{
  assetId: "assetId",
  operation: TransactionOperation.RAW,
  source: {
    type: PeerType.VAULT_ACCOUNT,
    id: "vaultAccountId",
  },
  note: ``,
  extraParameters: {
    rawMessageData: {
      algorithm: "MPC_ECDSA_SECP256K1"/"MPC_ECDSA_SECP256R1"/"MPC_EDDSA_ED25519", // Optional
      messages: [
       	{
          content: "<your_content_to_sign>", // Required
          bip44AddressIndex: 0, // Optional
          bip44change: 0, // Optional
          derivationPath: [44, 0, 0, 0, 0] // Optional
        }
      ]
    },
  },
}

const transactionPayload: TransactionRequest = {
  assetId: "BTC",
  operation: TransactionOperation.RAW,
  source: {
    type: PeerType.VAULT_ACCOUNT,
    id: "0",
  },
  note: ``,
  extraParameters: {
    rawMessageData: {},
  },
};

let txInfo: any;

const getTxStatus = async (txId: string): Promise<TransactionResponse> => {
  try {
    let response: FireblocksResponse<TransactionResponse> =
      await fireblocks.transactions.getTransaction({ txId });
    let tx: TransactionResponse = response.data;
    let messageToConsole: string = `Transaction ${tx.id} is currently at status - ${tx.status}`;

    console.log(messageToConsole);
    while (tx.status !== TransactionStateEnum.Completed) {
      await new Promise((resolve) => setTimeout(resolve, 3000));

      response = await fireblocks.transactions.getTransaction({ txId });
      tx = response.data;

      switch (tx.status) {
        case TransactionStateEnum.Blocked:
        case TransactionStateEnum.Cancelled:
        case TransactionStateEnum.Failed:
        case TransactionStateEnum.Rejected:
          throw new Error(
            `Signing request failed/blocked/cancelled: Transaction: ${tx.id} status is ${tx.status}`,
          );
        default:
          console.log(messageToConsole);
          break;
      }
    }
    while (tx.status !== TransactionStateEnum.Completed);
    return tx;
  } catch (error) {
    throw error;
  }
};

const rawSign = async (
  message: string,
): Promise<CreateTransactionResponse | undefined> => {
  const wrappedMessage =
    "\x18Bitcoin Signed Message:\n" +
    String.fromCharCode(message.length) +
    message;
  const hash = createHash("sha256").update(wrappedMessage, "utf8").digest();
  const content = createHash("sha256").update(hash).digest("hex");
  //@ts-ignore
  transactionPayload.extraParameters.rawMessageData = {
    messages: [
      {
        content,
        bip44addressIndex: 0,
      },
    ],
  };
  transactionPayload.note = `BTC Message: ${message}`;
  try {
    const transactionResponse = await fireblocks.transactions.createTransaction(
      {
        transactionRequest: transactionPayload,
      },
    );
    //@ts-ignore
    console.log(transactionPayload.extraParameters.rawMessageData);
    const txId = transactionResponse.data.id;
    if (!txId) {
      throw new Error("Transaction ID is undefined.");
    }
    txInfo = await getTxStatus(txId);
    console.log(txInfo);
    return;
  } catch (error) {
    console.error(error);
  }
  const signature = txInfo.signedMessages[0].signature;

  console.log(JSON.stringify(signature));

  const encodedSig =
    Buffer.from([Number.parseInt(signature.v, 16) + 31]).toString("hex") +
    signature.fullSig;
  console.log(
    "Encoded Signature:",
    Buffer.from(encodedSig, "hex").toString("base64"),
  );
};

rawSign("My message23");

import { createHash } from "crypto";
import { FireblocksSDK, PeerType, TransactionOperation, TransactionStatus } from "fireblocks-sdk";

async function signArbitraryMessage(fireblocks: FireblocksSDK, vaultAccountId, message, bip44addressIndex = 0) {
    const wrappedMessage = "\x18Bitcoin Signed Message:\n" +  String.fromCharCode(message.length) + message;

    const hash = createHash('sha256').update(wrappedMessage, 'utf8').digest();

    const content = createHash('sha256').update(hash).digest("hex");

    const { status, id } = await fireblocks.createTransaction({
        operation: TransactionOperation.RAW,
        assetId: "BTC",
        source: {
            type: PeerType.VAULT_ACCOUNT,
            id: vaultAccountId
        },
        note: `BTC Message: ${message}`,
        extraParameters: {
            rawMessageData: {
                messages: [{
                    content,
                    bip44addressIndex
                }]
            }
        }
    });

    let txInfo;

  	while(currentStatus != TransactionStatus.COMPLETED && currentStatus != TransactionStatus.FAILED) {
        try {
            console.log("keep polling for tx " + id + "; status: " + currentStatus);
            txInfo = await apiClient.getTransactionById(id);
            currentStatus = txInfo.status;
        } catch (err) {
            console.log("err", err);
        }
        await new Promise(r => setTimeout(r, 1000));    
    };
  
    const signature = txInfo.signedMessages[0].signature;

    console.log(JSON.stringify(signature));

    const encodedSig = Buffer.from([Number.parseInt(signature.v,16) + 31]).toString("hex") + signature.fullSig;
    console.log("Encoded Signature:", Buffer.from(encodedSig,"hex").toString("base64"));
} 
 signArbitraryMessage(fireblocks, "0", "INSERT TEXT HERE").then(console.log).catch(console.log);ireiir

import binascii
from time import sleep
from hashlib import sha256
from ecdsa.util import sigencode_der
from fireblocks_sdk import TransferPeerPath, FireblocksSDK, RawMessage, UnsignedMessage, VAULT_ACCOUNT, \
    TRANSACTION_STATUS_COMPLETED, TRANSACTION_STATUS_FAILED


def sign_arbitrary_message(vault_id: str, message: str, bip44_address_index: int = 0):
    # Hash the message with sha256 (twice per Bitcoin standard)
    content = sha256(sha256(message.encode("utf-8")).digest()).hexdigest()
    
    # Create an API call to Fireblocks - RAW signing request
    tx_response = fireblocks.create_raw_transaction(
        asset_id="BTC",
        raw_message=RawMessage(
            [UnsignedMessage(content=content, bip44addressIndex=bip44_address_index)]
        ),
        source=TransferPeerPath(VAULT_ACCOUNT, vault_id),
        note=f"BTC Message: {message}",
    )
    
    # Get the transaction's status and id
    tx_status = tx_response["status"]
    tx_id = tx_response["id"]
    
    # Wait for the transaction to complete or to fail
    while tx_status != TRANSACTION_STATUS_COMPLETED and tx_status != TRANSACTION_STATUS_FAILED:
        print(f"Tx {tx_id} is not completed yet. Status: {tx_status}")
        tx_info = fireblocks.get_transaction_by_id(tx_id)
        tx_status = tx_info["status"]
        sleep(2)
    
    # If successfully completed - get the signature and DER encode it
    if tx_status == TRANSACTION_STATUS_COMPLETED:
        signature = tx_info["signedMessages"][0]["signature"]
        r_int = int(signature["r"], 16)
        s_int = int(signature["s"], 16)
        der_encoded_sig = sigencode_der(r_int, s_int, order=0)

        print(f"DER-Encoded HEX signature: {binascii.hexlify(der_encoded_sig).decode()}")
        return
    # Else - failed
    print("Transaction Failed")

if __name__ == '__main__':
    sign_arbitrary_message("0", "my_test_message")