Execute

curl -X POST https://zap.dzap.io/v1/broadcast \
  -H "Content-Type: application/json" \
  -d '{
    "txId": "0xabc...",
    "chainId": 8453,
    "txData": "0x02f8b0..."
  }'

const result = await dzap.broadcastZapTx({
  txId: '0xabc...',
  chainId: 8453,
  txData: '0x02f8b0...', // signed raw transaction
});

if (result.status === 'success') {
  console.log('Broadcast tx hash:', result.txnHash);
} else {
  console.error('Broadcast failed:', result.message);
}

{
  "status": "success",
  "data": {
    "txnHash": "0xdef456...",
    "txnId": "0xabc..."
  }
}

{
  "status": "error",
  "data": {
    "message": "transaction underpriced"
  }
}

POST

broadcast

curl -X POST https://zap.dzap.io/v1/broadcast \
  -H "Content-Type: application/json" \
  -d '{
    "txId": "0xabc...",
    "chainId": 8453,
    "txData": "0x02f8b0..."
  }'

const result = await dzap.broadcastZapTx({
  txId: '0xabc...',
  chainId: 8453,
  txData: '0x02f8b0...', // signed raw transaction
});

if (result.status === 'success') {
  console.log('Broadcast tx hash:', result.txnHash);
} else {
  console.error('Broadcast failed:', result.message);
}

{
  "status": "success",
  "data": {
    "txnHash": "0xdef456...",
    "txnId": "0xabc..."
  }
}

{
  "status": "error",
  "data": {
    "message": "transaction underpriced"
  }
}

After building a transaction with /v1/buildTx (or /v1/bundle/buildTx) and signing the resulting calldata client-side, submit it here for the DZap relay to broadcast on-chain.

Body

txId

string

required

The txnId returned for the step in the build-transaction response.

chainId

integer

required

Chain ID the transaction should be broadcast on.

txData

string | object[]

required

The signed transaction payload. For most EVM steps this is a raw signed-transaction hex string. For HyperLiquid steps it’s an array of { message, primaryType, signatureChainId, signature, account } typed-data signature objects instead.

Response

status

string

"success" or "error".

data.txnHash

string

On-chain transaction hash. Present when status is "success".

data.txnId

string

Echoes the txId you submitted. Present when status is "success".

data.message

string

Error details. Present when status is "error".

Examples

curl -X POST https://zap.dzap.io/v1/broadcast \
  -H "Content-Type: application/json" \
  -d '{
    "txId": "0xabc...",
    "chainId": 8453,
    "txData": "0x02f8b0..."
  }'

const result = await dzap.broadcastZapTx({
  txId: '0xabc...',
  chainId: 8453,
  txData: '0x02f8b0...', // signed raw transaction
});

if (result.status === 'success') {
  console.log('Broadcast tx hash:', result.txnHash);
} else {
  console.error('Broadcast failed:', result.message);
}

{
  "status": "success",
  "data": {
    "txnHash": "0xdef456...",
    "txnId": "0xabc..."
  }
}

{
  "status": "error",
  "data": {
    "message": "transaction underpriced"
  }
}

Once broadcast, poll /v1/status (with chainId and txnHash) to track settlement, especially for cross-chain steps.

Last modified on July 14, 2026

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