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POST
/
v1
/
query
/
get-vault-upgrade-payload-passkey
Get vault upgrade payload (Base -> Ethereum)
curl --request POST \
  --url https://api.example.com/v1/query/get-vault-upgrade-payload-passkey \
  --header 'Content-Type: application/json' \
  --header 'X-Pubkey: <x-pubkey>' \
  --header 'X-Pubkey, X-Timestamp, X-Signature: <api-key>' \
  --header 'X-Signature: <x-signature>' \
  --header 'X-Timestamp: <x-timestamp>' \
  --data '
{
  "accountId": "550e8400-e29b-41d4-a716-446655440000",
  "sourceVaultAddr": "0x061b3aff8e21a9d194ce43cEfc20A0eFf122Ec69"
}
'
{
  "bodyToSign": {
    "type": "ACTIVITY_TYPE_SIGN_RAW_PAYLOADS",
    "timestampMs": "<string>",
    "organizationId": "<string>",
    "parameters": {
      "signWith": "<string>",
      "payloads": [
        "<string>"
      ],
      "encoding": "PAYLOAD_ENCODING_HEXADECIMAL",
      "hashFunction": "HASH_FUNCTION_NO_OP"
    }
  },
  "transactionId": "550e8400-e29b-41d4-a716-446655440000",
  "sourceAmount": "123.456789",
  "destinationAmount": "123.456789",
  "destinationVaultAddr": "0x2F99e35Ea811F3cC230B26dfF817604B5D4B6e38"
}

Authorizations

​
X-Pubkey, X-Timestamp, X-Signature
string
header
required

Headers

​
X-Pubkey
string
required

Integrator's ECDSA public key (P-256 curve, compressed SEC1 format). Example: 0x038fedef7c12f93bbf342ad8943b7a825a3b41f61c9dc118b2c718efebabbf62fd

​
X-Timestamp
string
required

Unix timestamp in seconds (UTC). Must be within tolerance window (1 minute) to prevent replay attacks. Example: 1760375826

​
X-Signature
string
required

ECDSA signature (DER-encoded, hex with 0x prefix). Signs the message: {timestamp}{METHOD}{path_and_query}{json_body}. Example: 0x3045022100...

Body

application/json

Request body containing the account ID and source vault address (on Base).

Request body for initiating a vault upgrade (Base -> Ethereum)

​
accountId
string<uuid>
required

A UUID string

Example:

"550e8400-e29b-41d4-a716-446655440000"

​
sourceVaultAddr
string
required

The address of the source vault on Base (8453)

Example:

"0x061b3aff8e21a9d194ce43cEfc20A0eFf122Ec69"

Response

Payloads to sign created successfully

Response containing the two raw payloads to sign (withdraw from Base and deposit on Ethereum) in one passkey prompt.

​
bodyToSign
object
required

The object that needs to be signed by the end user to make a batch of transactions.

​
transactionId
string<uuid>
required

A UUID string

Example:

"550e8400-e29b-41d4-a716-446655440000"

​
sourceAmount
string
required

A high-precision decimal number represented as a string

Example:

"123.456789"

​
destinationAmount
string
required

A high-precision decimal number represented as a string

Example:

"123.456789"

​
destinationVaultAddr
string
required

The destination vault address on Ethereum.

Example:

"0x2F99e35Ea811F3cC230B26dfF817604B5D4B6e38"