Compound Transaction

Returns a transaction for depositing additional ETH to an active 0x02 validator. Deposit amount must be at least 1 ETH.

How to sign the compound tx

If funding_address is not provided, the API uses the validator's withdrawal address as the funding address by default. The transaction must be signed using the withdrawal address.

If funding_address is provided and it's a different address from withdrawal address, the transaction must be signed using the specified funding address.

signature and withdrawal_credentials are "all zeros"

When parsing the call data of the serialized transaction, you will notice that both signature and withdrawal_credentials are all-zeros. This is normal and expected for compound transactions. Here’s an example for reference

API Data Structure

network

• Type: string
• Allowed Values: mainnet, hoodi
• Required: Yes

amount

• Type: string
• Required: Yes
• Description: Amount to deposit in ETH

pubkey

• Type: string
• Required: Yes

funding_address

• Type: string
• Description: Address funding the transaction. Defaults to withdrawal address.

Responses

201 Created Deposit

{
  "data": {
    "network": "string",
    "signing_payload": "string",
    "unsigned_transaction_serialized": "string",
    "contract_call_data": "string"
  }
}

400 Bad Request

422 Unprocessable Content

Example cURL Request

curl --request POST \
     --url https://api.figment.io/ethereum/compound \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --header 'x-api-key: your-api-key-here' \
     --data '{
  "network": "mainnet"
}'

Example JSON Response

{
  "data": {
    "network": "string",
    "signing_payload": "string",
    "unsigned_transaction_serialized": "string",
    "contract_call_data": "string"
  }
}