> ## Documentation Index > Fetch the complete documentation index at: https://cobo.com/developers/llms.txt > Use this file to discover all available pages before exploring further. # Expand Babylon BTC staking > This operation initiates a Babylon BTC staking expansion request. Before calling this operation, please ensure the following: - The BTC staking position is active. - The finality provider public keys are valid. Each BSN chain can have at most one finality provider public key. The system first checks whether the provided BTC staking position is active. If active, it creates a new BTC staking position for the Phase-3 expansion. The expansion is processed asynchronously and may take some time to complete. For more information, refer to [Babylon's official doc](https://github.com/babylonlabs-io/babylon/tree/main/docs). Try [Cobo WaaS Skill](/v2/guides/overview/cobo-waas-skill) in your AI coding assistant (Claude Code, Cursor, etc.). Describe your needs in natural language to auto-generate production-ready SDK code and debug faster 🚀 ```python Python theme={null} import cobo_waas2 from cobo_waas2.models.babylon_create_staking_expansion import ( BabylonCreateStakingExpansion, ) from cobo_waas2.models.stakings import Stakings from cobo_waas2.rest import ApiException from pprint import pprint # See configuration.py for a list of all supported configurations. configuration = cobo_waas2.Configuration( # Replace `` with your private key api_private_key="", # Select the development environment. To use the production environment, change the URL to https://api.cobo.com/v2. host="https://api.dev.cobo.com/v2", ) # Enter a context with an instance of the API client with cobo_waas2.ApiClient(configuration) as api_client: # Create an instance of the API class api_instance = cobo_waas2.StakingsApi(api_client) babylon_create_staking_expansion = cobo_waas2.BabylonCreateStakingExpansion( staking_id="3f2840ce-44eb-450b-aa81-d3f84b772efb", finality_provider_public_keys=[ "eca1b104dce16c30705f4147a9c4a373ac88646c5d1bcda6a89c018940cb96a0" ], fee=cobo_waas2.TransactionRequestFee( cobo_waas2.TransactionRequestFixedFee( fee_type="EVM_EIP_1559", token_id="TRON" ) ), ) try: # Expand Babylon BTC staking api_response = api_instance.create_babylon_staking_expansion( babylon_create_staking_expansion=babylon_create_staking_expansion ) print("The response of StakingsApi->create_babylon_staking_expansion:\n") pprint(api_response) except Exception as e: print( "Exception when calling StakingsApi->create_babylon_staking_expansion: %s\n" % e ) ``` ```java Java theme={null} // Import classes: import com.cobo.waas2.ApiClient; import com.cobo.waas2.ApiException; import com.cobo.waas2.Configuration; import com.cobo.waas2.Env; import com.cobo.waas2.api.StakingsApi; import com.cobo.waas2.model.*; import java.util.Arrays; public class Example { public static void main(String[] args) { ApiClient defaultClient = Configuration.getDefaultApiClient(); // Select the development environment. To use the production environment, replace `Env.DEV` with // `Env.PROD defaultClient.setEnv(Env.DEV); // Replace `` with your private key defaultClient.setPrivKey(""); StakingsApi apiInstance = new StakingsApi(); BabylonCreateStakingExpansion babylonCreateStakingExpansion = new BabylonCreateStakingExpansion() .stakingId("3f2840ce-44eb-450b-aa81-d3f84b772efb") .finalityProviderPublicKeys( Arrays.asList("eca1b104dce16c30705f4147a9c4a373ac88646c5d1bcda6a89c018940cb96a0")) .fee( new TransactionRequestFee( new TransactionRequestFixedFee() .feeType(FeeType.EVM_EIP_1559) .tokenId("TRON"))); try { Stakings result = apiInstance.createBabylonStakingExpansion(babylonCreateStakingExpansion); System.out.println(result); } catch (ApiException e) { System.err.println("Exception when calling StakingsApi#createBabylonStakingExpansion"); System.err.println("Status code: " + e.getCode()); System.err.println("Reason: " + e.getResponseBody()); System.err.println("Response headers: " + e.getResponseHeaders()); e.printStackTrace(); } } } ``` ```go Go theme={null} package main import ( "context" "fmt" coboWaas2 "github.com/CoboGlobal/cobo-waas2-go-sdk/cobo_waas2" "github.com/CoboGlobal/cobo-waas2-go-sdk/cobo_waas2/crypto" "os" ) func main() { babylonCreateStakingExpansion := *coboWaas2.NewBabylonCreateStakingExpansion("3f2840ce-44eb-450b-aa81-d3f84b772efb", []string{"eca1b104dce16c30705f4147a9c4a373ac88646c5d1bcda6a89c018940cb96a0"}, coboWaas2.TransactionRequestFee{TransactionRequestEvmEip1559Fee: coboWaas2.NewTransactionRequestEvmEip1559Fee("9000000000000", "1000000000000", coboWaas2.FeeType("Fixed"), "ETH")}) configuration := coboWaas2.NewConfiguration() // Initialize the API client apiClient := coboWaas2.NewAPIClient(configuration) ctx := context.Background() // Select the development environment. To use the production environment, replace coboWaas2.DevEnv with coboWaas2.ProdEnv ctx = context.WithValue(ctx, coboWaas2.ContextEnv, coboWaas2.DevEnv) // Replace `` with your private key ctx = context.WithValue(ctx, coboWaas2.ContextPortalSigner, crypto.Ed25519Signer{ Secret: "", }) resp, r, err := apiClient.StakingsAPI.CreateBabylonStakingExpansion(ctx). BabylonCreateStakingExpansion(babylonCreateStakingExpansion). Execute() if err != nil { fmt.Fprintf( os.Stderr, "Error when calling `StakingsAPI.CreateBabylonStakingExpansion``: %v\n", err, ) fmt.Fprintf(os.Stderr, "Full HTTP response: %v\n", r) } // response from `CreateBabylonStakingExpansion`: Stakings fmt.Fprintf(os.Stdout, "Response from `StakingsAPI.CreateBabylonStakingExpansion`: %v\n", resp) } ``` ```javascript JavaScript theme={null} const CoboWaas2 = require("@cobo/cobo-waas2"); // Initialize the API client const apiClient = CoboWaas2.ApiClient.instance; // Select the development environment. To use the production environment, replace `Env.DEV` with `Env.PROD` apiClient.setEnv(CoboWaas2.Env.DEV); // Replace `` with your private key apiClient.setPrivateKey(""); // Call the API const apiInstance = new CoboWaas2.StakingsApi(); const opts = { BabylonCreateStakingExpansion: CoboWaas2.BabylonCreateStakingExpansion.constructFromObject({ staking_id: "3f2840ce-44eb-450b-aa81-d3f84b772efb", finality_provider_public_keys: [ "eca1b104dce16c30705f4147a9c4a373ac88646c5d1bcda6a89c018940cb96a0", ], fee: { fee_type: "EVM_EIP_1559", token_id: "TRON" }, }), }; apiInstance.createBabylonStakingExpansion(opts).then( (data) => { console.log("API called successfully. Returned data: " + data); }, (error) => { console.error(error); }, ); ``` ## OpenAPI ````yaml post /stakings/protocols/babylon/stakings/expansions openapi: 3.0.3 info: title: Cobo Wallet as a Service 2.0 description: > The Cobo Wallet-as-a-Service (WaaS) 2.0 API is the latest version of Cobo's WaaS API offering. It enables you to access Cobo's full suite of crypto wallet technologies with powerful and flexible access controls. By encapsulating complex security protocols and streamlining blockchain interactions, this API allows you to concentrate on your core business activities without worrying about the safety of your assets. The WaaS 2.0 API presents the following key features: - A unified API for Cobo's [all four wallet types](https://manuals.cobo.com/en/portal/introduction#an-all-in-one-wallet-platform) - Support for 80+ chains and 3000+ tokens - A comprehensive selection of webhook events - Flexible usage models for MPC Wallets, including [Organization-Controlled Wallets](https://manuals.cobo.com/en/portal/mpc-wallets/ocw/introduction) and [User-Controlled Wallets](https://manuals.cobo.com/en/portal/mpc-wallets/ucw/introduction) - Programmatic control of smart contract wallets such as Safe{Wallet} with fine-grained access controls - Seamlessly transfer funds across multiple exchanges, including Binance, OKX, Bybit, Deribit, and more For more information about the WaaS 2.0 API, see [Introduction to WaaS 2.0](https://www.cobo.com/developers/v2/guides/overview/introduction). termsOfService: https://cobo.com/waas/tos/ license: name: Apache 2.0 url: https://www.apache.org/licenses/LICENSE-2.0.html contact: name: Cobo WaaS url: https://www.cobo.com/waas email: help@cobo.com version: 1.0.0 servers: - url: https://api.dev.cobo.com/v2 description: Development environment - url: https://api.cobo.com/v2 description: Production environment security: - CoboAuth: [] tags: - name: Organizations description: Operations related to Organizations. - name: Wallets description: Operations related to all wallets. - name: Wallets - MPC Wallets description: Operations related to mpc wallet. - name: Wallets - Exchange Wallet description: Operations related to exchange wallet. - name: Wallets - Smart Contract Wallets description: Operations related to smart contract