Promise failed: Error: Given input "[object Promise]" is not a number.

[MAhmedSaeedi]

Expected behavior

Mint nft token on polygon testnet mumbai

Actual behavior

Promise failed: Error: Given input "[object Promise]" is not a number.

Steps to reproduce the behavior

Logs

---

Promise failed: Error: Given input "[object Promise]" is not a number.
at Object.numberToHex (C:\Users\Ahmed\Documents\nft_apis\node_modules\web3-utils\lib\utils.js:236:15)
at C:\Users\Ahmed\Documents\nft_apis\node_modules\web3-core-helpers\lib\formatters.js:145:30
at Array.forEach ()
at _txInputFormatter (C:\Users\Ahmed\Documents\nft_apis\node_modules\web3-core-helpers\lib\formatters.js:144:8)
at Object.inputCallFormatter (C:\Users\Ahmed\Documents\nft_apis\node_modules\web3-core-helpers\lib\formatters.js:157:15)
at signed (C:\Users\Ahmed\Documents\nft_apis\node_modules\web3-eth-accounts\lib\index.js:139:50)
at C:\Users\Ahmed\Documents\nft_apis\node_modules\web3-eth-accounts\lib\index.js:224:16
at processTicksAndRejections (node:internal/process/task_queues:96:5)

Environment

[luu-alex]

Hey, it seems like your promise is not being completed, web3.eth.accounts.signTransaction returns a callback function

so instead of doing:
const signPromise = web3.eth.accounts.signTransaction(tx, process.env.PRIVATE_KEY);

This should work
web3.eth.accounts.signTransaction(tx, process.env.PRIVATE_KEY).then(signedTx) => { ...

I don't think this is an issue with web3.js so i'll close up this issue.