Gas Costs

What Are Gas Fees?

Gas fees are network transaction costs paid to blockchain validators for processing your transactions.

Key Points:

• Paid in ETH only (never TBASE)

• Separate from platform fees

• Vary based on network congestion

• Go to validators, not AstaVerse

• Transparent on Base Sepolia

Gas Fee Breakdown by Action

Action	Estimated Gas	Cost (ETH)	Who Pays
Connect Wallet	Free	0 ETH	No one
Create Auction	~50,000 gas	~0.0001 ETH	Seller
Place Bid	~45,000 gas	~0.00009 ETH	Bidder
Confirm Delivery	~40,000 gas	~0.00008 ETH	Buyer
Claim Refund	~35,000 gas	~0.00007 ETH	Buyer
End Auction	~50,000 gas	~0.0001 ETH	Seller
File Dispute	~30,000 gas	~0.00006 ETH	Either party
Admin Resolution	~60,000 gas	~0.00012 ETH	Platform

Average Total Gas Costs:

Complete Auction Lifecycle:
   Create: 0.0001 ETH
   + 5 Bids: 0.00045 ETH
   + Confirm: 0.00008 ETH
   = Total: ~0.00063 ETH (seller + buyers combined)

Why Gas Fees Exist

What Gas Pays For:

Validator Rewards - Compensate network validators Network Security - Prevent spam attacks Blockchain Processing - Execute smart contract code Data Storage - Store transaction on blockchain Decentralization - Maintain distributed network

Important:

• AstaVerse does NOT receive gas fees

• All gas goes to Base Sepolia validators

• Fully visible on blockchain explorer

• Same system as Ethereum mainnet

Gas on Base Sepolia vs Ethereum Mainnet

Network	Avg Gas per Tx	Why Different
Ethereum Mainnet	$5-50	High demand, congestion
Base Sepolia (Testnet)	$0.0001-0.001	Low usage, free testnet
Base Mainnet (Future)	$0.01-0.10	L2 scaling, efficient

Base Benefits:

• 99% cheaper than Ethereum mainnet

• Faster transactions (1-2 seconds)

• Same security (inherits from Ethereum)

• Predictable costs (stable gas prices)

Estimating Gas Before Transactions

MetaMask Shows:

┌─────────────────────────────────┐
│  Estimated Gas Fee              │
│  0.00009 ETH (~$0.20)          │
│                                 │
│  Gas Limit: 45,000             │
│  Max Priority Fee: 0.0000001   │
│  Max Fee: 0.000002             │
└─────────────────────────────────┘

What This Means:

• Gas Limit: Maximum gas transaction can use

• Max Fee: Highest amount you'll pay

• Actual Cost: Usually less than max

• Refund: Unused gas returned to wallet

Gas-Saving Tips

For Sellers:

Create auctions during low activity - Weekday mornings cheaper Batch similar items - One auction vs multiple Set longer durations - Fewer early-end transactions Let auctions auto-end - Saves manual end-auction gas

For Buyers:

Place one strategic bid - Avoid bid wars (multiple gas fees) Bid early - Less competition = lower gas prices Confirm promptly - Avoid last-minute rush Check gas before bidding - Wait if unusually high

For Everyone:

Keep ETH in wallet - Minimum 0.001 ETH for gas buffer Use testnet wisely - Free ETH from faucet, no real cost Monitor network status - Check Base Sepolia gas tracker Batch transactions - Do multiple actions in one session

Gas Price Monitoring

Check Current Gas Prices:

1. MetaMask:

   • Shows estimate before every transaction

   • Displays in ETH and USD

2. Base Sepolia Explorer:

   • Real-time gas price tracker

   • Historical data charts

3. AstaVerse Dashboard:

   • Average gas costs displayed (future feature)

Payment Flow Examples

Example 1: Buyer Wins Image Auction (ETH)

┌─────────────────────────────────────┐
│  Image Auction - 0.5 ETH            │
└─────────────────────────────────────┘

BUYER PAYS:
   Winning Bid: 0.5 ETH
   + Gas Fee: 0.00009 ETH
   = Total: 0.50009 ETH

BUYER RECEIVES:
   NFT Certificate (instant)
   High-res image file
   Blockchain ownership proof

SELLER RECEIVES:
   Success Fee (5%): -0.025 ETH
   = Payout: 0.475 ETH

PLATFORM RECEIVES:
   Platform Fee: 0.0006 ETH (paid at creation)
   + Success Fee: 0.025 ETH
   = Total: 0.0256 ETH

Example 2: Buyer Wins Physical Auction (TBASE)

┌─────────────────────────────────────┐
│  Physical Auction - 200 TBASE       │
└─────────────────────────────────────┘

BUYER PAYS:
   Winning Bid: 200 TBASE
   + Gas Fee: 0.00009 ETH
   = Total: 200 TBASE + 0.00009 ETH

ESCROW PERIOD:
   Funds locked: 200 TBASE
   Delivery window: 14 days
   Buyer can confirm or dispute

AFTER CONFIRMATION:
   Success Fee (5%): -10 TBASE
   
SELLER RECEIVES:
   = Payout: 190 TBASE

PLATFORM RECEIVES:
   Platform Fee: 0.0013 ETH (paid at creation)
   + Success Fee: 10 TBASE

Example 3: Auction Ends with No Bids

┌─────────────────────────────────────┐
│  Digital Auction - No Bids          │
└─────────────────────────────────────┘

SELLER PAYS:
   Platform Fee: 0.0009 ETH (at creation)
   + Gas Fee: 0.0001 ETH
   = Total: 0.001 ETH

SELLER RECEIVES:
   Nothing (no bids)

PLATFORM RECEIVES:
   Platform Fee: 0.0009 ETH only
   Success Fee: 0 (no sale)

OUTCOME:
   ❌ Auction didn't sell
   Seller lost platform fee
   Can create new auction

Example 4: Buyer Wins Dispute (Refund)

┌─────────────────────────────────────┐
│  Physical Auction - 1.0 ETH         │
│  Buyer Dispute: Item Damaged        │
└─────────────────────────────────────┘

INITIAL PAYMENT:
   Buyer Paid: 1.0 ETH (locked in escrow)

DISPUTE FILED:
   Evidence: Unboxing video shows damage
   Admin Decision: Refund buyer

REFUND ISSUED:
   Buyer Receives: 1.0 ETH (full refund)
   Success Fee: 0 ETH (not charged on refund)

SELLER RECEIVES:
   Nothing (lost dispute)
   Reputation: Negative mark

PLATFORM RECEIVES:
   Platform Fee: 0.0013 ETH only (from creation)
   Success Fee: 0 ETH (refund = no fee)

📊 Fee Comparison Table

AstaVerse vs Traditional Platforms

Platform	Listing Fee	Success Fee	Buyer Premium	Withdrawal Fee	Total Fees
AstaVerse	$0.20-0.40	5%	None	None	~5-6%
eBay	Free	13.25%	None	PayPal 3%	~16%
OpenSea	Free	2.5%	None	Gas $5-50	~3-10%
Sotheby's	None	25%	25%	Wire 2%	~50%
Heritage	None	20%	20%	Check 1%	~40%

AstaVerse Advantages:

Lowest total fees - ~5-6% vs 16-50% No buyer premium - Buyers pay bid amount only No withdrawal fees - Keep 95% of sale Predictable costs - No hidden charges Blockchain transparency - Verify all fees