# This uses 3 build processes, you need 2GB of RAM for each.
./build.sh -j3
```
### Building On Ubuntu 16.04 and older systems
Some older compilers may not be able to compile modern code, such as gcc 5.4 which comes with Ubuntu 16.04 by default. Here is how to install gcc 7 on Ubuntu 16.04. Run these commands as root:
@ -67,7 +67,7 @@ HUSH RandomX currently has two advanced options that some may want to use:
This section is not required reading if you just want to use it as a PoW algorithm for an HSC. Here we will explain how the internals of RandomX works inside of the Hush codebase.
We use the official RandomX implementation from https://github.com/tevador/RandomX with custom configuration options. If some type of hardware is created to mine the XMR RandomX algorithm, it will not be compatible with the Hush RandomX algorithm. This is by design. All Hush Smart Chains use the same RandomX config options, so if a hardware device is created to mine one HSC that uses RandomX, it can be used to mine any HSC using RandomX. Every HSC with unique consensus parameters will start off with it's own unique key block with at least 9 bytes of entropy.
We use the official RandomX implementation from https://github.com/tevador/RandomX with custom configuration options. If some type of hardware is created to mine the XMR RandomX algorithm, it will not be compatible with the Hush RandomX algorithm. This is by design. All Hush Arrakis Chains use the same RandomX config options, so if a hardware device is created to mine one HSC that uses RandomX, it can be used to mine any HSC using RandomX. Every HSC with unique consensus parameters will start off with it's own unique key block with at least 9 bytes of entropy.
The source code of RandomX is embedded in the Hush source code at `./src/RandomX` and the configuration options used are at `./src/RandomX/src/configuration.h` .
/// Creates a token transaction output with a cryptocondition that allows to spend it by one key.
/// The resulting vout will have two eval codes (EVAL_TOKENS and evalcode parameter value).
/// The returned output should be added to a transaction vout array.
/// @param evalcode cryptocondition eval code (transactions with this eval code in cc inputs will be forwarded to the contract associated with this eval code)
/// Another MakeTokensCC1vout overloaded function that creates a token transaction output with a cryptocondition with two eval codes that allows to spend it by one key.
/// Resulting vout will have three eval codes (EVAL_TOKENS, evalcode and evalcode2 parameter values).
/// The returned output should be added to a transaction vout array.
/// @param evalcode cryptocondition eval code (transactions with this eval code in cc inputs will be forwarded to the contract associated with this eval code)
/// @param evalcode2 yet another cryptocondition eval code (transactions with this eval code in cc inputs will be forwarded to the contract associated with this eval code)
/// MakeTokensCC1of2vout creates a token transaction output with a 1of2 cryptocondition that allows to spend it by either of two keys.
/// The resulting vout will have two eval codes (EVAL_TOKENS and evalcode parameter value).
/// The returned output should be added to a transaction vout array.
/// @param evalcode cryptocondition eval code (transactions with this eval code in cc inputs will be forwarded to the contract associated with this eval code)
/// @param nValue value of the output in satoshi
/// @param pk1 one of two pubkeys to spend the cc
/// @param pk2 second of two pubkeys to spend the cc
/// Another overload of MakeTokensCC1of2vout creates a token transaction output with a 1of2 cryptocondition with two eval codes that allows to spend it by either of two keys.
/// The resulting vout will have three eval codes (EVAL_TOKENS, evalcode and evalcode2 parameter values).
/// The returned output should be added to a transaction vout array.
/// @param evalcode cryptocondition eval code (transactions with this eval code in cc inputs will be forwarded to the contract associated with this eval code)
/// @param evalcode2 yet another cryptocondition eval code (transactions with this eval code in cc inputs will be forwarded to the contract associated with this eval code)
/// @param nValue value of the output in satoshi
/// @param pk1 one of two pubkeys to spend the cc
/// @param pk2 second of two pubkeys to spend the cc
