So I'm building an Android wallet for Vegas coin (See
https://github.com/VegasCoin) which is based off Franko coin, which is based off the schildbach android wallet. All went fine until I started building the checkpoints file, where I get the error "
Network provided difficulty bits do not match what was calculated"
To build the checkpoints file, I use
mvn exec:java -Dexec.mainClass=com.google.bitcoin.tools.BuildCheckpoints
with this result:
$ mvn exec:java -Dexec.mainClass=com.google.bitcoin.tools.BuildCheckpoints
[INFO] Scanning for projects...
[INFO]
[INFO] Using the builder org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder with a thread count of 1
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building vegasj Tools 0.11
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- exec-maven-plugin:1.3.1:java (default-cli) @ vegasj-tools ---
[WARNING] Warning: killAfter is now deprecated. Do you need it ? Please comment on MEXEC-6.
03:31:33 9 AbstractBlockChain.: chain head is at height 0:
v1 block:
previous block: 0000000000000000000000000000000000000000000000000000000000000000
merkle root: 3f5f95df1e8ba364df188ce3a5a5c4aa27d579272d4eb3f8cc1904a88cba872f
time: [1392172369] Tue Feb 11 20:32:49 CST 2014
difficulty target (nBits): 504365040
nonce: 2893208
03:31:34 12 NioClientManager.handleKey: Successfully connected to laptop/127.0.1.1:52400
03:31:34 12 Peer.connectionOpened: Announcing to laptop/127.0.1.1:52400 as: /VegasJ:0.11-SNAPSHOT/
03:31:34 12 Peer.processVersionMessage: Connected to 127.0.1.1: version=70002, subVer='/Satoshi:2.0.1.1/', services=0x3, time=2014-07-16 03:31:34, blocks=337532
03:31:34 12 PeerGroup.handleNewPeer: [127.0.1.1]:52400: New peer
03:31:34 12 PeerGroup.setDownloadPeer: Setting download peer: [127.0.1.1]:52400
03:31:34 12 DownloadListener.startDownload: Downloading block chain of size 337532. This may take a while.
03:31:34 12 AbstractBlockChain.checkDifficultyTransitions_V1: Difficulty hit proof of work limit: 1f1fed02d82d82d82d82d82d82d82d82d82d82d82d82d82d82d82d82d82d
Checkpointing block 04abad822c2b1d9ed67dddeecea13ee5f4fb11a2ed32cdf59c319f1718c8492a at height 720
03:31:34 12 AbstractBlockChain.add: 861 blocks per second
Checkpointing block bc70e33acea9823a70ac38718455727ae4b64d6d2bf37882191cbb0f1ad94b27 at height 1440
Checkpointing block b829708031fc089f3ae540f72a7beb826d84cca63135d27ce9f5133f44a75406 at height 2160
03:31:35 12 AbstractBlockChain.add: 1595 blocks per second
Checkpointing block 720d6a76c4a16d2fd29ed712d2b37cb834a242cf4b16958df1104af32a5ec59d at height 2880
03:31:36 12 DownloadListener.progress: Chain download 1% done with 334156 blocks to go, block date Feb 14, 2014 4:24:59 AM
Checkpointing block 9a09621e50850f6e31164aa63098619760b857294db6c475988959cdc3d3bcd0 at height 3600
03:31:36 12 AbstractBlockChain.add: 1544 blocks per second
Checkpointing block 16f11edd4ef303f7703bdacbbe03a5bb1db651e8e369724803058b185c1d5717 at height 4320
Checkpointing block 4b4e0186b84d4bdb49fb3cfc87078964d84e0e8bf52983b4ad93e9e8456b8dba at height 5040
03:31:37 12 AbstractBlockChain.add: 1492 blocks per second
Checkpointing block 8e470e1721bbf33989d807ea255e28560b38a4616982cf5452e07170f04ec8e3 at height 5760
Checkpointing block d426a6b7c97cb9f52195b134de13b80ab7d4059f24a4288936653f19967ff4d0 at height 6480
03:31:38 12 DownloadListener.progress: Chain download 2% done with 330781 blocks to go, block date Feb 16, 2014 2:07:01 PM
Checkpointing block a211f4708b4e5b559f07b7c7044f09fb625e66b802fe1ecc904b120a8753697c at height 7200
03:31:38 12 AbstractBlockChain.add: 1712 blocks per second
Checkpointing block a63ea505ce382d5249f38226a7aff6ef5d28f7395695648d79fd7231fadc84fc at height 7920
03:31:39 12 AbstractBlockChain.add: 1411 blocks per second
Checkpointing block fa26aa1649a219d48d8aec8c3375edd4ecbb0d23b7640d00e8c82676f17fa193 at height 8640
Checkpointing block 8c8f54df4a2d29d7ab77336e06477651aea5a3e8ffdd6b47a76634b6a282978b at height 9360
