POST 
/timestamp/v4/jsonrpc

The JSON-RPC API provides methods assisting the construction of blockchain transactions for Timestamp operations, and interaction with the ledger.

Request

application/json

Body

required

The body follows the JSON-RPC 2.0 specification.

It requires the following fields:

• jsonrpc: must be exactly "2.0"
• method: method to be invoked
• params: method parameters
• id: identifier established by the client

API Methods

insertHashAlgorithm

Call to build an unsigned transaction to insert a new hash algorithm.

Parameters:

• from: Ethereum address of the administrator
• outputLength: hash output length (in bits)
• ianaName: IANA name of the hash algorithm
• oid: object identifier (OID)
• status: status of the algorithm (1 = active, 2 = revoked)
• multihash: multihash name

updateHashAlgorithm

Call to build an unsigned transaction to update a hash algorithm.

Parameters:

• from: Ethereum address of the administrator
• outputLength: hash output length (in bits)
• ianaName: IANA name of the hash algorithm
• oid: object identifier (OID)
• status: status of the algorithm (1 = active, 2 = revoked)
• multihash: multihash name

timestampHashes

Call to build an unsigned transaction to timestamp hashes. It's possible to insert up to 3 hashes in a single transaction.

Parameters:

• from: Ethereum address of user
• hashAlgorithmIds: Array of hash algorithms ids used (up to 3)
• hashValues: Array of hashes (up to 3)
• timestampData (optional): Timestamp data. This field must be a JSON stringified and converted into hex string

timestampRecordHashes

Call to build an unsigned transaction to timestamp data and create a record of it with some info. It's possible to insert up to 3 hashes in a single transaction.

Parameters:

• from: Ethereum address of user
• hashAlgorithmIds: Array of hash algorithms ids used (up to 3)
• hashValues: Array of hashes (up to 3)
• timestampData (optional): Timestamp data. This field must be a JSON stringified and converted into hex string

timestampVersionHashes

Call to build an unsigned transaction to timestamp hashes and store them under the given record. It's possible to insert up to 3 hashes in a single transaction. This method can be called only by record owners.

Parameters:

• from: Ethereum address of user
• versionHash: Version hash to update
• hashAlgorithmIds: Array of hash algorithms ids used (up to 3)
• hashValues: Array of hashes (up to 3)
• timestampData (optional): Timestamp data. This field must be a JSON stringified and converted into hex string
• versionInfo (optional): Version info. This field must be a JSON stringified and converted into hex string

insertRecordOwner

Call to build an unsigned transaction to insert a record owner. This method can be called only by record owners.

Parameters:

• from: Ethereum address of user
• recordId: Record ID to update
• ownerId: Ethereum address of new owner
• notBefore: Point in time when the owner becomes valid. It should be defined in epoch time.
• notAfter: Point in time when the owner becomes invalid. It should be defined in epoch time. For indefinite time set 0.

revokeRecordOwner

Call to build an unsigned transaction to revoke a record owner. This method can be called only by record owners.

Parameters:

• from: Ethereum address of user
• recordId: Record ID to update
• ownerId: Ethereum address of the owner to revoke

timestampRecordVersionHashes

Call to build an unsigned transaction to timestamp data and link it to a new version of an existing record. It's possible to insert up to 3 hashes in a single transaction. This method can be called only by record owners.

Parameters:

• from: Ethereum address of user
• recordId: Record ID to update
• hashAlgorithmIds: Array of hash algorithms ids used (up to 3)
• hashValues: Array of hashes (up to 3)
• timestampData (optional): Timestamp data. This field must be a JSON stringified and converted into hex string
• versionInfo (optional): Version info. This field must be a JSON stringified and converted into hex string

appendRecordVersionHashes

Call to build an unsigned transaction to timestamp data and link it to an existing version of a record. It's possible to insert up to 3 hashes in a single transaction. This method can be called only by record owners.

Parameters:

• from: Ethereum address of user
• recordId: Record ID to update
• versionId: Version ID to update
• hashAlgorithmIds: Array of hash algorithms ids used (up to 3)
• hashValues: Array of hashes (up to 3)
• timestampData (optional): Timestamp data. This field must be a JSON stringified and converted into hex string
• versionInfo (optional): Version info. This field must be a JSON stringified and converted into hex string

detachRecordVersionHash

Call to build an unsigned transaction to detach a hash from the timestamps ids of a version of an existing record. This method can be called only by record owners.

Parameters:

• from: Ethereum address of user
• recordId: Record ID to update
• versionId: Version ID to update
• versionHash: Version hash to update
• hashValue: Hash value to detach

insertRecordVersionInfo

Call to build an unsigned transaction to to insert new info to a version of an existing record. This method can be called only by record owners.

Parameters:

• from: Ethereum address of user
• recordId: Record ID to update
• versionId: Version ID to update
• versionInfo (optional): Version info. This field must be a JSON stringified and converted into hex string

sendSignedTransaction

Call to send a signed transaction to the blockchain.

jsonrpc stringrequired

Must be exactly "2.0"

method stringrequired

Method that needs to be invoked

params object[]required

Array of parameters

id integerrequired

Identifier established by the client

Responses

200

Response

application/json

Schema

Schema

jsonrpc string

Must be exactly "2.0"

id integer

Same identifier established by the client in the call

result object
Result of the call
oneOf
MOD2
string

Example (from schema)

{
  "jsonrpc": "string",
  "id": 0,
  "result": {}
}

Build tx

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "from": "0x416e6e6162656c2e4c65652e452d412d506f652e",
    "to": "0xFde86148db58f57787C06BeAf63a9c3f789357b3",
    "data": "0x0000...",
    "nonce": "0x00",
    "chainId": "0x1b3b",
    "gasLimit": "0x10000",
    "gasPrice": "0x00",
    "value": "0x00"
  }
}

Send Transaction

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

400

Bad request

application/problem+json

Schema

Schema

type uri

Default value: about:blank

An absolute URI that identifies the problem type. When dereferenced, it SHOULD provide human-readable documentation for the problem type.

title string

A short summary of the problem type.

status int32

Possible values: >= 400 and <= 600

The HTTP status code generated by the origin server for this occurrence of the problem.

detail string

A human readable explanation specific to this occurrence of the problem.

instance uri

An absolute URI that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced.

Example (from schema)

{
  "type": "about:blank",
  "title": "Internal Server Error",
  "status": 500,
  "detail": "Connection timeout",
  "instance": "string"
}

Bad Request

{
  "title": "Bad Request",
  "status": 400,
  "detail": "Bad request"
}

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