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Autheo Chain uses the same gas model as Ethereum, with fees denominated in aauth (the base unit of THEO). This page explains how to estimate gas, set fees, and understand when a transaction is finalized.

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Fee denomination

All transaction fees are paid in aauth:
UnitConversion
1 aauthSmallest fee unit
1 THEO10¹⁸ aauth
Typical transfer fee~5,000,000 aauth (0.000005 THEO)

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Gas estimation

Use --gas auto with --gas-adjustment 1.5 for CLI transactions to avoid out-of-gas failures: 
autheod tx bank send mykey <recipient> 1000000000000000000aauth \
  --chain-id autheo_2127-1 \
  --keyring-backend file \
  --gas auto \
  --gas-adjustment 1.5 \
  --fees 5000000aauth
For EVM transactions, use eth_estimateGas: 
curl -X POST https://rpc1.autheo.com \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [{"from": "0x...", "to": "0x...", "value": "0xDE0B6B3A7640000"}],
    "id": 1
  }'

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Gas price

Query the current suggested gas price: 
curl -X POST https://rpc1.autheo.com \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_gasPrice","params":[],"id":1}'
In ethers.js: 
const feeData = await provider.getFeeData();
console.log("Gas price:", feeData.gasPrice.toString(), "aauth");

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Transaction lifecycle

1. Submit → mempool
2. Validator includes tx in next block (~5 seconds)
3. Block committed (1 confirmation = finalized in CometBFT)
4. Receipt available via eth_getTransactionReceipt
Autheo Chain uses CometBFT BFT consensus — one block confirmation is final. There are no reorgs. You do not need to wait for multiple confirmations as you would on Ethereum.

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Checking transaction status

CLI: 
autheod query tx <txhash> --chain-id autheo_2127-1
JSON-RPC: 
curl -X POST https://rpc1.autheo.com \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":["0x<txhash>"],"id":1}'
A receipt with "status": "0x1" means success. "status": "0x0" means the transaction was included but reverted.

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Common fee errors

ErrorCauseFix
insufficient funds for gasWallet balance too lowFund the account with more aauth
out of gasGas limit set too lowUse --gas auto --gas-adjustment 1.5
tx already in mempoolDuplicate transactionWait for existing tx to confirm or increase gas price
signature verification failedWrong chain IDPass --chain-id autheo_2127-1

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EIP-1559 support

Autheo Chain supports EIP-1559 fee transactions (type 2). Use maxFeePerGas and maxPriorityFeePerGas in ethers.js: 
const tx = await wallet.sendTransaction({
  to: recipient,
  value: ethers.parseEther("1.0"),
  maxFeePerGas: ethers.parseUnits("25", "gwei"),
  maxPriorityFeePerGas: ethers.parseUnits("1", "gwei")
});
await tx.wait(1); // 1 confirmation is final