How-To Guide
Governance Operations
Update Global Fee Parameters
Only governance can update Global Fee module parameters. Individual users cannot directly modify these settings.
neutrond tx gov submit-proposal proposal.json \
--from validator \
--chain-id neutron-1 \
--gas auto \
--gas-adjustment 1.5 \
--fees 1000untrn
{
"title": "Update Global Fee Parameters",
"description": "Adjust minimum gas prices and bypass message types",
"messages": [
{
"@type": "/gaia.globalfee.v1beta1.MsgUpdateParams",
"authority": "neutron10d07y265gmmuvt4z0w9aw880jnsr700j6zn9kn",
"params": {
"minimum_gas_prices": [
{
"denom": "untrn",
"amount": "0.025"
},
{
"denom": "ibc/C4CFF46FD6DE35CA4CF4CE031E643C8FDC9BA4B99AE598E9B0ED98FE3A2319F9",
"amount": "0.001"
}
],
"bypass_min_fee_msg_types": [
"/ibc.core.channel.v1.MsgRecvPacket",
"/ibc.core.channel.v1.MsgAcknowledgement",
"/ibc.core.client.v1.MsgUpdateClient",
"/ibc.core.channel.v1.MsgTimeout",
"/ibc.core.channel.v1.MsgTimeoutOnClose"
],
"max_total_bypass_min_fee_msg_gas_usage": 1000000
}
}
],
"deposit": "10000000untrn"
}
Add New Bypass Message Types
To allow certain message types to bypass minimum fees:
{
"title": "Add IBC Transfer to Fee Bypass",
"description": "Allow IBC transfers to bypass minimum fee requirements",
"messages": [
{
"@type": "/gaia.globalfee.v1beta1.MsgUpdateParams",
"authority": "neutron10d07y265gmmuvt4z0w9aw880jnsr700j6zn9kn",
"params": {
"minimum_gas_prices": [
{
"denom": "untrn",
"amount": "0.025"
}
],
"bypass_min_fee_msg_types": [
"/ibc.core.channel.v1.MsgRecvPacket",
"/ibc.core.channel.v1.MsgAcknowledgement",
"/ibc.core.client.v1.MsgUpdateClient",
"/ibc.core.channel.v1.MsgTimeout",
"/ibc.core.channel.v1.MsgTimeoutOnClose",
"/ibc.applications.transfer.v1.MsgTransfer"
],
"max_total_bypass_min_fee_msg_gas_usage": 1000000
}
}
]
}
Update Minimum Gas Prices
To adjust network-wide minimum gas prices:
{
"title": "Update Minimum Gas Prices",
"description": "Adjust minimum gas prices for network security",
"messages": [
{
"@type": "/gaia.globalfee.v1beta1.MsgUpdateParams",
"authority": "neutron10d07y265gmmuvt4z0w9aw880jnsr700j6zn9kn",
"params": {
"minimum_gas_prices": [
{
"denom": "untrn",
"amount": "0.050"
}
],
"bypass_min_fee_msg_types": [
"/ibc.core.channel.v1.MsgRecvPacket",
"/ibc.core.channel.v1.MsgAcknowledgement",
"/ibc.core.client.v1.MsgUpdateClient",
"/ibc.core.channel.v1.MsgTimeout",
"/ibc.core.channel.v1.MsgTimeoutOnClose"
],
"max_total_bypass_min_fee_msg_gas_usage": 1000000
}
}
]
}
Integration Patterns
Application Integration
Check Fee Requirements:
import (
"github.com/neutron-org/neutron/v6/x/globalfee/keeper"
"github.com/neutron-org/neutron/v6/x/globalfee/types"
)
func (app *App) checkGlobalFee(ctx sdk.Context, tx sdk.Tx) error {
params := app.GlobalFeeKeeper.GetParams(ctx)
// Check if transaction meets minimum fee requirements
if !meetsMinimumFee(tx, params.MinimumGasPrices) {
return types.ErrInsufficientFee
}
return nil
}
func calculateRequiredFee(gasUsed uint64, minGasPrices sdk.DecCoins) sdk.Coins {
requiredFees := make(sdk.Coins, len(minGasPrices))
for i, gp := range minGasPrices {
fee := gp.Amount.MulInt64(int64(gasUsed)).Ceil().TruncateInt()
if fee.IsPositive() {
requiredFees[i] = sdk.NewCoin(gp.Denom, fee)
}
}
return requiredFees
}
Client Integration
Query Current Parameters:
const client = await SigningCosmWasmClient.connectWithSigner(rpcUrl, signer);
const params = await client.queryContractSmart(
"neutron1...", // Global fee module address
{ params: {} }
);
console.log("Minimum gas prices:", params.minimum_gas_prices);
console.log("Bypass message types:", params.bypass_min_fee_msg_types);
function calculateMinimumFee(gasEstimate, minGasPrices) {
return minGasPrices.map(price => ({
denom: price.denom,
amount: Math.ceil(gasEstimate * parseFloat(price.amount)).toString()
}));
}
// Usage
const gasEstimate = 200000;
const minFee = calculateMinimumFee(gasEstimate, params.minimum_gas_prices);
Monitoring and Alerts
Fee Bypass Monitoring
Track Bypass Usage:
# Monitor bypass message types in transactions
neutrond query txs --events 'message.action=/ibc.core.channel.v1.MsgRecvPacket' \
--page 1 --limit 100
# Check total gas usage for bypass transactions
neutrond query block [height] | jq '.block.data.txs[] | select(.body.messages[].type_url | contains("MsgRecvPacket"))'
Parameter Change Alerts
Monitor Parameter Updates:
# Subscribe to parameter change events
neutrond query txs --events 'message.action=/gaia.globalfee.v1beta1.MsgUpdateParams'
Best Practices
Fee Setting Strategy
- Multi-Asset Support: Configure multiple denominations for flexibility
- Economic Security: Set fees high enough to prevent spam
- User Experience: Balance security with accessibility
- Market Conditions: Adjust based on token prices and network usage
Bypass Configuration
- Essential Operations: Only bypass critical IBC protocol operations by default
- Gas Limits: Set appropriate gas limits for bypass operations
- Security Review: Regularly audit bypass message types
- Community Input: Involve community in bypass decisions
Monitoring
- Fee Revenue: Track fee collection and distribution
- Bypass Usage: Monitor abuse of fee bypass mechanisms
- Network Health: Ensure fees maintain network security
- User Impact: Monitor transaction costs and user behavior
Troubleshooting
Common Issues
Insufficient Fee Error:
Error: insufficient fee: got 1000untrn, required 2500untrn
Error: message type not in bypass list
bypass_min_fee_msg_types parameter.
Gas Limit Exceeded:
Error: total gas usage 1500000 exceeds bypass limit 1000000
