{
  "method": "GET",
  "path": "/transactions/by_hash/{txn_hash}",
  "operationId": "get_transaction_by_hash",
  "summary": "Get transaction by hash",
  "description": "Look up a transaction by its hash. This is the same hash that is returned\nby the API when submitting a transaction (see PendingTransaction).\n\nWhen given a transaction hash, the server first looks for the transaction\nin storage (on-chain, committed). If no on-chain transaction is found, it\nlooks the transaction up by hash in the mempool (pending, not yet committed).\n\nTo create a transaction hash by yourself, do the following:\n1. Hash message bytes: \"RawTransaction\" bytes + BCS bytes of [Transaction](https://aptos-labs.github.io/aptos-core/aptos_types/transaction/enum.Transaction.html).\n2. Apply hash algorithm `SHA3-256` to the hash message bytes.\n3. Hex-encode the hash bytes with `0x` prefix.",
  "tags": [
    "Transactions"
  ],
  "parameters": [
    {
      "name": "txn_hash",
      "in": "path",
      "required": true,
      "description": "Hash of transaction to retrieve",
      "schema": {
        "$ref": "#/components/schemas/HashValue"
      }
    }
  ],
  "requestBody": null,
  "responses": {
    "200": {
      "contentType": "application/json",
      "schema": {
        "$ref": "#/components/schemas/Transaction"
      },
      "example": {}
    },
    "400": {
      "contentType": "application/json",
      "schema": {
        "$ref": "#/components/schemas/AptosError"
      },
      "example": {}
    },
    "403": {
      "contentType": "application/json",
      "schema": {
        "$ref": "#/components/schemas/AptosError"
      },
      "example": {}
    },
    "404": {
      "contentType": "application/json",
      "schema": {
        "$ref": "#/components/schemas/AptosError"
      },
      "example": {}
    },
    "410": {
      "contentType": "application/json",
      "schema": {
        "$ref": "#/components/schemas/AptosError"
      },
      "example": {}
    },
    "500": {
      "contentType": "application/json",
      "schema": {
        "$ref": "#/components/schemas/AptosError"
      },
      "example": {}
    },
    "503": {
      "contentType": "application/json",
      "schema": {
        "$ref": "#/components/schemas/AptosError"
      },
      "example": {}
    }
  }
}