> ## Documentation Index > Fetch the complete documentation index at: https://docs.li.fi/llms.txt > Use this file to discover all available pages before exploring further. # Perform multiple contract calls across blockchains (BETA) > This endpoint can be used to bridge tokens, swap them and perform a number or arbitrary contract calls on the destination chain. You can find an example of it [here](https://github.com/lifinance/sdk/tree/main/examples). This functionality is currently in beta. While we've worked hard to ensure its stability and functionality, there might still be some rough edges. ## OpenAPI ````yaml post /v1/quote/contractCalls openapi: 3.0.2 info: title: LI.FI API version: 1.0.0 description: >- LI.FI provides the best cross-chain swap across all liquidity pools and bridges. servers: - url: https://li.quest description: LI.FI Production Environment - url: https://staging.li.quest description: LI.FI Staging Environment security: [] paths: /v1/quote/contractCalls: post: summary: Perform multiple contract calls across blockchains (BETA) description: >- This endpoint can be used to bridge tokens, swap them and perform a number or arbitrary contract calls on the destination chain. You can find an example of it [here](https://github.com/lifinance/sdk/tree/main/examples). This functionality is currently in beta. While we've worked hard to ensure its stability and functionality, there might still be some rough edges. parameters: - name: x-lifi-api-key description: The apiKey allows you to authenticate on the API. schema: type: string in: header requestBody: description: >- Object describing what tokens to transfer and how to interact with the destination contracts. content: application/json: schema: $ref: '#/components/schemas/ContractCallsRequest' example: fromChain: 10 fromToken: '0x4200000000000000000000000000000000000042' fromAddress: '0x552008c0f6870c2f77e5cC1d2eb9bdff03e30Ea0' toChain: 1 toToken: ETH toAmount: '100000000000001' contractCalls: - fromAmount: '100000000000001' fromTokenAddress: '0x0000000000000000000000000000000000000000' toTokenAddress: '0xae7ab96520de3a18e5e111b5eaab095312d7fe84' toContractAddress: '0xae7ab96520de3a18e5e111b5eaab095312d7fe84' toContractCallData: 0x toContractGasLimit: '110000' - fromAmount: '100000000000000' fromTokenAddress: '0xae7ab96520de3a18e5e111b5eaab095312d7fe84' toTokenAddress: '0x7f39c581f595b53c5cb19bd0b3f8da6c935e2ca0' toContractAddress: '0x7f39c581f595b53c5cb19bd0b3f8da6c935e2ca0' toFallbackAddress: '0x552008c0f6870c2f77e5cC1d2eb9bdff03e30Ea0' toContractCallData: >- 0xea598cb000000000000000000000000000000000000000000000000000005af3107a4000 toContractGasLimit: '100000' integrator: muc-hackaton-postman responses: '200': $ref: '#/components/responses/ToolsResponse' components: schemas: ContractCallsRequest: title: Root type for ContractCallsRequest description: >- Object defining instructions on how to perform multiple cross-chain/same-chain calls required: - fromChain - fromToken - fromAddress - toChain - toToken - toAmount - contractCalls type: object properties: fromChain: description: The sending chain. Can be the chain id or chain key type: number fromToken: description: >- The token that should be transferred. Can be the address or the symbol type: string fromAddress: description: >- The wallet that will send the transaction and contains the starting token type: string toChain: description: The receiving chain. Can be the chain id or chain key type: number toToken: description: >- The token required to perform the contract interaction (can be something to stake, donate or to be used as payment) type: string toAmount: description: >- The amount of token required by the contract interaction. The LI.FI API will try and generate a quote that guarantees at least that amount on the destination chain. type: string contractCalls: type: array items: $ref: '#/components/schemas/ContractCall' toFallbackAddress: description: >- If the call fails, use this address to send the bridged tokens to. If none is specified, the sending address will be used. type: string contractOutputsToken: description: >- Some contract interactions will output a token. This is the case in things like staking. Omit this parameter if no token should be returned to the user. type: string slippage: format: double description: >- The maximum allowed slippage for the transaction as a decimal value. 