submitpackage | Alchemy Docs

1 import requests 2 3 url = "https://bitcoin-mainnet.alchemy-blast.com/v2/:apiKey" 4 5 payload = { "0": ["0200000000010153fc6712e0c6cbfd15e56743f2a16bba3c0b17837d4fd33d68d2d930739e2b130000000000ffffffff01c0c62d0000000000160014c24b61118d4a2b36257b65e1ea7f15f85e41ff0402483045022100ac32e935715a57ec1d642a5e178c37f74c013bf8e4edc4cb1c79f5352f136e87022020b0b3192347d1b84e9b89d00a2ecb290f18f9c39e514fa3ef2b7a889e7b6c1b012103ab0b56c7aa6254a80c124e04d2149f7fc376afedfe4623f3c59b87c279eaeb1400000000"] } 6 headers = {"Content-Type": "application/json"} 7 8 response = requests.post(url, json=payload, headers=headers) 9 10 print(response.json())

1 { 2 "jsonrpc": "2.0", 3 "id": "1", 4 "result": { 5 "package_msg": "transaction failed", 6 "tx-results": { 7 "6dbccbd4775598af6e9713cd84e90e80431ecc7e932c4b832ab3966ad988bc08": { 8 "txid": "c67ecf450828d639a8cf3d74f168fe6bd9a1121a1167a1d46908d703f871c3a6", 9 "error": "bad-txns-inputs-missingorspent" 10 } 11 }, 12 "replaced-transactions": [] 13 } 14 }

Submits a package containing multiple raw transactions to the mempool for validation and acceptance.

⚠ This endpoint is only available with Blast access.

Path parameters

apiKeystringRequired

Request

This endpoint expects an object.

packagelist of stringsRequired

An array of raw transactions (serialized hex strings) to be submitted as a package.

Response

Transaction results keyed by wtxid.

package_msgstring or null

Status message for the package (e.g., “transaction failed”)

tx-resultsmap from strings to objects or null

replaced-transactionslist of strings or null

List of replaced txids (if any)