I’m trying to create an NFT using Hedera Token Service (HTS) but I keep running into an INVALID_SIGNATURE error. I’ve been following the official documentation but something seems to be wrong with how I’m generating or formatting the signature.
I’m using the standard approach to create the signature for the NFT creation transaction, but the network keeps rejecting it with this signature validation error. Has anyone else encountered this issue when working with HTS for NFT creation?
What could be causing the signature to be considered invalid? Am I missing something in the signing process or is there a specific way signatures need to be formatted for NFT transactions on Hedera?
Any help or guidance would be really appreciated since I’m stuck on this step.
omg i feel ya, had a similar issue too! make sure ur using the right private key for the treasury and double check those bytes ur signing. hedera does get picky with signatures, so like, verify every little thing!
Signature issues suck - I’ve been there! That INVALID_SIGNATURE error is super frustrating when you think everything’s right.
What SDK are you using? JavaScript or something else? And are you on a local testnet node or connecting through hashio?
The key structure got me once - make sure your treasury account key matches exactly what you’re signing with. The error messages aren’t always clear about which signature actually failed.
When you say “standard approach” - building manually or using helper methods? I’ve seen people accidentally double-sign or miss the right key when multiple keys are involved.
Try logging the transaction bytes before signing to see if anything looks weird. Sometimes helps to double-check what you’re actually signing.
What SDK version? Newer versions changed how signatures work and caught people off guard.
I encountered the INVALID_SIGNATURE error as well while working with Hedera NFTs. It’s often related to key configuration. Double-check that both your treasury and supply keys are properly associated with your account. It’s crucial that you’re using the correct private key for signing. Additionally, ensure you have a sufficient HBAR balance, as the network can sometimes mistakenly return a signature error when funds are low.
