Compare Decimal and Hexadecimal Chain IDs Correctly

A network nickname can be changed by software or a user. A numeric chain ID is a more precise comparison point, especially when the wallet, application and RPC response display the same number in different formats.

Recognize two representations of one number

RPC chain identifiers commonly appear as hexadecimal strings with a 0x prefix, while network settings often show decimal numbers. Base mainnet is decimal 8453, or hexadecimal 0x2105. Base Sepolia is 84532, or 0x14a34. These pairs represent the same respective integers. Compare converted numeric values rather than deciding that different-looking strings necessarily identify different chains. Do not confuse a chain identifier with a transaction hash or token address.

Make a three-column comparison

Write down the intended chain from official network documentation, the chain selected in the wallet and the chain reported by the data endpoint. Include which format each screen uses. If one differs, stop the intended operation and resolve the mismatch before considering a transaction. For example, a wallet showing 84532 and a request targeting 8453 disagree even though both may display the word Base. This comparison needs no account secret.

Understand the protection and its limits

EIP-155 describes including a chain ID in signed transaction replay protection. That role does not turn an RPC response into an authenticity certificate. A locally configured development node can report a familiar chain ID, and an untrusted server can provide misleading data. Verify the endpoint’s origin and network context as well. A correct chain number says nothing about whether a token contract or spender destination is the one you intended.

Use the result for diagnosis

Record any mismatch with the public network name and the relevant decimal value, without sharing private provider URLs. In RunixCoin, the public quote form targets 8453 regardless of the wallet network view. A network dropdown alone therefore cannot establish quote compatibility or enable execution. Preserve that distinction when describing a problem: wallet network, quote request chain and transaction network are separate observations to compare, not interchangeable labels.

References and verification

Reviewed . Product limits reflect inspected public interface code. These are educational checklists, not reports of tested mainnet transactions; browser behavior and execution were not verified.