> ## Documentation Index > Fetch the complete documentation index at: https://docs.compasslabs.ai/llms.txt > Use this file to discover all available pages before exploring further. # Build the Bridge2 deposit tx from a signed permit > Build the Arbitrum tx that completes a USDC deposit to HL. Takes the EIP-2612 permit signature returned by /deposit and returns a fully-encoded `Bridge2.batchedDepositWithPermit` call. The integrator's sponsor wallet (`sender`) broadcasts the returned tx — Compass does not broadcast and does not hold gas keys. ## OpenAPI ````yaml /v2/combined_spec.json post /v2/global_markets_perps/deposit/sponsor_prepare openapi: 3.1.0 info: title: Compass API description: Compass Labs DeFi API version: 0.0.1 servers: - url: https://api.compasslabs.ai description: Production server security: - ApiKeyAuth: [] paths: /v2/global_markets_perps/deposit/sponsor_prepare: post: tags: - Global Markets Perps summary: Build the Bridge2 deposit tx from a signed permit description: >- Build the Arbitrum tx that completes a USDC deposit to HL. Takes the EIP-2612 permit signature returned by /deposit and returns a fully-encoded `Bridge2.batchedDepositWithPermit` call. The integrator's sponsor wallet (`sender`) broadcasts the returned tx — Compass does not broadcast and does not hold gas keys. operationId: v2_global_markets_perps_deposit_sponsor_prepare requestBody: content: application/json: schema: $ref: >- #/components/schemas/GlobalMarketsPerpsDepositSponsorPrepareRequest required: true responses: '200': description: Successful Response content: application/json: schema: $ref: >- #/components/schemas/GlobalMarketsPerpsDepositSponsorPrepareResponse '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' x-codeSamples: - lang: python label: Python (SDK) source: |- from compass_api_sdk import CompassAPI with CompassAPI( api_key_auth="", ) as compass_api: res = compass_api.global_markets_perps.global_markets_perps_deposit_sponsor_prepare(owner="0x06A9aF046187895AcFc7258450B15397CAc67400", amount_raw=100000000, deadline=1747097383, signature="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", sender="0x4A83b4413CF41C3244027e1590E35a0F48403F0c") # Handle response print(res) - lang: typescript label: Typescript (SDK) source: |- import { CompassApiSDK } from "@compass-labs/api-sdk"; const compassApiSDK = new CompassApiSDK({ apiKeyAuth: "", }); async function run() { const result = await compassApiSDK.globalMarketsPerps.globalMarketsPerpsDepositSponsorPrepare({ owner: "0x06A9aF046187895AcFc7258450B15397CAc67400", amountRaw: 100000000, deadline: 1747097383, signature: "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", sender: "0x4A83b4413CF41C3244027e1590E35a0F48403F0c", }); console.log(result); } run(); components: schemas: GlobalMarketsPerpsDepositSponsorPrepareRequest: properties: owner: type: string title: Owner description: The user's EOA address on Arbitrum (the permit signer). default: '0x06A9aF046187895AcFc7258450B15397CAc67400' examples: - '0x06A9aF046187895AcFc7258450B15397CAc67400' amount_raw: type: integer exclusiveMinimum: 0 title: Amount Raw description: USDC amount in raw 6-decimal units, as returned by /deposit. default: 100000000 examples: - 100000000 deadline: type: integer exclusiveMinimum: 0 title: Deadline description: >- Permit deadline (unix seconds), as returned in the permit.message from /deposit. default: 1747097383 examples: - 1747097383 signature: type: string title: Signature description: >- The user's EIP-2612 permit signature (65-byte hex, 0x-prefixed or raw). default: >- 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 examples: - >- 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 sender: type: string title: Sender description: >- Sponsor wallet address that will broadcast the returned tx (used for `from` and nonce). default: '0x4A83b4413CF41C3244027e1590E35a0F48403F0c' examples: - '0x4A83b4413CF41C3244027e1590E35a0F48403F0c' type: object required: - owner - amount_raw - deadline - signature - sender title: GlobalMarketsPerpsDepositSponsorPrepareRequest description: |- Take a user's signed EIP-2612 USDC permit and build an Arbitrum tx that calls Bridge2.batchedDepositWithPermit. The customer broadcasts the returned tx from their own sponsor wallet — Compass does not hold gas keys (non-custodial). default: owner: '0x06A9aF046187895AcFc7258450B15397CAc67400' amount_raw: 100000000 deadline: 1747097383 signature: >- 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 sender: '0x4A83b4413CF41C3244027e1590E35a0F48403F0c' GlobalMarketsPerpsDepositSponsorPrepareResponse: properties: transaction: $ref: '#/components/schemas/UnsignedTransaction' description: >- Unsigned Arbitrum tx calling Bridge2.batchedDepositWithPermit. Sign and broadcast from `sender`. type: object required: - transaction title: GlobalMarketsPerpsDepositSponsorPrepareResponse description: >- Fully-encoded Arbitrum tx that completes a HL Bridge2 deposit. Broadcast `transaction` from the `sender` wallet supplied in the request. After the receipt confirms, verify a USDC `Transfer` event was emitted — Bridge2 can silently no-op without reverting. example: transaction: chainId: '0xa4b1' data: 0x... from: '0x4A83b4413CF41C3244027e1590E35a0F48403F0c' gas: '0x30d40' maxFeePerGas: '0x59682f00' maxPriorityFeePerGas: '0x3b9aca00' nonce: '0x5' to: '0x2Df1c51E09aECF9cacB7bc98cB1742757f163dF7' value: '0x0' HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError UnsignedTransaction: properties: chainId: type: string title: Chainid description: The chain id of the transaction data: type: string title: Data description: The data of the transaction from: type: string title: From description: The sender of the transaction gas: anyOf: - type: string - type: 'null' title: Gas description: The gas of the transaction to: type: string title: To description: The recipient of the transaction value: type: string title: Value description: The value of the transaction nonce: type: string title: Nonce description: The nonce of the address maxFeePerGas: type: string title: Maxfeepergas description: The max fee per gas of the transaction maxPriorityFeePerGas: type: string title: Maxpriorityfeepergas description: The max priority fee per gas of the transaction type: object required: - chainId - data - from - gas - to - value - nonce - maxFeePerGas - maxPriorityFeePerGas title: UnsignedTransaction example: chainId: '0x2105' data: >- 0x1688f0b900000000000000000000000029fcb43b46531bca003ddc8fcb67ffe91900c762000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000675f4a3d from: '0x4A83b4413CF41C3244027e1590E35a0F48403F0c' gas: '0x7a120' maxFeePerGas: '0x59682f00' maxPriorityFeePerGas: '0x3b9aca00' nonce: '0x5' to: '0x4e1DCf7AD4e460CfD30791CCC4F9c8a4f820ec67' value: '0x0' ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type type: object required: - loc - msg - type title: ValidationError securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: >- Your Compass API Key. Get your key [here](https://www.compasslabs.ai/dashboard). ````