wallet. - name: Transactions description: Operations related to all transactions. - name: Developers - Webhooks description: Operations related to webhooks. - name: Stakings description: Operations related to staking. - name: OAuth description: Operations related to OAuth. - name: Developers description: Operations related to developers. - name: AddressBooks description: Operations related to address books. - name: TravelRule description: Operations related to travel rule. - name: GraphQL description: Operations related to executing GraphQL queries and mutations. - name: PrimeBroker description: Operations related to prime broker. - name: AppWorkflows description: Operations related to app workflow. - name: FeeStation description: Operations related to fee station. - name: Payment description: Operations related to payment. - name: Batch Payouts description: Operations related to batch payouts. - name: Tokenization description: Operations related to tokenization. - name: AutoSweep description: Operations related to auto sweep. - name: Compliance description: Operations related to compliance. paths: /stakings/protocols/babylon/stakings/expansions: post: tags: - Stakings summary: Expand Babylon BTC staking description: > This operation initiates a Babylon BTC staking expansion request. Before calling this operation, please ensure the following: - The BTC staking position is active. - The finality provider public keys are valid. Each BSN chain can have at most one finality provider public key. The system first checks whether the provided BTC staking position is active. If active, it creates a new BTC staking position for the Phase-3 expansion. The expansion is processed asynchronously and may take some time to complete. For more information, refer to [Babylon's official doc](https://github.com/babylonlabs-io/babylon/tree/main/docs). operationId: create_babylon_staking_expansion requestBody: $ref: '#/components/requestBodies/createBabylonStakingExpansionBody' responses: '201': $ref: '#/components/responses/createBabylonStakingExpansionResponse' 4XX: $ref: '#/components/responses/badRequestError' 5XX: $ref: '#/components/responses/internalServerError' components: requestBodies: createBabylonStakingExpansionBody: description: The request body to expand Babylon BTC staking to Phase-3 content: application/json: schema: $ref: '#/components/schemas/BabylonCreateStakingExpansion' responses: createBabylonStakingExpansionResponse: description: Successfully expanded Babylon BTC staking to Phase-3. content: application/json: schema: $ref: '#/components/schemas/Stakings' badRequestError: description: >- Bad request. Your request contains malformed syntax or invalid parameters. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' internalServerError: description: Internal server error. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' schemas: BabylonCreateStakingExpansion: title: Babylon staking expansion request body type: object description: The staking expansion information specific to the Babylon protocol. required: - finality_provider_public_keys - staking_id - fee properties: staking_id: description: The ID of the Phase-2 BTC staking position. type: string example: 3f2840ce-44eb-450b-aa81-d3f84b772efb finality_provider_public_keys: description: >- The public keys of the finality providers, with each key corresponding to a BSN chain. type: array items: type: string pattern: ^[0-9a-fA-F]{64}$ example: eca1b104dce16c30705f4147a9c4a373ac88646c5d1bcda6a89c018940cb96a0 request_id: type: string example: f47ac10b-58cc-4372-a567-0e02b2c3d479 description: >- The request ID that is used to track a request. The request ID is provided by you and must be unique within your organization. fee: $ref: '#/components/schemas/TransactionRequestFee' Stakings: type: object description: The information about a staking position. required: - id - wallet_id - address - pool_id - token_id - amounts - created_timestamp - updated_timestamp properties: id: description: The ID of the staking position. type: string example: 0011039d-27fb-49ba-b172-6e0aa80e37ec wallet_id: type: string example: 0111039d-27fb-49ba-b172-6e0aa80e37ec description: The staker's wallet ID. address: type: string example: '0xAbCdE123456789aBcDeF123456789aBcDeF12345' description: The staker's wallet address. amounts: $ref: '#/components/schemas/AmountDetails' pool_id: $ref: '#/components/schemas/StakingPoolId' token_id: type: string example: BTC description: The token ID. rewards_info: description: The information about the staking rewards. type: object example: {} created_timestamp: description: The time when the staking position was created. type: integer format: int64 example: 1640995200000 updated_timestamp: description: The time when the staking position was last updated. type: integer format: int64 example: 1640995200000 validator_info: $ref: '#/components/schemas/BabylonValidator' validators: type: array items: $ref: '#/components/schemas/BabylonValidator' extra: oneOf: - $ref: '#/components/schemas/BabylonStakingExtra' - $ref: '#/components/schemas/EthStakingExtra' - $ref: '#/components/schemas/CoreStakingExtra' discriminator: propertyName: pool_type mapping: Babylon: $ref: '#/components/schemas/BabylonStakingExtra' ETHBeacon: $ref: '#/components/schemas/EthStakingExtra' CoreBTC: $ref: '#/components/schemas/CoreStakingExtra' ErrorResponse: type: object description: The response of a failed request. required: - error_code - error_message - error_id properties: error_code: type: integer description: >- The error code. Refer to [Error codes and status codes](https://www.cobo.com/developers/v2/api-references/error-codes) for more details. error_message: type: string description: The error description. error_id: type: string description: >- The error log ID. You can provide the error ID when submitting a ticket to help Cobo to locate the issue. example: 0b6ddf19083c4bd1a9ca01bec44b24dd TransactionRequestFee: oneOf: - $ref: '#/components/schemas/TransactionRequestFixedFee' - $ref: '#/components/schemas/TransactionRequestEvmEip1559Fee' - $ref: '#/components/schemas/TransactionRequestEvmLegacyFee' - $ref: '#/components/schemas/TransactionRequestUtxoFee' - $ref: '#/components/schemas/TransactionRequestSOLFee' - $ref: '#/components/schemas/TransactionRequestFILFee' discriminator: propertyName: fee_type mapping: Fixed: $ref: '#/components/schemas/TransactionRequestFixedFee' EVM_EIP_1559: $ref: '#/components/schemas/TransactionRequestEvmEip1559Fee' EVM_Legacy: $ref: '#/components/schemas/TransactionRequestEvmLegacyFee' UTXO: $ref: '#/components/schemas/TransactionRequestUtxoFee' SOL: $ref: '#/components/schemas/TransactionRequestSOLFee' FIL: $ref: '#/components/schemas/TransactionRequestFILFee' AmountDetails: type: array description: The details about the staking amount. items: type: object required: - status - amount properties: status: $ref: '#/components/schemas/AmountStatus' amount: type: string example: '100.00' description: The staking amount. StakingPoolId: type: string enum: - babylon_btc_signet - babylon_btc - beacon_eth - beacon_eth_holesky - core_btc - core_xtn - sky_farm_eth_usdc - bithive_signet - bithive - beacon_bera - beacon_bera_testnet - berachain_bgt - berachain_bgt_testnet example: babylon_btc_signet description: >- The ID of the staking pool. A staking pool is a pairing of a staking protocol and a specific type of token. Currently, `berachain_bgt` and `berachain_bgt_testnet` are not supported. BabylonValidator: allOf: - $ref: '#/components/schemas/BaseStakeExtra' - type: object description: The information about the Babylon validator. required: - name properties: icon_url: description: The URL of the validator's icon. type: string format: url example: https://example.com/icon.png name: description: The validator's name. type: string example: Cobo priority: description: This property can be ignored. type: integer example: 0 public_key: description: The public key of the validator. type: string example: eca1b104dce16c30705f4147a9c4a373ac88646c5d1bcda6a89c018940cb96a0 commission_rate: description: The commission rate of the validator. type: number format: float example: 0.1 supported_pos_chains: description: A list of supported Proof-of-Stake (PoS) chains. type: array items: type: string enum: - Babylon - Cosmos - Ethereum example: - Babylon - Cosmos - Ethereum BabylonStakingExtra: title: Babylon allOf: - $ref: '#/components/schemas/BaseStakeExtra' - type: object description: The information about the Babylon protocol. required: - pos_chain properties: pos_chain: description: The Proof-of-Stake (PoS) chain. type: string example: Babylon Chain unlock_timestamp: description: >- The estimated time when the