qc_gasPrice
Returns the current gas price in wei.
curl -X POST http://localhost:8545 \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"qc_gasPrice","params":[],"id":1}'
{
"jsonrpc": "2.0",
"id": 1,
"result": "0x3b9aca00"
}
qc_maxPriorityFeePerGas
Returns the suggested priority fee (tip) per gas for EIP-1559 transactions.
curl -X POST http://localhost:8545 \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"qc_maxPriorityFeePerGas","params":[],"id":1}'
{
"jsonrpc": "2.0",
"id": 1,
"result": "0x3b9aca00"
}
qc_feeHistory
Returns historical gas fee data. Useful for estimating future fees.
| Parameter | Type | Description |
|---|
blockCount | string | Number of blocks to look back (hex, max 1024) |
newestBlock | string | Block number (hex) or tag |
rewardPercentiles | number[] | Percentiles to sample effective priority fees at (e.g. [25, 50, 75]) |
curl -X POST http://localhost:8545 \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"method": "qc_feeHistory",
"params": ["0x4", "latest", [25, 50, 75]],
"id": 1
}'
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"oldestBlock": "0x1a1",
"baseFeePerGas": ["0x3b9aca00", "0x3b9aca00", "0x3b9aca00", "0x3b9aca00", "0x3b9aca00"],
"gasUsedRatio": [0.021, 0.0, 0.0, 0.015],
"reward": [
["0x3b9aca00", "0x3b9aca00", "0x3b9aca00"],
["0x0", "0x0", "0x0"],
["0x0", "0x0", "0x0"],
["0x3b9aca00", "0x3b9aca00", "0x3b9aca00"]
]
}
}
qc_estimateGas
Estimates the gas needed to execute a transaction. The transaction is not sent.
| Parameter | Type | Description |
|---|
txObject | object | Transaction call object |
blockNumber | string | (optional) Block number (hex) or tag |
curl -X POST http://localhost:8545 \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"method": "qc_estimateGas",
"params": [{
"from": "0xff81e5c74e14db5b4ee407d66b1b063c8f305c51",
"to": "0x1234567890abcdef1234567890abcdef12345678",
"value": "0xde0b6b3a7640000"
}],
"id": 1
}'
{
"jsonrpc": "2.0",
"id": 1,
"result": "0x5208"
}
0x5208 = 21000 gas — the base cost of a simple QC transfer.
