# Cost burden Migration involves fees, primarily is the gas fee. Each transaction on ETH comes with a fee, and the fee will depend on how the[ Smart Contract ](/erc721-migration/smart-contract.md)is written. \ Current estimates ranges are below (calculated by MWSTW and WGV, these are lower/higher bounds, unless new options are discovered) Note that since we are minting in independent order (not sequential 0,1,2), we have to use ERC721, **cannot use ERC721A, and there will not be gas savings for large migrations.** | Current Gas Price (gwei) | Cost Est (1 LEP) | Cost Est \* 7000 LEPs | | ------------------------ | ---------------- | --------------------- | | 10 gwei | .0015 - .003 ETH | 10.5 ETH-21 ETH | | 20 gwei | .003 - .006 ETH | 21 ETH-42 ETH | | 100 gwei | .015-=.03 ETH | 105 ETH-210 ETH | It stands to reason that low gas is better, and perhaps we should **enforce low gas price** for migration. ## Who pays? Simply put, it will be LEP, the community, or a combination of both. Most likely LEP will crowdfund and that will be used for **automated reinbursement of gas on migration.** In short, in the transaction, it will estimate the gas price and transfer the same amount of ETH. The contract would be funded with sufficient ETH. --- # Agent Instructions: 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://docs.lepipedia.xyz/erc721-migration/cost-burden.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.