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queryProtocolParameters

queryProtocolParameters is an asynchronous function that retrieves the current protocol parameters from the Hydra head. These parameters are essential for building and validating transactions on the Cardano blockchain.

Function Signature​

async queryProtocolParameters(): Promise<CommonProtocolParameters>

Parameters​

None.

Returns​

A Promise that resolves to a CommonProtocolParameters object, containing various network parameters such as minFeeA, minFeeB, maxTxSize, etc.

Example​

const { KuberHydraApiProvider } = require("kuber-client");

async function main() {
  const hydra = new KuberHydraApiProvider("http://localhost:8082");

  try {
    const protocolParams = await hydra.queryProtocolParameters();
    console.table({
      protocolVersion: `${protocolParams.protocolVersion.major}.${protocolParams.protocolVersion.minor}`,
      txFeeFixed: protocolParams.txFeeFixed,
      txFeePerByte: protocolParams.txFeePerByte,
      maxTxSize: protocolParams.maxTxSize,
      maxValueSize: protocolParams.maxValueSize,
      maxCollateralInputs: protocolParams.maxCollateralInputs,
      utxoCostPerByte: protocolParams.utxoCostPerByte,
    });
  } catch (error) {
    console.error("Error querying protocol parameters:", error);
  }
}

main();