Gas

Gas is the unit that measures the computational workload required to execute transactions or contracts on the ENI network.

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Key Terms and Concepts

Gas

Gas is a measure of the amount of work required to execute a transaction, and its value varies according to the complexity of the transaction being executed.

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Gas Price

Gas Price refers to the amount of $ENI a user is willing to pay per unit of gas.

Users can set the gas price to influence transaction fees.

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Gas Limit

Gas limit is the maximum amount of gas a user wants to use for a transaction. If the gas limit is set too low, a node attempting to execute the transaction will run out of gas, fail to complete the transaction, and consume the entire specified gas limit.

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Fees

Fees = Gas Price * Gas Limit.

• curl -H "Authorization: your-apikey-here" https://api.blocknative.com/gasprices/blockprices?chainid=$CHAIN_ID

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Maximum Gas

The maximum gas limit for transactions ensures that complex transactions do not consume excessive resources. You can check the ENI registry or query an RPC node using /consensus_params (i.e., https://rpc.eniac.network/consensus_params) to find the maximum gas limit for each chain.

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Minimum Gas Price

ENI enforces a minimum gas price to prevent junk transactions. These prices are set by chain and detailed in the chain registry.

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Maximum Byte Size

Each transaction has a maximum byte limit, defined by each chain. This limit can be retrieved by querying the /consensus_params endpoint of an RPC node.

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Maximum Gas Limit for Queries

Since queries also consume gas, they have a maximum gas limit. This limit is specific to each RPC provider, so check with your provider to determine the maximum gas limit for your query.

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Sending Gas in Transactions

When submitting a transaction for broadcast, the user needs to specify the gas price and the gas limit to determine the fee.

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Using enid

When using enid, fees are set via the --fees flag, and gas limits and gas prices can be set via the --gas and --gas-prices flags, respectively.

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

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Using CosmJS

In any CosmJS transaction, the gas fee must be specified using the StdFee object.

const fee = {
  amount: [{ denom: 'ueni', amount: '5000' }],
  gas: '200000'
};
const result = await client.signAndBroadcast(address, [msg], fee, memo);

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Using EVM (wagmi)

import { sendTransaction } from 'wagmi/actions';

sendTransaction({
  request: {
    to: '0xRecipientAddress',
    value: '1000000000000000000',   // 1 ENI
    gasPrice: '100000000000',       // 100 Gwei
    gasLimit: '21000'
  }
});

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Optimizing Gas Prices for Smart Contracts

Best Practices for Efficient Gas Usage:

• Minimize storage operations: Storage is expensive in terms of gas.

• Use fixed-size data structures: They are more gas-efficient.

• Avoid unnecessary computations: Streamline your smart contract logic.

Optimizing gas usage ensures lower costs and faster execution for smart contracts on the ENI network.