Mastering Bitcoin

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Mastering Bitcoin ( mastering-bitcoin )

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"amount" : 0.05000000 } ] } Above, we see the new information in the entries blockhash, the hash of the block in which the transaction was included, and blockindex with value 18, indicating that our transaction was the 18th transaction in that block. Transaction database index and txindex option By default, Bitcoin Core builds a database containing only the transactions related to the user’s wallet. If you want to be able to access any transaction with commands like gettransaction, you need to configure Bitcoin Core to build a complete transaction index, which can be achieved with the txindex option. Set txindex=1 in the Bitcoin Core configuration file (usually found in your home directory under .bitcoin/ bitcoin.conf). Once you change this parameter, you need to restart bitcoind and wait for it to rebuild the index. Exploring blocks Commands: getblock, getblockhash Now that we know which block our transaction was included in, we can query that block. We use the getblock command with the block hash as the parameter: $ bitcoin-cli getblock 000000000000000051d2e759c63a26e247f185ecb7926ed7a6624bc31c2a717b true { "hash" : "000000000000000051d2e759c63a26e247f185ecb7926ed7a6624bc31c2a717b", "confirmations" : 2, "size" : 248758, "height" : 286384, "version" : 2, "merkleroot" : "9891747e37903016c3b77c7a0ef10acf467c530de52d84735bd55538719f9916", "tx":[ "46e130ab3c67d31d2b2c7f8fbc1ca71604a72e6bc504c8a35f777286c6d89bf0", "2d5625725b66d6c1da88b80b41e8c07dc5179ae2553361c96b14bcf1ce2c3868", "923392fc41904894f32d7c127059bed27dbb3cfd550d87b9a2dc03824f249c80", "f983739510a0f75837a82bfd9c96cd72090b15fa3928efb9cce95f6884203214", "190e1b010d5a53161aa0733b953eb29ef1074070658aaa656f933ded1a177952", "ee791ec8161440262f6e9144d5702f0057cef7e5767bc043879b7c2ff3ff5277", "4c45449ff56582664abfadeb1907756d9bc90601d32387d9cfd4f1ef813b46be", "3b031ed886c6d5220b3e3a28e3261727f3b4f0b29de5f93bc2de3e97938a8a53", "14b533283751e34a8065952fd1cd2c954e3d37aaa69d4b183ac6483481e5497d", "57b28365adaff61aaf60462e917a7cc9931904258127685c18f136eeaebd5d35", "8c0cc19fff6b66980f90af39bee20294bc745baf32cd83199aa83a1f0cd6ca51", "1b408640d54a1409d66ddaf3915a9dc2e8a6227439e8d91d2f74e704ba1cdae2", 48 | Chapter 3: The Bitcoin Client

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