arno/bitcoinbook
1
0
Fork 0
mirror of https://github.com/bitcoinbook/bitcoinbook synced 2024-12-22 22:58:09 +00:00
Code Issues Releases Wiki Activity

Merge pull request #555 from oboukli/chapter-10-updates

Browse Source 
Fix inconsistent date format
This commit is contained in:
Will Binns 2019-06-19 22:51:56 +02:00 committed by GitHub
commit bfbc62a1a6
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
ch10.asciidoc
View File

@ -402,7 +402,7 @@ By selecting the specific _parent_ block, indicated by the Previous Block Hash f
c91c008c26e50763e9f548bb8b2fc323735f73577effbc55502c51eb4cc7cf2e
----
Jing's mining node will then add a 4-byte timestamp, encoded as a Unix "epoch" timestamp, which is based on the number of seconds elapsed from January 1, 1970, midnight UTC/GMT. The time +1388185914+ is equal to Friday, 27 Dec 2013, 23:11:54 UTC/GMT.
Jing's mining node will then add a 4-byte timestamp, encoded as a Unix "epoch" timestamp, which is based on the number of seconds elapsed since midnight UTC, Thursday, January 1, 1970. The time +1388185914+ is equal to Friday, December 27, 2013, 23:11:54 UTC.
Jing's node then fills in the target, which defines the required Proof-of-Work to make this a valid block. The target is stored in the block as a "target bits" metric, which is a mantissa-exponent encoding of the target. The encoding has a 1-byte exponent, followed by a 3-byte mantissa (coefficient). In block 277,316, for example, the target bits value is +0x1903a30c+. The first part +0x19+ is a hexadecimal exponent, while the next part, +0x03a30c+, is the coefficient. The concept of a target is explained in <<target>> and the "target bits" representation is explained in <<target_bits>>.