Derived Keys Transaction API

Description of endpoints used to construct Derived Key Transactions on the DeSo blockchain

Authorize Derived Key

POST /api/v0/authorize-derived-key

Create an authorize derived key transaction. Transaction needs to be signed and submitted through api/v0/submit-transaction before changes come into effect.

Authorize derived key transactions allows another public key to submit transaction on behalf of the owner public key.

Endpoint implementation in backend.

Request Body

Name
Type
Description

OwnerPublicKeyBase58Check*

String

Public key of the derived key owner

DerivedPublicKeyBase58Check*

String

The derived public key

ExpirationBlock*

uint64

Height of block after which this derived key will no longer work.

AccessSignature*

String

The signature of hash(derived key + expiration block) made by the owner.

DeleteKey*

Boolean

The intended operation on the derived key. If true, this derived key will no longer be valid.

MinFeeRateNanosPerKB*

uint64

Rate per KB

TransactionFees

TransactionFee[]

Array of

objects that define additional outputs that need to be added to this transaction

TransactionSpendingLimitHex*

String

Hex string representing a TransactionSpendingLimit struct that will be merged with the TransactionSpendingLimitTracker for this derived key. We require this be sent as a hex in order toguarantee that the AccessHash computed from this value is consistent with what the user is requesting.

Memo

String

Memo to describe the purpose of this derived key

AppName

String

App requested this derived key. This is used if a memo is not provided so a user can remember which app has access with this derived key.

ExtraData

map[string]string

extra data, values must be strings. This is an arbitrary json object that can be used to add extra metadata on a derived key

DerivedKeySignature

Boolean

Set to true if you intend to sign this transaction with the derived public key instead of the owner public key. This will add the DerivedPublicKey to ExtraData

{
  "TotalInputNanos": 49999779,
  "ChangeAmountNanos": 49999558,
  "FeeNanos": 221,
  "Transaction": {
    "TxInputs": [
      {
        "TxID": [...],
        "Index": 0
      }
    ],
    "TxOutputs": [
      {
        "PublicKey": "Aqo9yNKZ6h5JFN5mSU7T4W7amg1lcZ1SPBqaA8v59gxF",
        "AmountNanos": 49999558
      }
    ],
    "TxnMeta": {
      "DerivedPublicKey": [1,2,3, ...], // Bytes of the Derived public key 
      "ExpirationBlock": 91273 // Block height at which this derived key expires
      "AccessSignature": [23, 34, 45, ...], // Bytes access signature. This is the signed hash of (derivedPublicKey + expirationBlock) made with the ownerPublicKey. Signature is in DER format.
      "OperationType": 1, // 1 means this transaction makes the derived public key valid. 0 means this transaction makes the derived public key invalid.
    },
    "PublicKey": "Aqo9yNKZ6h5JFN5mSU7T4W7amg1lcZ1SPBqaA8v59gxF",
    "ExtraData": { Any additional keys in the ExtraData field of the request body will be included here as well.
      "DerivedKeyMemo": "Nzg3ODc5Nzk3YTdh", // bytes of the memo for this derived key
      "TransactionSpendingLimit": "gNDbw/QCAgIKFgEAAAA=", // bytes of the transaction spending limits for this derived key
    },
    "Signature": null,
    "TxnTypeJSON": 22
  },
  "TransactionHex": "0161b49620c72975d8397836c6b28981a0257d846e28ee74b296264bf1e2109036000102aa3dc8d299ea1e4914de66494ed3e16eda9a0d65719d523c1a9a03cbf9f60c45c6ddeb17152167f80ea6908b93cca921a2a49ef268ad373756b5ba45aff4e06bf7a31f7f20c0012102aa3dc8d299ea1e4914de66494ed3e16eda9a0d65719d523c1a9a03cbf9f60c450000"
}
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