Transactions

qc_getTransactionCount

Returns the number of transactions sent from an address (nonce).

Parameter	Type	Description
`address`	`string`	20-byte address (hex)
`blockNumber`	`string`	Block number (hex) or tag

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getTransactionCount","params":["0xff81e5c74e14db5b4ee407d66b1b063c8f305c51","latest"],"id":1}'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x5"
}

qc_sendTransaction

Signs and sends a transaction from an unlocked account on the node.

Parameter	Type	Description
`from`	`string`	Sender address
`to`	`string`	Recipient address
`value`	`string`	Value in wei (hex)
`gas`	`string`	Gas limit (hex)
`gasPrice`	`string`	Gas price in wei (hex)
`data`	`string`	Contract call data (hex)
`nonce`	`string`	Transaction nonce (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "qc_sendTransaction",
    "params": [{
      "from": "0xff81e5c74e14db5b4ee407d66b1b063c8f305c51",
      "to": "0x1234567890abcdef1234567890abcdef12345678",
      "value": "0xde0b6b3a7640000",
      "gas": "0x5208"
    }],
    "id": 1
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xabc123...def456"
}

This method requires the sender account to be unlocked on the node. For production signing, use the Custody API or qc_sendRawTransaction with an externally signed payload.

qc_sendRawTransaction

Submits a pre-signed raw transaction. This is the standard method for submitting transactions signed by external key management systems.

Parameter	Type	Description
`signedTxData`	`string`	RLP-encoded signed transaction (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_sendRawTransaction","params":["0xf86c..."],"id":1}'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xabc123...def456"
}

qc_getTransactionByHash

Returns transaction details by transaction hash.

Parameter	Type	Description
`txHash`	`string`	32-byte transaction hash (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getTransactionByHash","params":["0xabc123...def456"],"id":1}'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "hash": "0xabc123...def456",
    "nonce": "0x5",
    "blockHash": "0xdef...789",
    "blockNumber": "0x1a4",
    "transactionIndex": "0x0",
    "from": "0xff81...c51",
    "to": "0x1234...5678",
    "value": "0xde0b6b3a7640000",
    "gas": "0x5208",
    "gasPrice": "0x3b9aca00",
    "input": "0x"
  }
}

qc_getTransactionReceipt

Returns the receipt of a mined transaction.

Parameter	Type	Description
`txHash`	`string`	32-byte transaction hash (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getTransactionReceipt","params":["0xabc123...def456"],"id":1}'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "transactionHash": "0xabc123...def456",
    "transactionIndex": "0x0",
    "blockHash": "0xdef...789",
    "blockNumber": "0x1a4",
    "from": "0xff81...c51",
    "to": "0x1234...5678",
    "gasUsed": "0x5208",
    "cumulativeGasUsed": "0x5208",
    "contractAddress": null,
    "logs": [],
    "status": "0x1",
    "effectiveGasPrice": "0x3b9aca00"
  }
}

qc_getRawTransactionByHash

Returns the RLP-encoded raw transaction by hash.

Parameter	Type	Description
`txHash`	`string`	32-byte transaction hash (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getRawTransactionByHash","params":["0xabc123...def456"],"id":1}'

qc_getTransactionByBlockNumberAndIndex

Returns a transaction by block number and transaction index.

Parameter	Type	Description
`blockNumber`	`string`	Block number (hex) or tag
`txIndex`	`string`	Transaction index (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getTransactionByBlockNumberAndIndex","params":["latest","0x0"],"id":1}'

qc_getTransactionByBlockHashAndIndex

Returns a transaction by block hash and transaction index.

Parameter	Type	Description
`blockHash`	`string`	32-byte block hash (hex)
`txIndex`	`string`	Transaction index (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getTransactionByBlockHashAndIndex","params":["0xdef...789","0x0"],"id":1}'

qc_getRawTransactionByBlockNumberAndIndex

Returns the RLP-encoded raw transaction by block number and index.

Parameter	Type	Description
`blockNumber`	`string`	Block number (hex) or tag
`txIndex`	`string`	Transaction index (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getRawTransactionByBlockNumberAndIndex","params":["latest","0x0"],"id":1}'

qc_getRawTransactionByBlockHashAndIndex

Returns the RLP-encoded raw transaction by block hash and index.

Parameter	Type	Description
`blockHash`	`string`	32-byte block hash (hex)
`txIndex`	`string`	Transaction index (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getRawTransactionByBlockHashAndIndex","params":["0xdef...789","0x0"],"id":1}'

qc_getBlockTransactionCountByNumber

Returns the number of transactions in a block by block number.

