> ## Documentation Index
> Fetch the complete documentation index at: https://docs.eco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Glossary

> Definitions of every term used across Eco's docs, in one place.

| Term                         | Definition                                                                                                                                                                                        |
| ---------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Account abstraction (AA)** | Smart-contract accounts that allow flexible transaction rules: batching, social recovery, gas abstraction, multi-sig.                                                                             |
| **Crowd Liquidity**          | Permissionless pool of stablecoin liquidity that solvers can flash-borrow from to fulfill larger intents than their reserves.                                                                     |
| **CCTP**                     | Circle's Cross-Chain Transfer Protocol. Native USDC movement via burn-and-mint with attestation. Used by Eco's [CCTP Prover](/routes/architecture/provers/cctp).                                  |
| **Destination call**         | An onchain action included in an intent's route, executed atomically with the transfer on the destination chain.                                                                                  |
| **ERC-3009**                 | `transferWithAuthorization`, USDC's native gasless transfer standard. Single-tx, signature-based.                                                                                                 |
| **ERC-7683**                 | Standard for cross-chain order protocols. Eco's Portal implements both origin and destination settler interfaces.                                                                                 |
| **Executor**                 | Stateless contract that executes user-specified calls on the destination chain in isolation from the Portal's storage.                                                                            |
| **Flash Intents**            | A configurable Routes mode that settles same-chain stablecoin orders atomically using the user's own funds. Powered by `flashFulfill` via the [Local Prover](/routes/architecture/provers/local). |
| **flashFulfill**             | Same-chain atomic operation that fulfills an intent using the vault's own funds, no solver required. Enabled by the Local Prover. The mechanism behind **Flash Intents**.                         |
| **Gateway**                  | Circle Gateway, Circle's USDC orchestration product. Eco routes deposits into Gateway via [Gateway Fast Deposits](/addresses/gateway-fast-deposits).                                              |
| **Intent**                   | A signed declaration of a desired outcome on a destination chain, fulfilled by a solver.                                                                                                          |
| **Orchestration mode**       | Intent fulfillment without a solver: the user's vaulted funds route through underlying infrastructure at gas cost.                                                                                |
| **Permit3**                  | Multi-chain token-permission protocol. One signature authorizes spending across multiple chains via Unbalanced Merkle Trees.                                                                      |
| **Portal**                   | Eco's main contract on each chain. Non-upgradable factory that handles intent publishing, fulfillment, and reward release.                                                                        |
| **Programmable Address**     | A deterministic CREATE2 address with pre-programmed actions. When funds arrive, the actions execute automatically.                                                                                |
| **Programmable Transaction** | A single transaction with embedded decision logic, reads state, picks paths, executes optimally. Built on [Sauce](/transactions/overview).                                                        |
| **Prover**                   | Source-chain contract that verifies an intent was fulfilled on the destination chain. User-selectable per intent.                                                                                 |
| **Resource lock**            | A per-operation reservation of funds that releases on cryptographic proof. Eco's vaults are resource locks.                                                                                       |
| **Routes**                   | Eco's intent-based product for moving and swapping stablecoins across chains.                                                                                                                     |
| **Sauce**                    | The protocol that powers [Programmable Transactions](/transactions/overview).                                                                                                                     |
| **Settlement mode**          | Intent fulfillment by a solver fronting capital, the default execution path.                                                                                                                      |
| **Solver**                   | An independent operator that fulfills intents in exchange for the source-chain reward.                                                                                                            |
| **Storage proof**            | A cryptographic proof that specific data exists in a blockchain's state, used by some provers for trust-minimized verification.                                                                   |
| **Supertransaction**         | A unit of execution in [Programmable Transactions](/transactions/overview). One transaction, multiple contracts, dynamic decisions, atomic outcome.                                               |
| **Vault**                    | Per-intent escrow contract. Deterministic, non-custodial, releases on proof.                                                                                                                      |