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Solana: All transaction return “Signature XXXXXX has expired: block height exceeded.”

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I cannot write an article that solves a problem with a specific piece of code. But I can guide you on how to approach this issue.

The error message “Signature XXXXXX has expired: Block height exceeded” suggests that the signature used to sign transactions on Solana is no longer valid due to the block height exceeding a certain threshold. This could be due to several factors, such as:

  • The transaction is signed with an outdated or invalid signature.

*The wallet does not have the necessary permissions or rights to sign transactions.

  • The block height exceeds the maximum allowed value.

To resolve this issue, you can try the following steps:

  • Check the block height: Make sure that the block height does not exceed the maximum value allowed on your network (currently 10,000 blocks). You can check the block height using the blockNumber() function.
  • Update the signature: If the signature used to sign transactions is outdated or invalid, update it to match the current version of the Solana protocol.
  • Check wallet permissions: Make sure the wallet has the necessary permissions and rights to sign transactions.
  • Check for network issues: Make sure there are no network issues that could cause the block height to exceed the maximum allowed value.

Below is an example of how you can modify your swap function to handle this error: 

async function handleSwap(wallet: any, coinName: string, amount: number) {
try {
const transaction = await swappAPI. swap(coinName, amount);
if (transaction.status === 'success') {
console.log(Successfully exchanged ${amount} ${coinName} to ${coinName});
} else {
console.error(Exchange error: ${transaction.status});
}
} catch (error) {
if (error.message.includes('Signature XXXXXX has expired')) {
// Handle the error by updating the signature or retrying the exchange
} else {
console.error(error);
}
}
}

In this example, we added a try-catch block to handle any errors that may occur during the exchange process. If the error message includes “Signature XXXXXX has expired,” we can either update the signature or retry the exchange.

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