bitcoins will be unlocked, in Unix timestamp format, measured in milliseconds. type: integer format: int64 example: 1640995200000 unlock_block_height: description: The block height at which the bitcoins will be unlocked. type: integer format: int64 example: 871234 stake_address: description: The address receiving the staked bitcoins. type: string example: tb1pgmpawe2rkrzuuflu8yw564lerfalhw8td36dha49yz4l99xvm3psteh393 unbond_address: description: The address receiving the unlocked bitcoins. type: string example: tb1pzcn4hmsfq32vyfnckvrtyjhdh0cf2hsm2nr6m8034x4lnrx3ry4q2nyzqv EthStakingExtra: title: Ethereum Beacon Chain allOf: - $ref: '#/components/schemas/BaseStakeExtra' - type: object description: The information about the Ethereum Beacon Chain. required: - pos_chain properties: pos_chain: description: The Proof-of-Stake (PoS) chain. type: string example: Ethereum beacon_validators: description: The list of validator information. type: array items: type: object properties: pubkey: description: The public key of the validator. type: string example: '0x123456789abcdef' status: $ref: '#/components/schemas/AmountStatus' apy: description: The annual percentage yield (APY) of the validator. type: number example: 0.02 staked_amount: description: The staked amount. type: string example: '100.00' rewards_received: description: The rewards received. type: string example: '10.00' updated_timestamp: description: >- The time when the validator's status was last updated, in Unix timestamp format and measured in milliseconds. type: integer format: int64 example: 1640995200000 CoreStakingExtra: title: CORE allOf: - $ref: '#/components/schemas/BaseStakeExtra' - type: object description: The information about staking in the CORE staking protocol. required: - pos_chain - staker_address - validator_address - reward_address - timelock properties: pos_chain: description: The Proof-of-Stake (PoS) chain. type: string example: Ethereum staker_address: description: The staker's Bitcoin address. type: string example: bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh validator_address: description: The validator's EVM address. type: string example: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045' reward_address: description: The EVM address to receive staking rewards. type: string example: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045' timelock: description: >- The Unix timestamp (in seconds) when the staking position will be unlocked and available for withdrawal. type: integer example: 1704067200 TransactionRequestFixedFee: type: object description: > The preset properties to limit transaction fee. In the fixed fee model, the transaction fee is a fixed amount within a certain amount of period regardless of the transaction size or network congestion, which can vary between different chains. For more information about the fixed fee model, refer to [Fee models](https://www.cobo.com/developers/v2/guides/transactions/estimate-fees#fee-models). You can specify the maximum fee amount to limit the transaction fee. The transaction will fail if the transaction fee exceeds the specified maximum fee amount. Switch between the tabs to display the properties for different transaction fee models. title: Fixed required: - fee_type - token_id allOf: - type: object properties: fee_type: $ref: '#/components/schemas/FeeType' token_id: type: string description: The token used to pay the transaction fee. example: TRON - $ref: '#/components/schemas/MaxFeeAmount' TransactionRequestEvmEip1559Fee: type: object description: > The preset properties to limit transaction fee. For more information about the EIP-1559 fee model, refer to [Fee models](https://www.cobo.com/developers/v2/guides/transactions/estimate-fees#fee-models). You can specify the maximum gas fee per gas unit, maximum priority fee per gas unit, and the gas limit to limit the gas price, priority fee per gas unit, gas units used in the transaction. Switch between the tabs to display the properties for different transaction fee models. title: EVM_EIP_1559 required: - fee_type - token_id - max_fee_per_gas - max_priority_fee_per_gas allOf: - type: object properties: fee_type: $ref: '#/components/schemas/FeeType' token_id: type: string description: The token used to pay the transaction fee. example: ETH gas_limit: type: string description: >- The gas limit. It