Yearn Finance V2

Supported Chains

Available on Ethereum, Arbitrum, Base and Optimism

Available Endpoints:

Click on the endpoint to jump to the section with full details

• /getbalanceGET -Get balance of the user in a given Vault.

• /getvaultsGET - Get the number of the vaults along with the respective vault APY.

• /depositvault GET - Trigger the deposit transaction for the given vault.

• /withdrawvault POST - Trigger the withdraw transaction for the given vault.

Yield Aggregator IDs

Many endpoints have a parameter where you can provide a lendborrow ID.

Below is a list of lendborrow IDs related to Yearn Finance V2. Please see the Yield Aggregator ID for a complete Yield Aggregator ID list and more information.

Yield Aggregator Name	Chain	Yield Aggregator ID
Yearn Finance V2	Ethereum	5000
Yearn Finance V2	Arbitrum	5001
Yearn Finance V2	Base	5002
Yearn Finance V2	Optimism	5003

Endpoint Details

/getbalance

For /getbalance, the user can either pass the vaultAddress or the tokenAddress and the vaultNumber along with the required parameters.

Get balance of the user in a given Vault.

GET https://api.expand.network/yieldaggregator/getbalance

Query Parameters

Name	Type	Description
rpc	String	Remote procedural call URL.
address*	String	Public Address of the owner.
tokenAddress	String	The address of token.
vaultNumber	String	The number of the vault, incase there are multiple vaults.
yieldAggregatorId*	String	Refer to the Yield Aggregator ID page for details.
vaultAddress	String	The address of the vault.

Sample Request

With tokenAddress:

https://api.expand.network/yieldaggregator/getbalance?address=0xC7565379C190014449eE83CF9FD7475206E59f9e&tokenAddress=0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2&yieldAggregatorId=5000

With VaultAddress:

https://api.expand.network/yieldaggregator/getbalance?address=0x6Fb447Ae94F5180254D436A693907a1f57696900&yieldAggregatorId=5000&vaultAddress=0xa9fE4601811213c340e850ea305481afF02f5b28

Sample Response

/getvaults

Get the number of the vaults along with the respective vault APY.

GET https://api.expand.network/yieldaggregator/getvaults

Query Parameters

Name	Type	Description
rpc	String	Remote procedural call URL
yieldAggregatorId*	String	Refer to the Yield Aggregator ID page for details.
tokenAddress	String	The address of token.

Sample Request

https://api.expand.network/yieldaggregator/getvaults?tokenAddress=0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2&yieldAggregatorId=5000

Sample Response

/depositvault

For /depositvault, the user can either pass the tokenAddress or the vaultAddress along with the required parameters.

Trigger the deposit transaction for the given vault.

POST https://api.expand.network/yieldaggregator/depositvault

Request Body

Name	Type	Description
amount*	String	The amount of token to deposit.
tokenAddress	String	The address of the token.
from*	String	Address of the sender of the token.
gas	String	Maximum gas limit provided by the sender, for the transaction.
vaultNumber	String	The number of the vault, in case there are multiple vaults.
vaultAddress	String	The address of the vault.
yieldAggregatorId*	String	Refer to the Yield Aggregator ID page for details.
gasPriority	String	low, medium, or high.

Sample Request

With tokenAddress:

{
    "from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
    "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
    "amount": "500000",
    "vaultNumber": "1",
    "yieldAggregatorId": "5000",
    "gas": "2307200" 
}

With VaultAddress:

{
    "from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
    "vaultAddress":"0xa258C4606Ca8206D8aA700cE2143D7db854D168c",
    "amount": "500000",
    "yieldAggregatorId": "5000",
    "gas": "2307200"
}

Sample Response

Sample Request

With gasPriority (medium)-

1. With tokenAddress:

{
    "from": "0xfAE7D9854995E28BEB1B1da864ee2A1E2EC17f07",
    "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
    "amount": "10000000000",
    "vaultNumber": "1",
    "yieldAggregatorId": "5000",
    "gas": "2307200",
    "gasPriority":"medium"
}

2. With VaultAddress:

{
    "from": "0xfAE7D9854995E28BEB1B1da864ee2A1E2EC17f07",
    "vaultAddress":"0xa258C4606Ca8206D8aA700cE2143D7db854D168c",
    "amount": "500000",
    "yieldAggregatorId": "5000",
    "gas": "2307200",
    "gasPriority":"medium"
}

Sample Response

/withdrawvault

For /withdrawvault, the user can either pass the tokenAddress or the vaultAddress along with the required parameters.

Trigger the withdraw transaction for the given vault.

POST https://api.expand.network/yieldaggregator/withdrawvault

Request Body

Name	Type	Description
amount*	String	Amount to be withdrawn.
from*	String	Address of the withdrawer of the token.
gas	String	Maximum gas limit provided by the sender, for the transaction.
tokenAddress	String	Address of the token.
vaultNumber	String	The number of the vault, in case there are multiple vaults.
vaultAddress	String	Address of the vault.
yieldAggregatorId*	String	Refer to the Yield Aggregator ID page for details.
gasPriority	String	low, medium, or high.

Sample Request

With tokenAddress:

{
    "from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
    "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
    "amount": "4881310",
    "gas": "2307200",
    "vaultNumber": "1",
    "yieldAggregatorId": "5000"
}

With vaultAddress:

{
    "from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
    "vaultAddress": "0xa258C4606Ca8206D8aA700cE2143D7db854D168c",
    "amount": "4881310",
    "gas": "2307200",
    "yieldAggregatorId": "5000" 
}

Sample Response

Sample Request

With gasPriority (high)-

1. With tokenAddress:

{
    "from": "0xfAE7D9854995E28BEB1B1da864ee2A1E2EC17f07",
    "tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
    "amount": "10000000",
    "gas": "2307200",
    "gasPriority":"high",
    "vaultNumber": "1",
    "yieldAggregatorId": "5000"
}

2. With VaultAddress:

{
    "from": "0xfAE7D9854995E28BEB1B1da864ee2A1E2EC17f07",
    "vaultAddress": "0xa258C4606Ca8206D8aA700cE2143D7db854D168c",
    "amount": "4881310",
    "gas": "2307200",
    "gasPriority":"high",
    "yieldAggregatorId": "5000"
}

Sample Response