Intent centric protocols rely on Fillers to facilitate the execution of orders on their platform. One measure of the health of an Intent centric protocol is the number of Fillers that regularly fill orders and the extent to which these Fillers compete with each other to provide the best possible execution quality for user orders. Having a small number (or even one) of Fillers is a significant risk factor to the protocol.
There are only a small overall number of Fillers. There is still a risk of monopolistic filling and protocol censorship as well as likely result in execution quality suffering leading to the user receiving a worse price than they might have otherwise.
Whilst most protocols are open and encourage free permissionless participation by any entity wishing to contribute bids for orderflow, some may require Fillers to apply and be whitelisted before they can access orderflow. Having a permissioned system increases risks of centralisation and heightens the risk of Censorship and amplifies the consequences of Filler Failure since it is not straight forward to for a new entity step in to provide bids for 'stuck' orders should no Fillers be available.
DLN allows any participant to perform Filling actions and provides comprehensive code (https://github.com/debridge-finance/dln-taker) to get Fillers up and running quickly.
Fillers often run sophisticated selection criteria to determine what orders they will fill and under what circumstances. Fillers additionally need to own sufficient inventory of the tokens on the appropriate chain to be able to execute an order they are bidding imposing limits on the competitiveness of filling entities based on their treasure and inventory management practices. As a result the range of orders that are filled differ between Fillers and can cause uncontested orders based on a number of factors including order value. It is not uncommon to see a tail off in Filler competition towards the higher value range.
More than one order value range is only filled by a single Filler. This represents an increased risk of monopolistic filling and will likely result in execution quality suffering and the user receiving a worse price than they might have otherwise.
The distribution of tokens filled by each Filler, based on the USD value of orders. It provides insights into which tokens are most frequently provided by different Fillers and highlights any specialization or concentration in specific tokens. A diverse range of tokens across Fillers indicates a healthy ecosystem, while a high concentration in particular tokens or Fillers may suggest potential liquidity or centralization risks.