Build info for new transaction

The endpoint provides all the required info to build and sign a new transaction.
This allows to create new transactions without connection to a blockchain node.

Request

Body Params application/json

Request params for the endpoint `/tx/build_info`.

context

object (BuildInfoContext)

required

information about the transaction to be created.

tx_origin

string

Tx Origin

required

Blockchain address that will sign the transaction.

>= 47 characters<= 49 characters

Match pattern:

^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{47,49}$

Example

Responses

🟢200OK

application/json

Successful Response

Body

Response schema for the endpoint `/tx/build_info`.

metadata

object (ResponseMetadata)

required

Metadata for the generated response.

request_context

object (ResponseBlockId)

required

For the endpoints with historical data: the last block, the data from which is included in the response. For the endpoints with blockchain state data: the block whose state is provided in the response. Request context remains the same for all data pages in the series for the initial request.

blockchain_head

object (ResponseBlockId)

required

The latest blockchain block currently available.

data

object (TxBuildInfo)

required

Information to build a new blockchain transaction

tx_origin

string

Tx Origin

required

Blockchain address.

>= 47 characters<= 49 characters

Match pattern:

^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{47,49}$

tx_origin_next_tx_index

integer

Tx Origin Next Tx Index

required

Nonce (ordinal number) of the next transaction to be created by the blockchain address. This value doesn't take into account submitted to the network but not finalised transaction.

>= 0<= 4294967295

tx_origin_free_native_token_balance

integer

Tx Origin Free Native Token Balance

required

Balance of TRAIT token.

>= 0<= 3.402823669209385e+38

chain_genesis_block_hash

string

Chain Genesis Block Hash

required

Block hash.

>= 66 characters<= 66 characters

Match pattern:

^0x[0-9abcdefABCDEF]{64}$

chain_name

string

Chain Name

required

Name of the blockchain.

>= 1 characters<= 50 characters

chain_ss58_format

integer

Chain Ss58 Format

required

Identifier of the address type used to encode the blockchain address in SS58 format.

>= 0<= 16383

block_hash

string

Block Hash

required

Hash of the latest finalised block.

>= 66 characters<= 66 characters

Match pattern:

^0x[0-9abcdefABCDEF]{64}$

block_index

integer

Block Index

required

Index of the latest finalised block.

>= 0<= 4294967295

block_timestamp

integer

Block Timestamp

required

Timestamp of the latest finalised block.

>= 0<= 18446744073709552000

runtime_spec_name

string

Runtime Spec Name

required

The identifier for the current Substrate runtime.

>= 1 characters<= 50 characters

runtime_spec_version

integer

Runtime Spec Version

required

The version of the runtime specification.

>= 0<= 4294967295

runtime_transaction_version

integer

Runtime Transaction Version

required

The version of the interface for handling transactions.

>= 0<= 4294967295

runtime_metadata_raw

string

Runtime Metadata Raw

required

HEX-encoded runtime metadata.

>= 18 characters

Match pattern:

^0x[0-9abcdefABCDEF]{16,}$

Example

{
  "metadata": {
    "request_context": {
      "block_hash": "0xab8006019066f080402ab43da043127b930ef0ffb3349a333222d67c0f542338",
      "block_index": 29702,
      "block_timestamp": 1727581488000
    },
    "blockchain_head": {
      "block_hash": "0xab8006019066f080402ab43da043127b930ef0ffb3349a333222d67c0f542338",
      "block_index": 29702,
      "block_timestamp": 1727581488000
    }
  },
  "data": {
    "tx_origin": "ttrENnXUfsdTDFwweKjK1dSvCXcAtVVQ9xgARy8iBisAFfc5e",
    "tx_origin_next_tx_index": 1,
    "tx_origin_free_native_token_balance": 1000000000000000000,
    "chain_genesis_block_hash": "0x806dec5d0216895474ef81e2c61dd0cd3e8bc2a7eabb1eb76cdf8e18ad2b49be",
    "chain_name": "Trait Asset Hub",
    "chain_ss58_format": 5335,
    "block_hash": "0xab8006019066f080402ab43da043127b930ef0ffb3349a333222d67c0f542338",
    "block_index": 29702,
    "block_timestamp": 1727581488000,
    "runtime_spec_name": "trait-asset-hub-runtime",
    "runtime_spec_version": 1000,
    "runtime_transaction_version": 1,
    "runtime_metadata_raw": "0x6d6574610e6d0800"
  }
}

🟠422Parameter Error

Request

Request samples

Responses