represents the maximum number of gas units that you are willing to pay for the execution of a transaction or Ethereum Virtual Machine (EVM) operation. The gas unit cost of each operation varies. example: '21000' - $ref: '#/components/schemas/EvmEip1559FeeBasePrice' TransactionRequestEvmLegacyFee: type: object description: > The preset properties to limit transaction fee. For more information about the Legacy fee model, refer to [Fee models](https://www.cobo.com/developers/v2/guides/transactions/estimate-fees#fee-models). You can specify the gas limit to limit the gas units used in the transaction. Switch between the tabs to display the properties for different transaction fee models. required: - fee_type - token_id - gas_price title: EVM_Legacy allOf: - type: object properties: fee_type: $ref: '#/components/schemas/FeeType' token_id: type: string description: The token used to pay the transaction fee. example: ETH gas_limit: type: string description: >- The gas limit. It represents the maximum number of gas units that you are willing to pay for the execution of a transaction or Ethereum Virtual Machine (EVM) operation. The gas unit cost of each operation varies. example: '21000' - $ref: '#/components/schemas/EvmLegacyFeeBasePrice' TransactionRequestUtxoFee: type: object description: > The preset properties to limit transaction fee. For more information about the UTXO fee model, see [Fee models](https://www.cobo.com/developers/v2/guides/transactions/estimate-fees#fee-models). You can specify the maximum fee amount to limit the transaction fee. The transaction will fail if the transaction fee exceeds the specified maximum fee amount. Switch between the tabs to display the properties for different transaction fee models. required: - fee_type - token_id title: UTXO allOf: - type: object properties: fee_type: $ref: '#/components/schemas/FeeType' token_id: type: string description: The token used to pay the transaction fee. example: BTC max_fee_amount: type: string description: >- The maximum fee that you are willing to pay for the transaction. Provide the value without applying precision. The transaction will fail if the transaction fee exceeds the maximum fee. example: '0.1' - $ref: '#/components/schemas/UtxoFeeBasePrice' TransactionRequestSOLFee: type: object description: > The preset properties to limit transaction fee. For more information about the SOL fee model, see [Fee models](https://www.cobo.com/developers/v2/guides/transactions/estimate-fees#fee-models). You can specify CU price and CU limit to adjust the priority and resource allocation of your transaction. Switch between the tabs to display the properties for different transaction fee models. title: SOL required: - fee_type - token_id - compute_unit_price - compute_unit_limit allOf: - type: object properties: fee_type: $ref: '#/components/schemas/FeeType' token_id: type: string description: The token used to pay the transaction fee. example: ETH - $ref: '#/components/schemas/SOLComputeUnit' TransactionRequestFILFee: type: object description: > The preset properties to limit transaction fee. For more information about the FIL fee model, see [Fee models](https://www.cobo.com/developers/v2/guides/transactions/estimate-fees#fee-models). You can specify the gas fee cap, gas premium, and gas limit to control fee behavior and prioritization. Switch between the tabs to display the properties for different transaction fee models. title: FIL required: - fee_type - token_id - gas_fee_cap - gas_premium allOf: - type: object properties: fee_type: $ref: '#/components/schemas/FeeType' token_id: type: string description: The token used to pay the transaction fee. example: ETH - $ref: '#/components/schemas/FILPrice' AmountStatus: type: string enum: - StakeInProgress - Active - Rejected - LimitExceeded - Invalid - UnstakeInProgress - Withdrawable - WithdrawInProgress - Closed example: Active description: > The status of the staking amount. Possible values include: - `StakeInProgress`: The staking request is submitted and is waiting to be confirmed by the staking protocol. - `Active`: The amount has been staked. - `Rejected`: The staking request has been rejected because the signer refuses to sign the transaction. - `LimitExceeded`: The total staking cap of the staking protocol has been reached. - `Invalid`: The staking request is