03:31:40 12 AbstractBlockChain.add: 1385 blocks per second
Checkpointing block ce4b7e96eb0afbcf70f982bddfa387515a5ac7529369956c05d273e9b6560397 at height 10080
03:31:41 12 DownloadListener.progress: Chain download 3% done with 327406 blocks to go, block date Feb 22, 2014 9:42:01 PM
Checkpointing block f27b6115f3ffcc8b235cf3db107cc9cf1065125a99c9184cd38993cf320d14f4 at height 10800
03:31:41 12 AbstractBlockChain.add: 1507 blocks per second
Checkpointing block aa5d31028f8698851acccc6dbdf57d78af8641cb87f3836f978839435025db5c at height 11520
03:31:42 12 AbstractBlockChain.add: Block does not connect: 7e3239126b95f08f9f50005047f494deeba4128a85145783c93fc56783c7f014 prev 3e70b836934a45885353d7672145959ca92e6b2ac7440d8c5300222a281f396d
03:31:42 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:31:42 12 AbstractBlockChain.add: Block does not connect: 6e2487d0ecf5d283f05a979f7459f64049c16ba80adbad15664cb82b89701100 prev 7e3239126b95f08f9f50005047f494deeba4128a85145783c93fc56783c7f014
03:31:42 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
Checkpointing block 779d7fbefa3fe0a17e894336e1d44ed49a4a2a729b1e34128a5d340965e2cd67 at height 12240
Checkpointing block ca1d61a3faf57350a97937d56af1c79aa870a5259d7f917a92d7c78cc5094127 at height 12960
03:31:42 12 AbstractBlockChain.add: 1855 blocks per second
03:31:43 12 DownloadListener.progress: Chain download 4% done with 324030 blocks to go, block date Feb 28, 2014 5:33:36 AM
Checkpointing block c803cef55436173af56bbe75dc01556e3a33a52973a059e97b48d90b3bdfb598 at height 13680
Checkpointing block c60af20b56b8636cd539fefae8da0e31e2abf2d81d26829e8c617c3082d43b09 at height 14400
03:31:43 12 Peer.processHeaders: Block header verification failed
com.google.bitcoin.core.VerificationException: Could not verify block 1681a49faa25c2ce30e53333e126c8cc102fac66a24b95c60ff73e2a6a22849b
v1 block:
previous block: 545e9f880e5695d30100bfb43fd8a16c3abdd7c5e78c0fc6e85b873f89d297df
merkle root: 67142d11c63bc5d88f94299a020f5df9c7ca583eaf998ba42d994af39b114aaa
time: [1393739887] Sat Mar 01 23:58:07 CST 2014
difficulty target (nBits): 486655270
nonce: 446365696
at com.google.bitcoin.core.AbstractBlockChain.add(AbstractBlockChain.java:260)
at com.google.bitcoin.core.Peer.processHeaders(Peer.java:480)
at com.google.bitcoin.core.Peer.processMessage(Peer.java:324)
at com.google.bitcoin.core.PeerSocketHandler.receiveBytes(PeerSocketHandler.java:139)
at com.google.bitcoin.net.ConnectionHandler.handleKey(ConnectionHandler.java:216)
at com.google.bitcoin.net.NioClientManager.handleKey(NioClientManager.java:74)
at com.google.bitcoin.net.NioClientManager.run(NioClientManager.java:109)
at com.google.common.util.concurrent.AbstractExecutionThreadService$1$1.run(AbstractExecutionThreadService.java:52)
at java.lang.Thread.run(Thread.java:744)
Caused by: com.google.bitcoin.core.VerificationException: Network provided difficulty bits do not match what was calculated: 1c5260000000000000000000000000000000000000000000000000000 vs 163d50000000000000000000000000000000000000000000000000000
at com.google.bitcoin.core.AbstractBlockChain.checkDifficultyTransitions_V1(AbstractBlockChain.java:894)
at com.google.bitcoin.core.AbstractBlockChain.checkDifficultyTransitions(AbstractBlockChain.java:809)
at com.google.bitcoin.core.AbstractBlockChain.add(AbstractBlockChain.java:394)
at com.google.bitcoin.core.AbstractBlockChain.add(AbstractBlockChain.java:250)
... 8 more
03:32:11 12 AbstractBlockChain.add: 1757 blocks per second
03:32:11 12 AbstractBlockChain.add: Block does not connect: d310ec93d6a66355f19cd2111106c854526ec94dfada5bf61cf32169eb013eb6 prev 6e2487d0ecf5d283f05a979f7459f64049c16ba80adbad15664cb82b89701100
03:32:11 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:32:16 12 AbstractBlockChain.add: Block does not connect: e713bb16b68268e38e3b816827ed8b0310c231671d567b7539d0cf40ad372405 prev d310ec93d6a66355f19cd2111106c854526ec94dfada5bf61cf32169eb013eb6
