Proof

Get a proof for a transaction in a block.

GEThttps://algo.nownodes.io/v2/blocks/{round}/transactions/{txid}/proof

Path parameters

round*integer

The round in which the transaction appears.

txid*string

The transaction ID for which to generate a proof.

Pattern: [A-Z0-9]+

Query parameters

Response

200400401404500default

Proof of transaction in a block.

Body

application/json

hashtype*enum

The type of hash function used to create the proof, must be one of:

• sha512_256
• sha256

sha512_256sha256

idx*integer

Index of the transaction in the block's payset.

proof*string (byte)

Proof of transaction membership.

Pattern: ^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$

stibhash*string (byte)

Hash of SignedTxnInBlock for verifying proof.

Pattern: ^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$

treedepth*integer

Represents the depth of the tree that is being proven, i.e. the number of edges from a leaf to the root.

Request

JavaScriptCurlPython

const response = await fetch('https://algo.nownodes.io/v2/blocks/{round}/transactions/{txid}/proof', {
    method: 'GET',
    headers: {},
});
const data = await response.json();

Response

200400401404500

{
  "hashtype": "sha512_256",
  "idx": 0,
  "proof": "Ynl0ZXM=",
  "stibhash": "Ynl0ZXM=",
  "treedepth": 0
}