This guide explains how to use the feemarket module to implement dynamic fee calculation for standard Cosmos SDK transactions on the cheqd network. The feemarket module provides real-time gas pricing based on network congestion and demand.
Note: Identity transactions (DIDs and DID-Linked Resources) have their own fixed pricing model and are not affected by the feemarket module's dynamic pricing.
Understanding Dynamic Fees
Dynamic fees adjust transaction costs based on network conditions:
High Network Activity: Gas prices increase to prioritize transactions
Low Network Activity: Gas prices decrease to reduce transaction costs
Real-time Pricing: Prices update continuously based on network demand
Gas Price Endpoints
You can fetch current gas prices directly from the cheqd network APIs:
Mainnet
GET https://api.cheqd.net/feemarket/v1/gas_price/ncheq
Testnet
GET https://api.cheqd.network/feemarket/v1/gas_price/ncheq
API Response Format
The API returns a decimal value that needs to be converted:
async function monitorFeeMarket() {
const { sdk } = await initializeSDKWithFeemarket();
const feemarketModule = new FeemarketModule(sdk.signer, sdk.querier);
console.log('📊 Monitoring fee market...');
const monitorInterval = setInterval(async () => {
try {
const gasPrice = await feemarketModule.generateSafeGasPriceByDenom('ncheq');
const timestamp = new Date().toISOString();
console.log(`[${timestamp}] Gas Price: ${gasPrice.amount}${gasPrice.denom}`);
// Alert if price is unusually high
if (parseInt(gasPrice.amount) > 10000) {
console.warn('⚠️ High network congestion detected!');
console.log('💡 Consider waiting for lower fees or using fee abstraction');
}
} catch (error) {
console.error('Error monitoring fees:', error);
}
}, 30000); // Check every 30 seconds
// Stop monitoring after 5 minutes
setTimeout(() => {
clearInterval(monitorInterval);
console.log('📊 Fee monitoring stopped');
}, 300000);
}
async function robustTransactionWithDynamicFees(messages: any[], sender: string) {
const { sdk } = await initializeSDKWithFeemarket();
const feemarketModule = new FeemarketModule(sdk.signer, sdk.querier);
let retries = 3;
while (retries > 0) {
try {
// Get fresh gas price for each attempt
const gasPrice = await feemarketModule.generateSafeGasPriceByDenom('ncheq');
const estimatedGas = await estimateOptimalGas(messages, sender);
const fee = FeemarketModule.generateFeesFromGasPrice(gasPrice, sender, estimatedGas);
const result = await sdk.signer.signAndBroadcast(
sender,
messages,
fee,
'Transaction with retry logic'
);
if (result.code === 0) {
console.log('✅ Transaction successful!');
return result;
} else {
throw new Error(`Transaction failed: ${result.rawLog}`);
}
} catch (error) {
retries--;
console.warn(`⚠️ Attempt failed, ${retries} retries left:`, error);
if (retries > 0) {
// Wait before retry with exponential backoff
await new Promise(resolve => setTimeout(resolve, (4 - retries) * 1000));
} else {
throw error;
}
}
}
}
async function handleTransactionErrors(result: any) {
switch (result.code) {
case 5:
console.error('❌ Insufficient funds for gas');
console.log('💡 Add more tokens to your account');
break;
case 11:
console.error('❌ Out of gas');
console.log('💡 Increase gas limit or optimize transaction');
break;
case 32:
console.error('❌ Account not found');
console.log('💡 Verify account address and funding');
break;
default:
console.error(`❌ Transaction failed with code ${result.code}`);
console.log(`Raw log: ${result.rawLog}`);
}
}