03:32:16 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:32:34 12 AbstractBlockChain.add: Block does not connect: e7fa4d35c5a2d7264c1c406f5880afba4567ee3fa8795219bfc6227d9b742b50 prev e713bb16b68268e38e3b816827ed8b0310c231671d567b7539d0cf40ad372405
03:32:34 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:32:42 12 AbstractBlockChain.add: Block does not connect: b2fc53ee5ad8cd9f450978332dcdabdc7886144b7acb24d46e86d036ce9cd2d6 prev e7fa4d35c5a2d7264c1c406f5880afba4567ee3fa8795219bfc6227d9b742b50
03:32:42 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:33:09 12 AbstractBlockChain.add: Block does not connect: a50d529961359b974ec2d4073b52e0003e70aac6a541736b2796ef3b6834d5a2 prev b2fc53ee5ad8cd9f450978332dcdabdc7886144b7acb24d46e86d036ce9cd2d6
03:33:09 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:33:35 12 AbstractBlockChain.add: Block does not connect: a46c55920a6161a4142fd02d66f203ef8f623b5ba90c55d4170648305298f779 prev a50d529961359b974ec2d4073b52e0003e70aac6a541736b2796ef3b6834d5a2
03:33:35 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:34:08 12 AbstractBlockChain.add: Block does not connect: 8db7f5af7f407a9c40614d57b8512130fe80c36a16b3b03b8575a384b96ee509 prev a46c55920a6161a4142fd02d66f203ef8f623b5ba90c55d4170648305298f779
03:34:08 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:34:08 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] 5ef1a7c635aabf2f84c65f24bcf63500c634c84e9973f6f0ed72744ca6918174
03:34:09 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] 28d6d33f4d47f520459b2ee74bb3db4093e5d9a70c991d7350fd7b19f5fc3658
03:34:10 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] 3e2100175c33aebe654e7a1f4b2333fe18cc6eee3dd079225adc34cd0ecbf2a9
03:34:16 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] e843a614e46ad6b2b410ecd01e5e13f95559624de822e3f1edb1411626b66078
03:34:16 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] c43517ebbe8a3cd8f3898ff03cd60b9bd9ca67152a6504e8173f0d987a5993c7
03:34:16 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] 3e23e837f68250568bb51a4b2b65a681b5a853526495d92fd5c05367c171b7c6
03:34:16 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] e9fbed74091b84e772cbce5eb3ce52d46b93eba95efdba9e8f3400eecb7bc2a5
03:34:16 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] ad75a22b4568a0b1068dbd646bdd12e88d324e923452e677a0968ce38a8fb917
03:34:31 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] ce171dff4d0103cb6aae4ae7f33927ee3347d0e8fc0842d75579afd0949c0089
03:34:55 12 AbstractBlockChain.add: Block does not connect: c7caaf40be8fc997f24a53096bea2838bfafb1aaff5a1ccc8ccb249dfe66a629 prev 8db7f5af7f407a9c40614d57b8512130fe80c36a16b3b03b8575a384b96ee509
03:34:55 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:35:05 12 AbstractBlockChain.add: Block does not connect: 2e05a2c5f53807069825197e5ca5d6dfbe47244a7ed81734d663d67798ec5a6b prev c7caaf40be8fc997f24a53096bea2838bfafb1aaff5a1ccc8ccb249dfe66a629
03:35:05 12 Peer.processBlock: Did not start chain download on solved block due to in-flight header download.
03:35:17 12 MemoryPool.seen: [127.0.1.1]:52400: Peer announced new transaction [1] 0ddba3ce8f184e8b63b967dff8e1c89ce5e0247385d55b35b6b481a8bc590af9
Ad infinitum..
So basically it hangs on block 15120. I've tried running the android wallet without the checkpoints file, and it starts syncing from 0 and stops at (you guessed it) 15119, with 15120 being the problem..
The block in question is here:
http://explorer.vegascoin.co/block/1681a49faa25c2ce30e53333e126c8cc102fac66a24b95c60ff73e2a6a22849b If memory serves me right, we had an issue around that block, possibly a fork in the chain which had been resolved. Desktop wallets all work fine without any problem, but the android libary keeps hanging
So now I am stuck
. I need a checkpoints file somehow, but I do not know how to resolve this difficulties not matching issue. Is there anything anybody could do to help me? I can send some in BTC for time spent on helping resolving this issue..
