# Supported Chains

## Payments

The payment proxy smart contracts enable the various payment types.

The most widely deployed payment proxy is the ERC20FeeProxy. The most frequently used payment proxy is the ERC20ConversionProxy.

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For an explanation of what each smart contract does, see [contracts](https://docs.request.network/advanced/protocol-overview/contracts "mention")
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Make sure to scroll horizontally to see all the payment proxy types! :wink:
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<table data-full-width="true"><thead><tr><th width="191">Chain</th><th>Chain Name</th><th>Chain ID</th><th data-type="checkbox">ERC20FeeProxy</th><th data-type="checkbox">EthereumFeeProxy</th><th data-type="checkbox">Erc20ConversionProxy</th><th data-type="checkbox">EthConversionProxy</th><th data-type="checkbox">BatchConversionPayments</th><th data-type="checkbox">ERC20SwapToPay</th><th data-type="checkbox">Erc20SwapToConversion</th><th data-type="checkbox">ERC20TransferableReceivable</th><th data-type="checkbox">ERC20EscrowToPay</th><th data-type="checkbox">ERC20Proxy</th><th data-type="checkbox">EthereumProxy</th><th data-type="checkbox">BatchPayments (deprecated)</th></tr></thead><tbody><tr><td>Ethereum Mainnet</td><td>mainnet</td><td>1</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td></tr><tr><td>Sepolia</td><td>sepolia</td><td>11155111</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>true</td><td>true</td><td>true</td><td>false</td></tr><tr><td>Goerli (deprecated)</td><td>goerli</td><td>5</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Optimism</td><td>optimism</td><td>10</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>true</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Arbitrum One</td><td>arbitrum-one</td><td>42161</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Base</td><td>base</td><td>8453</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>false</td><td>true</td><td>true</td><td>false</td></tr><tr><td>zkSync Era</td><td>zksyncera</td><td>324</td><td>true</td><td>true</td><td>false</td><td>false</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>zkSync Goerli (deprecated)</td><td>zksynceratestnet</td><td>280</td><td>true</td><td>true</td><td>false</td><td>false</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>Gnosis</td><td>xdai</td><td>100</td><td>true</td><td>true</td><td>true</td><td>false</td><td>true</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Polygon</td><td>matic</td><td>137</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Mumbai</td><td>mumbai</td><td>80001</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>BSC</td><td>bsc</td><td>56</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td></tr><tr><td>BSC Testnet</td><td>bsctest</td><td>97</td><td>true</td><td>false</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>Celo</td><td>celo</td><td>42220</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Alfajores</td><td>alfajores</td><td>44787</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>Fantom</td><td>fantom</td><td>250</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Tombchain</td><td>tombchain</td><td>6969</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>Core</td><td>core</td><td>1116</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td><td>false</td></tr><tr><td>Avalanche</td><td>avalanche</td><td>43114</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Fuse</td><td>fuse</td><td>122</td><td>true</td><td>true</td><td>false</td><td>false</td><td>true</td><td>true</td><td>false</td><td>false</td><td>true</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Moonbeam</td><td>moonbeam</td><td>1284</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>true</td><td>false</td><td>true</td><td>false</td><td>true</td><td>false</td></tr><tr><td>Ronin</td><td>ronin</td><td>2020</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>Mantle</td><td>mantle</td><td>5000</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td><td>false</td></tr><tr><td>Mantle Testnet</td><td>mantle-testnet</td><td>5001</td><td>true</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>true</td><td>true</td><td>false</td></tr><tr><td>NEAR</td><td>N/A</td><td>N/A</td><td>true</td><td>true</td><td>false</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr><tr><td>NEAR Testnet</td><td>N/A</td><td>N/A</td><td>true</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td><td>false</td></tr></tbody></table>

## Storage

These smart contracts facilitate storing IPFS content addressable hashes (CIDs) on-chain.

<table data-full-width="true"><thead><tr><th width="194">Chain</th><th width="98">Chain ID</th><th data-type="checkbox">RequestHashStorage</th><th data-type="checkbox">RequestOpenHashSubmitter</th></tr></thead><tbody><tr><td>Gnosis</td><td>100</td><td>true</td><td>true</td></tr><tr><td>Sepolia</td><td>11155111</td><td>true</td><td>true</td></tr><tr><td>Ethereum Mainnet (deprecated)</td><td>1</td><td>true</td><td>true</td></tr><tr><td>Goerli (deprecated)</td><td>5</td><td>true</td><td>true</td></tr></tbody></table>

## REQ Token and Burn Mechanism

The REQ Token is on Ethereum Mainnet. The burn contracts facilitate locking xDAI on Gnosis, bridging xDAI to Ethereum, swapping xDAI for REQ, and burning the REQ.

<table data-full-width="true"><thead><tr><th width="195.33333333333337">Chain</th><th width="100">Chain ID</th><th data-type="checkbox">lockForREQBurn</th><th data-type="checkbox">DaiBasedREQBurner</th><th data-type="checkbox">RequestToken</th></tr></thead><tbody><tr><td>Ethereum Mainnet</td><td>1</td><td>false</td><td>true</td><td>true</td></tr><tr><td>Gnosis</td><td>100</td><td>true</td><td>false</td><td>false</td></tr></tbody></table>