> For the complete documentation index, see [llms.txt](https://mantabridge.gitbook.io/manta-bridge-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mantabridge.gitbook.io/manta-bridge-docs/glossary.md). # glossary Plain-language definitions for terms you may see while using [Manta Bridge](https://mantabridge.cc/) to move assets between Ethereum and Manta Pacific. For live fees, transaction prompts, supported assets, and route status, always verify the bridge interface and your wallet before confirming. ## Bridge Terms | Term | Meaning | | -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Manta Bridge | The bridge app used to move supported assets, such as ETH and USDC, between Ethereum L1 and Manta Pacific L2. | | Bridge | A system that transfers assets or messages between chains. In a bridge flow, you usually submit a transaction on the source chain and receive or finalize assets on the destination chain. | | Deposit | A bridge action that moves assets from Ethereum L1 to Manta Pacific L2. See [How Manta Bridge Works](/manta-bridge-docs/getting-started/how-it-works.md) for the deposit flow. | | Withdrawal | A bridge action that moves assets from Manta Pacific L2 back to Ethereum L1. Withdrawals follow the rollup exit model and may require a later finalization step. | | Token approval | Permission that lets a contract move a specific ERC-20 token amount from your wallet. ERC-20 bridge transfers usually need approval before the bridge transaction. See [Token Approvals](/manta-bridge-docs/guides/token-approvals.md). | | Finality | The point when a transaction or bridge step is considered complete for the purpose of the flow. For rollup withdrawals, finality depends on the exit and challenge process, not just the first wallet confirmation. | ## Network Terms | Term | Meaning | | ------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Manta Pacific | A modular Ethereum Layer 2 network that uses OP Stack execution and Celestia data availability. Learn more in [What Is Manta Pacific?](/manta-bridge-docs/what-is-manta-pacific.md). | | Layer 2 (L2) | A network built on or connected to Ethereum that processes transactions outside Ethereum L1 while using Ethereum for settlement or security guarantees. | | Rollup | An L2 design that executes transactions off Ethereum L1, batches data or commitments, and uses L1 contracts as part of the settlement and verification model. Rollup withdrawals commonly include an exit and finalization flow. | | OP Stack | The open-source software stack used by optimistic-rollup-style chains in the Optimism ecosystem. Manta Pacific uses OP Stack execution. See the [OP Stack documentation](https://docs.optimism.io/stack/getting-started). | | Modular blockchain | A blockchain design that separates core functions such as execution, settlement, consensus, and data availability instead of handling every function in one layer. | ## Data and Gas Terms | Term | Meaning | | ---------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Celestia | A modular data availability network used by Manta Pacific for publishing transaction data. Celestia describes this role in its [data availability documentation](https://docs.celestia.org/learn/celestia-101/data-availability/). | | Data availability (DA) | The requirement that transaction data is published and accessible so network participants can verify the chain state. DA is separate from executing transactions. | | Gas token | The asset used to pay network transaction fees. On Manta Pacific, the gas token is ETH. See [Manta Pacific Gas Fees](/manta-bridge-docs/reference/gas-fees.md). | | ETH | Ethereum's native asset. ETH is used for gas on Ethereum L1 and also as the gas token on Manta Pacific. Bridging USDC does not automatically give you ETH for later L2 gas. | ## Quick Checks * Depositing means Ethereum L1 -> Manta Pacific L2. * Withdrawing means Manta Pacific L2 -> Ethereum L1. * ETH pays gas on Manta Pacific. * ERC-20 tokens, such as USDC, may require approval before bridging. * Static docs cannot guarantee current fees, timing, or route status; verify live before signing. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://mantabridge.gitbook.io/manta-bridge-docs/glossary.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.