Stackjoins are labor intensive at the moment and use humans to scrape Twitter for tagged buys. They then add the URL, Twitter Handle, and dollar value to a Google Sheet.
How Does A Stackjoin Work?
If the currant stackheight is $1731 but a Stackchainer has only $100 to stack they can not stack $1732 because they are short $1632 but they can still participate by adding their $100 stack with the stacks of others until they collectively reach $1732. At which point the "Stacks" are "joined"
The current process for a Stackjoins
Stackchainer makes a Bitcoin purchase taking a screen shot of the receipt.
Stackchainer posts their stackjoin with the $amount and the hashtag #Stackjoin
A volunteer mempool node manages stackjoins adds the stack to the Mempool.
The nodes that manage the Mempool then build a stack (block) when the Mempool has a sufficient combination of stacks that equal the necessary dollar amount to stack the next stack on the stackchain.
The node then posts the receipts of all stacks in a new "stackjoined" block on the stackchain.
There are variations. Some stackjoiners may choose to build a stackjoin themselves without submission of their stacks to the Mempool.
Problems To Be Solved
Currently the process is labor intensive and relies on a small number of nodes.
As the stackheight increases the difficulty adjustment of solo mining a stack also increases.
The result is:
Fewer miners will be able to solo mine
More stacks will be stackjoins involving greater numbers of smaller stacks.
The functions needed to be built or improved on are as follows:
Stackchainers can enter stacks into the dashboard that are designated for stackjoins.
Bots could be used to enter stacks into the Dashboard by searching for #Stackjoin
The Dashboard will not accept duplicate stacks and notify users that the stack was already entered.
The dashboard will organize the stacks that have been entered and present them in a way where Stackchainers can validate
If requested the Dashboard can organize the stacks into a desired block height. And format a stackjoin so it can be posted to the tip by a user.