||
|
||||
log.info('Node Identifier: %s', node_identifier)
|
||||
|
||||
# Add the Blockchain helper class to the app
|
||||
app.blockchain = Blockchain()
|
||||
|
||||
|
||||
async def peer_discovery(app):
|
||||
"""
|
||||
Ask random peers to return peers they know about
|
||||
"""
|
||||
while True:
|
||||
peers = get_random_peers()
|
||||
|
||||
for peer in peers:
|
||||
try:
|
||||
response = await aiohttp.request('GET', 'peer.hostname', headers=app.request_headers)
|
||||
print(f'Made request: {response.status}')
|
||||
|
||||
except asyncio.TimeoutError:
|
||||
db.delete(peer)
|
||||
db.commit()
|
||||
print(f'{peer.hostname}: Deleted node')
|
||||
|
||||
await asyncio.sleep(10)
|
||||
|
||||
|
||||
async def watch_blockchain(app):
|
||||
while True:
|
||||
print(f'TXN: {app.blockchain.current_transactions}')
|
||||
await asyncio.sleep(2)
|
||||
|
||||
|
||||
def we_should_still_be_mining():
|
||||
return True
|
||||
|
|
@ -11,7 +11,7 @@ class BlockchainTestCase(TestCase):
|
|||
self.blockchain = Blockchain()
|
||||
|
||||
def create_block(self, proof=123, previous_hash='abc'):
|
||||
self.blockchain.new_block(proof, previous_hash)
|
||||
self.blockchain.build_block(proof, previous_hash)
|
||||
|
||||
def create_transaction(self, sender='a', recipient='b', amount=1):
|
||||
self.blockchain.new_transaction(
|
||||
|
|
@ -101,4 +101,4 @@ class TestHashingAndProofs(BlockchainTestCase):
|
|||
new_hash = hashlib.sha256(new_block_json).hexdigest()
|
||||
|
||||
assert len(new_hash) == 64
|
||||
assert new_hash == self.blockchain.hash(new_block)
|
||||
assert new_hash == self.blockchain.hash_block(new_block)
|
||||
|
|
|
|||
Loading…
Reference in New Issue