> For the complete documentation index, see [llms.txt](https://docs.arcology.network/arcology-architecture-overview/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arcology.network/arcology-architecture-overview/gateway.md).

# Gateway

Arcology transactions come from either end users or network peers. The gateway service is the first step for all transactions to enter into the system. It determines which transactions will make it through to the processing workflow based on a set of selection strategies.