Does every miner verify blocks that are already in the Blockchain

Does every miner verify blocks that are already in the Blockchain

Once a miner adds a block to the chain, does every other miner have to check that block to make sure that its transactions don't violate any rules?

For instance, if a miner added a block with an invalid transaction, is every other miner expected to check that block (and perhaps compare each transaction in it with every other transaction in every other block, to prevent, say, double spending)?

https://ift.tt/2pHQi99

Comments

Post a Comment

Popular posts from this blog

sendrawtransaction and txn-mempool-conflict

sendrawtransaction and txn-mempool-conflict When i sendrawtransaction to bitcoind, i get error (exceptions) 18: txn-mempool-conflict (use Bitcoin JSON-RPC denpamusic/php-bitcoinrpc ) But the transaction is sent to the network and is subsequently confirmed. Example one decoded transaction : https://jsfiddle.net/rn58a4j6/ then i send this transaction: 94ec12fc463230b4285a29b047608627c05572a4c6eabe6688a201ce49ae72f7 https://ift.tt/2MY2KP0
Read more

couldn't connect to server: EOF reached (code 1)

couldn't connect to server: EOF reached (code 1) I'm running a full node on my raspberry pi3. I try to do a simple command such as bitcoin-cli getblockchaininfo but I always get this error: error: couldn't connect to server: EOF reached (code 1) (make sure server is running and you are connecting to the correct RPC port) My bitcoin.conf file looks like this: Bitcoind options server=1 daemon=1 reindex-chainstate=1 reindex=1 txindex=1 disablewallet=1 listenonion=0 Connection settings rpcuser= * rpcpassword=* rpcport=8332 rpcallowip=127.0.0.1 rpcthreads=10 I also tried to get a command with "bitcoin-cli -rpcuser: * - rpcpassword=* -rpcportt8332 getblockchaininfo". But this also didn't work. Does someone has some advice or experience with this error? https://ift.tt/2D82TLW
Read more