Gas

Gas measures the computational effort required to execute a transaction or contract on Paxeer Network. Gas fees are paid in PAX (denominated in uhpx on the Cosmos side).

Key terms and concepts

Gas

A unit representing the work done to execute a transaction. Gas varies based on operation complexity.

Gas price

The amount of PAX paid per unit of gas. Set by the user.

Gas limit

The maximum gas the transaction may consume. If too low, the transaction fails and the full gas limit is consumed.

Fee

Fee = Gas Price × Gas Used

The gas limit caps the maximum charge at Gas Price × Gas Limit. On Paxeer, excess gas may not be fully refunded, so avoid setting gas limits far above what a transaction needs.

Maximum gas

Query the maximum gas limit from the RPC node using the /consensus_params endpoint.

Minimum gas price

Paxeer enforces minimum gas prices to prevent spam.

Max bytes

Each transaction has a maximum size in bytes. Query via /consensus_params.

Max gas for queries

Queries consume gas. The maximum is RPC-specific.

Sending gas in transactions

Using paxd

With paxd, set the fee using the --fees flag. Gas limit and gas price use --gas and --gas-prices respectively.

paxd tx bank send <from_address> <to_address> <amount> --gas <gas_limit> --gas-prices <gas_price> --fees <fee>

Using EVM (wagmi)

import { parseEther, parseGwei } from 'viem';
import { sendTransaction } from '@wagmi/core';
import { config } from './config'; // your wagmi config

await sendTransaction(config, {
  to: '0xRecipientAddress',
  value: parseEther('1'), // 1 PAX
  gasPrice: parseGwei('100'), // 100 gwei
  gas: 21000n
});

Optimizing gas for smart contracts

• Minimize storage operations.
• Use fixed-size data structures where possible.
• Avoid unnecessary computations.
• Use events for data that doesn't need on-chain reads.

Estimating gas prices

Paxeer's EVM RPC exposes standard Ethereum JSON-RPC methods for gas estimation:

• eth_gasPrice - current recommended gas price for legacy transactions.
• eth_maxPriorityFeePerGas - suggested priority fee for EIP-1559 transactions.
• eth_feeHistory - recent base fees and priority-fee percentiles.

Query the current gas price on mainnet:

curl -sS https://public-rpc.paxeer.app/evm/reference \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_gasPrice","params":[],"id":1}'

With viem:

import { createPublicClient, http, defineChain } from 'viem';

const paxeer = defineChain({
  id: 125,
  name: 'Paxeer Network',
  nativeCurrency: { name: 'PAX', symbol: 'PAX', decimals: 18 },
  rpcUrls: {
    default: { http: ['https://public-rpc.paxeer.app/evm/reference'] }
  }
});

const client = createPublicClient({
  chain: paxeer,
  transport: http()
});

// Legacy gas price
const gasPrice = await client.getGasPrice();

// EIP-1559 fee suggestion
const { maxFeePerGas, maxPriorityFeePerGas } = await client.estimateFeesPerGas();