invalid. This is often due to the failure to broadcast the transaction. - `UnstakeInProgress`: The unstaking request is submitted and is waiting to be confirmed by the staking protocol. - `Withdrawable`: The tokens have been unstaked and are ready to be withdrawn. - `WithdrawInProgress`: The withdrawal request is submitted and is waiting to be confirmed on the chain network. - `Closed`: The staking position is closed. BaseStakeExtra: type: object description: The base information about a staking protocol. required: - pool_type properties: pool_type: $ref: '#/components/schemas/StakingPoolType' FeeType: type: string enum: - Fixed - EVM_EIP_1559 - EVM_Legacy - UTXO - SOL - FIL example: EVM_EIP_1559 default: EVM_EIP_1559 description: > The fee model. Possible values include: - `Fixed`: The fixed fee model. - `EVM_EIP_1559`: The EIP-1559 fee model. - `EVM_Legacy`: The legacy fee model. - `UTXO`: The fee model used in UTXO-based blockchains, such as Bitcoin. - `SOL`: The fee model used in Solana. - `FIL`: The fee model used in Filecoin. Each fee model requires a different set of properties. Switch between the above tabs for details. To learn more about the fee models, refer to [Fee models](https://www.cobo.com/developers/v2/guides/transactions/estimate-fees#fee-models). MaxFeeAmount: type: object properties: max_fee_amount: type: string description: >- The maximum fee that you are willing to pay for the transaction. Provide the value without applying precision. The transaction will fail if the transaction fee exceeds the maximum fee. example: '0.1' EvmEip1559FeeBasePrice: type: object properties: max_fee_per_gas: type: string description: The maximum gas fee per gas unit used on the chain, in wei. example: '9000000000000' max_priority_fee_per_gas: type: string description: >- The maximum priority fee per gas unit used, in wei. The maximum priority fee represents the highest amount of miner tips that you are willing to pay for your transaction. example: '1000000000000' EvmLegacyFeeBasePrice: type: object properties: gas_price: type: string description: >- The gas price, in wei. The gas price represents the amount of ETH that must be paid to validators for processing transactions per gas unit used. example: '100000000' UtxoFeeBasePrice: type: object properties: fee_rate: type: string description: >- The fee rate in sat/vByte. The fee rate represents the satoshis you are willing to pay for each byte of data that your transaction will consume on the blockchain. example: '50' SOLComputeUnit: type: object properties: compute_unit_price: type: string description: >- The price paid per compute unit. This value determines the priority fee for the transaction, allowing you to increase inclusion probability in congested conditions. example: '0.0001' compute_unit_limit: type: string description: >- The maximum number of compute units your transaction is allowed to consume. It sets an upper bound on computational resource usage to prevent overload. example: '200000' FILPrice: type: object properties: gas_premium: type: string description: >- An optional tip you can include to prioritize your transaction. The gas premium incentivizes miners to include your transaction sooner than those offering only the base fee. example: '0.0001' gas_fee_cap: type: string description: The maximum gas price you are willing to pay per unit of gas. example: '0.00035' gas_limit: type: string description: The maximum amount of gas your transaction is allowed to consume. example: '500' StakingPoolType: type: string enum: - Babylon - ETHBeacon - CoreBTC - SkyFarm - BitHive - BERABeacon - BeraChainBGT example: Babylon description: | The type of the staking pool. Possible values are: - `Babylon`: Babylon staking pool - `ETHBeacon`: Ethereum Beacon Chain staking pool - `CoreBTC`: Core BTC staking pool - `SkyFarm`: SKY farm staking pool - `BitHive`: BitHive staking pool - `BERABeacon`: BERA Beacon Chain staking pool - `BeraChainBGT`: Bera Chain BGT staking pool securitySchemes: CoboAuth: type: apiKey in: header name: BIZ-API-KEY description: > The API key. For more details, refer to [API key](https://www.cobo.com/developers/v2/guides/overview/cobo-auth#api-key). In the API playground, enter your [API secret](https://www.cobo.com/developers/v2/guides/overview/cobo-auth#api-secret), and your API key will be accordingly calculated. ````