Parameter	Type	Description
`blockNumber`	`string`	Block number (hex) or tag

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getBlockTransactionCountByNumber","params":["latest"],"id":1}'

qc_getBlockTransactionCountByHash

Returns the number of transactions in a block by block hash.

Parameter	Type	Description
`blockHash`	`string`	32-byte block hash (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_getBlockTransactionCountByHash","params":["0xdef...789"],"id":1}'

qc_sign

Signs data with an unlocked account. Returns the signature.

Parameter	Type	Description
`address`	`string`	Signer address
`data`	`string`	Data to sign (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_sign","params":["0xff81e5c74e14db5b4ee407d66b1b063c8f305c51","0xdeadbeef"],"id":1}'

Requires the account to be unlocked on the node.

qc_signTransaction

Signs a transaction without broadcasting it. Returns the RLP-encoded signed transaction.

Parameter	Type	Description
`txObject`	`object`	Transaction object (same fields as `qc_sendTransaction`)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "qc_signTransaction",
    "params": [{
      "from": "0xff81e5c74e14db5b4ee407d66b1b063c8f305c51",
      "to": "0x1234567890abcdef1234567890abcdef12345678",
      "value": "0xde0b6b3a7640000",
      "gas": "0x5208"
    }],
    "id": 1
  }'

qc_pendingTransactions

Returns all pending transactions in the node’s transaction pool.

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qc_pendingTransactions","params":[],"id":1}'

qc_fillTransaction

Fills in default values (nonce, gas, gas price) for a transaction object without signing or submitting it.

Parameter	Type	Description
`txObject`	`object`	Partial transaction object

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "qc_fillTransaction",
    "params": [{
      "from": "0xff81e5c74e14db5b4ee407d66b1b063c8f305c51",
      "to": "0x1234567890abcdef1234567890abcdef12345678",
      "value": "0xde0b6b3a7640000"
    }],
    "id": 1
  }'

qc_resend

Replaces a pending transaction with new gas parameters. The original transaction is matched by from, nonce, and other fields.

Parameter	Type	Description
`txObject`	`object`	Original transaction object to match
`gasPrice`	`string`	New gas price (hex)
`gasLimit`	`string`	New gas limit (hex)

curl -X POST https://api.quantumapi.io/v1/rpc \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "qc_resend",
    "params": [{
      "from": "0xff81e5c74e14db5b4ee407d66b1b063c8f305c51",
      "to": "0x1234567890abcdef1234567890abcdef12345678",
      "value": "0xde0b6b3a7640000",
      "nonce": "0x5",
      "gasPrice": "0x3b9aca00",
      "gas": "0x5208"
    }, "0x77359400", "0x5208"],
    "id": 1
  }'

Get started

Operate

Build

JSON-RPC reference

qc_getTransactionCount

qc_sendTransaction

qc_sendRawTransaction

qc_getTransactionByHash

qc_getTransactionReceipt

qc_getRawTransactionByHash

qc_getTransactionByBlockNumberAndIndex

qc_getTransactionByBlockHashAndIndex

qc_getRawTransactionByBlockNumberAndIndex

qc_getRawTransactionByBlockHashAndIndex

qc_getBlockTransactionCountByNumber

qc_getBlockTransactionCountByHash

qc_sign

qc_signTransaction

qc_pendingTransactions

qc_fillTransaction

qc_resend

​qc_getTransactionCount

​qc_sendTransaction

​qc_sendRawTransaction

​qc_getTransactionByHash

​qc_getTransactionReceipt

​qc_getRawTransactionByHash

​qc_getTransactionByBlockNumberAndIndex

​qc_getTransactionByBlockHashAndIndex

​qc_getRawTransactionByBlockNumberAndIndex

​qc_getRawTransactionByBlockHashAndIndex

​qc_getBlockTransactionCountByNumber

​qc_getBlockTransactionCountByHash

​qc_sign

​qc_signTransaction

​qc_pendingTransactions

​qc_fillTransaction

​qc_resend

qc_getTransactionCount

qc_sendTransaction

qc_sendRawTransaction

qc_getTransactionByHash

qc_getTransactionReceipt

qc_getRawTransactionByHash

qc_getTransactionByBlockNumberAndIndex

qc_getTransactionByBlockHashAndIndex

qc_getRawTransactionByBlockNumberAndIndex

qc_getRawTransactionByBlockHashAndIndex

qc_getBlockTransactionCountByNumber

qc_getBlockTransactionCountByHash

qc_sign

qc_signTransaction

qc_pendingTransactions

qc_fillTransaction

qc_resend