I’ve created a testnet transaction utilizing blockcypher API and BitcoinJs-lib , I guarantee solely unpsent stability are added to my trasaction enter

But it surely’s returning error:

Error validating transaction: Transaction abdb49e4....f72497 referenced by enter 0 of ef480....0ffc0e5 has already been spent..'

here’s a pattern code I am working

const btcnetwork = BitcoinJsLib.networks.testnet
 const bip32 = BIP32Factory(tinySec)
 const rootSeed = await bip39.mnemonicToSeed(mnemonic)
 const root = bip32.fromSeed(rootSeed, btcnetwork)
 const accountNode = root.derivePath("m/84'/1'/0'")
 const addressNode = accountNode.derive(0).derive(0)
 const p2wpkh = funds.p2wpkh({
 pubkey: addressNode.publicKey,
 community: btcnetwork,
        })
 const p2sh = funds.p2sh({
 redeem: p2wpkh,
 community: btcnetwork
        })
 const psbt = new BitcoinJsLib.Psbt({ community: btcnetwork })
 
 const unspentTxOuts = await fetch(`https://api.blockcypher.com/v1/btc/test3/addrs/${p2wpkh.deal with}/full`).then(response => response.json());
 let inputIndex = -1
 let totalValue = 0
 for (let i = 0; i < unspentTxOuts.txs.size; i++) {
 const tx = unspentTxOuts.txs[i]
 for (let j = 0; j < tx.outputs.size; j++) {
 const output = tx.outputs[j]
 if (output.addresses[0]  === p2wpkh.deal with && !output.spent_by) {
 totalValue += output.worth
 inputIndex = tx.inputs[0].output_index,
 psbt.addInput({
 hash: tx.hash,
 index: tx.inputs[0].output_index,
 witnessUtxo: {
 script: Buffer.from(output.script, 'hex'),
 worth: output.worth
                },
 redeemScript: p2sh.redeem?.output
              })
 break
            }
          }
        }
 if (inputIndex === -1 && totalValue < (Math.ground(quantity * 1e8) - 1000)) {
 console.log(`No unspent transaction outputs discovered for deal with ${p2sh.deal with}`)
 return
        }
 psbt.addOutput({
 deal with: recipientAddress,
 worth: Math.ground(quantity * 1e8),
        })
 const changeValue = unspentTxOuts.final_balance -  Math.ground(quantity * 1e8) - 1000; // Calculate change worth with a charge of 1000 satoshi
 if (changeValue > 0) {
 psbt.addOutput({
 deal with: p2wpkh.deal with,
 worth: changeValue,
          });
        }
 for (let i = 0; i < psbt.inputCount; i++) {
 psbt.signInput(i, addressNode)
        }
 psbt.finalizeAllInputs()
 const txHex = psbt.extractTransaction().toHex()
 const consequence = await fetch('https://api.blockcypher.com/v1/btc/test3/txs/push', {
 technique: 'POST',
 physique: JSON.stringify({ tx: txHex }),
 headers: { 'Content material-Sort': 'software/json' },
        })
 const res = await consequence.json()
 console.log(`Despatched ${quantity} BTC to ${recipientAddress} from ${p2wpkh.deal with}, TX Hash: ${res?.txid}`)
 

I do know I solely had enter which can be unspent and the blockcypher api’s are good, is there one thing I am lacking please?