Mass

Calculate Transaction Mass

This function calculates and returns the mass of a transaction, which is essential for determining the minimum fee. The mass calculation takes into account the storage mass as defined in KIP-0009.

Note: Be aware that if the transaction has a very low output amount or a high number of outputs, the mass can become significantly large.

post

/transactions/mass

Body

versionVersionrequired

lockTimeLocktime

subnetworkIdSubnetworkid

inputsInputsrequired

outputsOutputsrequired

Responses

application/json

application/json

cURL

JavaScript

Python

HTTP

cURL

curl -L \
  --request POST \
  --url 'https://kas.nownodes.io/transactions/mass' \
  --header 'Content-Type: application/json' \
  --data '{"version":1,"lockTime":0,"inputs":[{"previousOutpoint":{"transactionId":"text","index":1},"signatureScript":"text","sequence":1,"sigOpCount":1}],"outputs":[{"amount":1,"scriptPublicKey":{"version":1,"scriptPublicKey":"text"}}]}'

200

422

200

{
  "mass": 1,
  "storage_mass": 1,
  "compute_mass": 1
}

Successful Response