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Documentation Index

Fetch the complete documentation index at: https://eco.com/docs/llms.txt

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A solver is an independent operator that fulfills intents on destination chains in exchange for the reward locked in the source-chain vault. Solvers compete on price and speed; the user gets the best execution; failed solvers lose nothing but gas.

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What a solver does

For each intent, a solver:
  1. Reads the intent from the source chain (or receives it off-chain)
  2. Decides whether the reward covers the destination-chain cost plus margin
  3. Executes the route on the destination chain
  4. Calls a prover to carry proof back to the source
  5. Withdraws the reward from the vault
Most production solvers also run a quoting service — an HTTP endpoint Eco’s quote aggregator calls to get pricing for a candidate intent. See the solver integration guide.

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Competition model

Solvers compete in two ways:
  • Price — best quote on the input/output pair wins the user’s intent
  • Speed — faster fulfillment captures volume from time-sensitive flows
Eco’s quote aggregator queries all registered solvers in parallel and surfaces the best to the user.

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Capital efficiency

Settling intents requires the solver to front capital on the destination chain. Two mechanisms reduce that constraint:
  • Orchestration mode — when no solver is willing to front capital, the user’s vaulted funds move through underlying infrastructure at gas cost. See Settlement vs Orchestration.
  • Crowd Liquidity — solvers can flash-borrow stablecoin liquidity from a permissionless pool to fulfill larger intents than their reserves would otherwise allow. See Crowd Liquidity.

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Becoming a solver

Solvers are permissionless. To register:
  1. Implement the V2 quote endpoints (/api/v2/quote, /api/v2/quote/reverse)
  2. Register your endpoint URLs via POST /api/v1/solverRegistry/registerSolver
  3. Monitor the source-chain Portal for IntentPublished events
  4. Fulfill, prove, withdraw
→ Full guide: Become a solver · Solver Registry API