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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| #!/usr/bin/env python | ||
| from json import loads, dumps | ||
| from sys import exit, argv | ||
| import base64 | ||
| import urllib.request, urllib.error, urllib.parse | ||
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| # From electrum. | ||
| def bits_to_target(bits): | ||
| bitsN = (bits >> 24) & 0xff | ||
| if not (bitsN >= 0x03 and bitsN <= 0x1f): | ||
| raise BaseException("First part of bits should be in [0x03, 0x1e]") | ||
| bitsBase = bits & 0xffffff | ||
| if not (bitsBase >= 0x8000 and bitsBase <= 0x7fffff): | ||
| raise BaseException("Second part of bits should be in [0x8000, 0x7fffff]") | ||
| return bitsBase << (8 * (bitsN-3)) | ||
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| def rpc(method, params): | ||
| data = { | ||
| "jsonrpc": "1.0", | ||
| "id":"1", | ||
| "method": method, | ||
| "params": params | ||
| } | ||
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| data_json = dumps(data) | ||
| username = "admin" | ||
| password = "changeMe" | ||
| port = 8339 | ||
| if len(argv) > 3: | ||
| port = argv[3] | ||
| url = "http://127.0.0.1:{}/".format(port) | ||
| req = urllib.request.Request(url, data_json.encode("utf-8"), {'content-type': 'application/json'}) | ||
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| base64string = base64.encodestring(('%s:%s' % (username, password)).encode()).decode().replace('\n', '') | ||
| req.add_header("Authorization", "Basic %s" % base64string) | ||
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| response_stream = urllib.request.urlopen(req) | ||
| json_response = response_stream.read() | ||
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| return loads(json_response) | ||
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||
| # Electrum checkpoints are blocks 2015, 2015 + 2016, 2015 + 2016*2, ... | ||
| i = 2015 | ||
| INTERVAL = 2016 | ||
|
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| checkpoints = [] | ||
| block_count = int(rpc('getblockcount', [])['result']) | ||
| print(('Blocks: {}'.format(block_count))) | ||
| while True: | ||
| h = rpc('getblockhash', [i])['result'] | ||
| block = rpc('getblock', [h])['result'] | ||
| bits = "0x" + block['bits'] | ||
| print(bits) | ||
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| checkpoints.append([ | ||
| block['hash'], | ||
| bits_to_target(int(bits, 16)) | ||
| ]) | ||
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| i += INTERVAL | ||
| if i > block_count: | ||
| print('Done.') | ||
| break | ||
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| with open('checkpoints_output.json', 'w+') as f: | ||
| f.write(dumps(checkpoints, indent=4, separators=(',', ':'))) |