BNB Chain networks, tokens, gas and transactions
BSC and opBNB are separate networks with different Chain IDs. Tokens are contracts on a specific network, while BNB is used to pay execution fees.
BSC and opBNB are separate networks with different Chain IDs. Tokens are contracts on a specific network, while BNB is used to pay execution fees.
What is a Chain ID?
It identifies the network a wallet or application is using. BSC mainnet is 56; opBNB mainnet is 204.
What is BEP-20?
BEP-20 is the common fungible-token standard used on BSC. A token name alone is not enough; verify its contract address.
Why can a failed transaction still cost gas?
Validators used computation to process the transaction even though its requested state change did not complete.
Why does a token not appear in a wallet?
The wallet may not have imported the token contract, the user may be on the wrong network, or the token may be fake.
What happens after sending through the wrong network?
Recovery depends on whether the destination controls the same address on that network and whether the receiving service supports recovery. It is never guaranteed.
What is an approval?
An approval authorizes a contract to spend a token. Unlimited approvals increase exposure if the approved contract or interface is compromised.
What may change
Network parameters, validator sets, governance processes, contracts, product availability and regulatory treatment can change. Verify operational facts before acting.