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Signatory Servers
Signatory servers are the entry points and gatekeepers of order flow into the DFlow ecosystem. They serve the important role of underwriting sources of order flow to ensure only retail order flow come into the system. Toxic order flow are trades from informed sources which erode market maker profitability.

Functions and roles of signatory servers

Signatory servers are a decentralized system of servers that host API endpoints. To route order flow to DFlow, wallets, swappers, and other sources of order flow send their orders to signatory servers, which endorse the orders to allow them to be sent to DFlow.
Prevent informed order flow from entering the DFlow system
A signature from a signatory server endorses the flow as non-toxic and prevents toxic sources from taking liquidity from market makers.
Distribute API keys to retail flow sources
Retail clients will need an API key to start sending orders to signatory servers. Signatory servers are responsible for distributing API keys to appropriate sources. In return, signatory servers are compensated for underwriting risks.

Signatory server incentive structure

Signatory servers are required to stake a large amount of value in the form of tokens in the DFlow Protocol to obtain a private endorsement key to sign transactions from clients. Signatory servers can be operated by anyone willing to stake the requisite amount with the protocol. Furthermore, signatory server operators will receive a rebate from the network for each order they endorse as retail flow, allowing them to earn a large yield on their staked tokens.
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Outline
Functions and roles of signatory servers
Signatory server incentive structure