What triggers a transaction to be recorded on the Blockchain?

I am new to blockchain development. I am trying to understand where, when, and how a transaction is sent to the blockchain to be recorded. Here is the sample code I am studying: pragma solidity ^0.4.21; import “./EIP20Interface.sol”; contract EIP20 is EIP20Interface { uint256 constant private MAX_UINT256 = 2**256 – 1; mapping (address => uint256)…

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Finding non-cross-platform statements in a C program [closed]

I wrote something in C for linux which works fine. One day, I tried compiling it on macOS, and to my surprise, it compiled without any warnings, using both gcc and clang (compiler flags: -std=gnu99 -pedantic -Wall -Wshadow -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes). Even compiling with options -std=gnu99 -Weverything in clang shows only a few struct…

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Solaris/Omnios: Can su as SMB domain user but all commands ‘permission denied’

I’m on omnios-r151032-19f7bd2ae5, which is most similar to OpenSolaris 10 (It’s an illumos fork) I have set up sharesmb + sharectl + kclient ms_ad, etc. in order to be able to getent passwd [email protected] Example: [email protected]:/etc# getent passwd [email protected] [email protected]:x:2147483649:2147483650:Avery Freeman::/bin/bash and I can su as user, but I get ‘permission denied’ response for every…

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iptables v1.6.1: ! not allowed with multiple source or destination IP addresses

I have a docker elastic search cluster running on Ubuntu, since docker writes directly to iptables and by default allows connections from any ip address I am trying to add rules to the iptables to only allow connections from 2x specific ip addresses. iptables -I DOCKER-USER -i ens160 ! -s 192.168.10.10,192.168.11.69 -j DROP When I…

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