> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tavchain.safeney.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fees and resource limits

> Learn how gas is paid in Test TAV, how to estimate transaction fees and why execution gas differs from public RPC usage limits.

Tavchain transactions pay gas in Test TAV. The amount of gas depends on the work performed: a native transfer and a contract deployment can have different costs.

## Estimate before signing

Let your wallet or compatible tool estimate gas and display the fee. Review that quote before approving a transaction and leave enough TAV in the sender account to pay it. A failed execution can still charge gas.

Fees vary with execution and network conditions. A recorded tutorial fee is not a current quote, and there is no fixed fiat price for Test TAV.

## Amounts and precision

TAV has 18 decimals. Base amounts are integer `atav` values; Ethereum RPC quantity fields use hexadecimal. Use integer-safe conversion when displaying balances and fees.

## Gas versus API limits

Transaction gas meters execution. RPC rate, batch and query limits protect the public API and are documented in [Ethereum JSON-RPC](https://docs.tavchain.safeney.com/tavchain/http-api.md). They are not a network throughput benchmark or a transaction-fee schedule.

[Get Test TAV](https://docs.tavchain.safeney.com/tavchain/faucet.md) · [Tavcoin units](https://docs.tavchain.safeney.com/tavchain/learn/tavcoin.md) · [Transaction lifecycle](https://docs.tavchain.safeney.com/tavchain/learn/transactions.md)


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