0.005 represents 0.5%. maximum: 1 minimum: 0 type: number integrator: description: >- A string containing tracking information about the integrator of the API type: string referrer: description: >- A string containing tracking information about the referrer of the integrator type: string allowBridges: description: >- List of bridges that are allowed for this transaction. Retrieve the current catalog from the `/v1/tools` endpoint. type: array items: type: string denyBridges: description: >- List of bridges that are not allowed for this transaction. Retrieve the current catalog from the `/v1/tools` endpoint. type: array items: type: string preferBridges: description: >- List of bridges that should be preferred for this transaction. Retrieve the current catalog from the `/v1/tools` endpoint. type: array items: type: string allowExchanges: description: >- List of exchanges that are allowed for this transaction. Retrieve the current catalog from the `/v1/tools` endpoint. type: array items: type: string denyExchanges: description: >- List of exchanges that are not allowed for this transaction. Retrieve the current catalog from the `/v1/tools` endpoint. type: array items: type: string preferExchanges: description: >- List of exchanges that should be preferred for this transaction. Retrieve the current catalog from the `/v1/tools` endpoint. type: array items: type: string allowDestinationCall: description: >- Whether swaps or other contract calls should be allowed as part of the destination transaction of a bridge transfer. Separate swap transactions on the destination chain are not affected by this flag. By default, parameter is `true`. type: boolean fee: format: double description: >- The percent of the integrator's fee that is taken from every transaction. The maximum fee amount should be less than 100%. maximum: 1 exclusiveMaximum: true minimum: 0 type: number ContractCall: title: Root Type for ContractCall description: Object defining a single arbitrary contract call required: - fromAmount - fromTokenAddress - toContractAddress - toContractCallData - toContractGasLimit type: object properties: fromAmount: description: >- The amount that will feed into this contract call. This is not dependent on how much was bridged or deposited before - it's the *expected* amount of token available on order to execute the call. type: string fromTokenAddress: description: >- The token that will feed into this contract call. E.g. a ETH staking transaction would expect to have ETH available. type: string toContractAddress: description: The address of the contract to interact with. type: string toContractCallData: description: >- The calldata to be sent to the contract for the interaction on the destination chain. type: string toContractGasLimit: description: >- The estimated gas used by the destination call. If this value is incorrect, the interaction may fail -- choose this carefully! type: string toApprovalAddress: description: >- If the approval address is different thant the contract to call, specify that address here type: string toTokenAddress: description: >- If the contract outputs a token, specify its address here. (E.g. staking ETH produces stETH) type: string Tools: type: object properties: exchanges: type: array items: $ref: '#/components/schemas/Exchange' bridges: type: array items: $ref: '#/components/schemas/Bridge' Exchange: type: object properties: key: $ref: '#/components/schemas/ExchangesEnum' name: description: The common name of the tool type: string example: 0x logoURI: description: The logo of the tool type: string example: >- https://raw.githubusercontent.com/lifinance/types/main/src/assets/icons/exchanges/zerox.svg supportedChains: description: The chains which are supported on this exchange type: string example: - '1' - '137' - '56' Bridge: type: object properties: key: $ref: '#/components/schemas/BridgesEnum' name: description: The common name of the tool type: string example: Connext logoURI: description: The logo of the tool type: string example: >- https://raw.githubusercontent.com/lifinance/types/main/src/assets/icons/bridges/relay.svg supportedChains: type: array items: $ref: '#/components/schemas/SupportedChains' ExchangesEnum: type: string description: >- Identifier for an exchange tool. Retrieve the latest exchange keys from the `/v1/tools` endpoint. Keywords such as `all`, `none`, `default`, and `[]` are also supported where applicable. BridgesEnum: type: string description: >- Identifier for a bridge tool. Retrieve the latest bridge keys from the `/v1/tools` endpoint. Keywords such as `all`, `none`, `default`, and `[]` are also supported where applicable. SupportedChains: type: object properties: fromChainId: description: Supported `from` chain type: string example: 137 toChainId: description: Supported `to` chain type: string example: 1 responses: ToolsResponse: content: application/json: schema: $ref: '#/components/schemas/Tools' description: Object listing all the currently enabled bridges and exchanges. ````