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Steps that I followed to do a transaction which creates a P2TR output:

1. Copy XPUB from test vectors mentioned in BIP 86

xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ

2. Convert XPUB (mainnet) to TPUB (testnet) using Bitcoin Extended Public Key Converter

tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB

3. Create a blank descriptor wallet with private keys disabled:

bitcoin-cli -named createwallet wallet_name=taproot_wallet blank=true disable_private_keys=true descriptors=true

4. Save the descriptor info in a text file for TPUB we got from step 2 (descriptor.txt):

[
  {
    "desc": "tr([8868ab13/86'/1'/0']tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB/0/*)#06sjusfa",
    "timestamp": "now",
    "active": true,
    "internal": false,
    "range": [
      0,
      999
    ],
    "next": 0
  }
]

I have copied this format from listdescriptors output for a new descriptor wallet that had private keys enabled.

5. Import this descriptor in wallet we created in step 3:

bitcoin-cli -rpcwallet=taproot_wallet importdescriptors "$(cat descriptor.txt)"

6. This is a watch only wallet with a taproot descriptor TPUB that can be used to create new bech32m address:

bitcoin-cli -rpcwallet=taproot_wallet getnewaddress

tb1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqp3mvzv

7. Send some bitcoin from another wallet:

https://blockstream.info/testnet/tx/2035ead4a9d0c8e2da1184924abc9034d26f2a7093371183ef12891623b235d1

I had compiled bitcoind with branch used by Sjors Provoost in PR #2260

Steps that I followed to do a transaction which creates a P2TR output:

1. Copy XPUB from test vectors mentioned in BIP 86

xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ

2. Convert XPUB (mainnet) to TPUB (testnet) using Bitcoin Extended Public Key Converter

tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB

3. Create a blank descriptor wallet with private keys disabled:

bitcoin-cli -named createwallet wallet_name=taproot_wallet blank=true disable_private_keys=true descriptors=true

4. Save the descriptor info in a text file for TPUB we got from step 2 (descriptor.txt):

[
  {
    "desc": "tr([8868ab13/86'/1'/0']tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB/0/*)#06sjusfa",
    "timestamp": "now",
    "active": true,
    "internal": false,
    "range": [
      0,
      999
    ],
    "next": 0
  }
]

I have copied this format from listdescriptors output for a new descriptor wallet that had private keys enabled.

5. Import this descriptor in wallet we created in step 3:

bitcoin-cli -rpcwallet=taproot_wallet importdescriptors "$(cat descriptor.txt)"

6. This is a watch only wallet with a taproot descriptor TPUB that can be used to create new bech32m address:

bitcoin-cli -rpcwallet=taproot_wallet getnewaddress "" "bech32m"

tb1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqp3mvzv

7. Send some bitcoin from another wallet:

https://blockstream.info/testnet/tx/2035ead4a9d0c8e2da1184924abc9034d26f2a7093371183ef12891623b235d1

I had compiled bitcoind with branch used by Sjors Provoost in PR #2260

Steps that I followed to do a transaction which creates a P2TR output:

1. Copy XPUB from test vectors mentioned in BIP 86

xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ

2. Convert XPUB (mainnet) to TPUB (testnet) using Bitcoin Extended Public Key Converter

tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB

3. Create a blank descriptor wallet with private keys disabled:

bitcoin-cli -named createwallet wallet_name=taproot_wallet blank=true disable_private_keys=true

4. Save the descriptor info in a text file for TPUB we got from step 2 (descriptor.txt):

[
  {
    "desc": "tr([8868ab13/86'/1'/0']tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB/0/*)#06sjusfa",
    "timestamp": "now",
    "active": true,
    "internal": false,
    "range": [
      0,
      999
    ],
    "next": 0
  }
]

I have copied this format from listdescriptors output for a new descriptor wallet that had private keys enabled.

5. Import this descriptor in wallet we created in step 3:

bitcoin-cli -rpcwallet=taproot_wallet importdescriptors "$(descriptor.txt)"

6. This is a watch only wallet with a taproot descriptor TPUB that can be used to create new bech32m address:

bitcoin-cli -rpcwallet=taproot_wallet getnewaddress

tb1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqp3mvzv

7. Send some bitcoin from another wallet:

https://blockstream.info/testnet/tx/2035ead4a9d0c8e2da1184924abc9034d26f2a7093371183ef12891623b235d1

I had compiled bitcoind with branch used by Sjors Provoost in PR #2260

Steps that I followed to do a transaction which creates a P2TR output:

1. Copy XPUB from test vectors mentioned in BIP 86

xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ

2. Convert XPUB (mainnet) to TPUB (testnet) using Bitcoin Extended Public Key Converter

tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB

3. Create a blank descriptor wallet with private keys disabled:

bitcoin-cli -named createwallet wallet_name=taproot_wallet blank=true disable_private_keys=true descriptors=true

4. Save the descriptor info in a text file for TPUB we got from step 2 (descriptor.txt):

[
  {
    "desc": "tr([8868ab13/86'/1'/0']tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB/0/*)#06sjusfa",
    "timestamp": "now",
    "active": true,
    "internal": false,
    "range": [
      0,
      999
    ],
    "next": 0
  }
]

I have copied this format from listdescriptors output for a new descriptor wallet that had private keys enabled.

5. Import this descriptor in wallet we created in step 3:

bitcoin-cli -rpcwallet=taproot_wallet importdescriptors "$(cat descriptor.txt)"

6. This is a watch only wallet with a taproot descriptor TPUB that can be used to create new bech32m address:

bitcoin-cli -rpcwallet=taproot_wallet getnewaddress

tb1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqp3mvzv

7. Send some bitcoin from another wallet:

https://blockstream.info/testnet/tx/2035ead4a9d0c8e2da1184924abc9034d26f2a7093371183ef12891623b235d1

I had compiled bitcoind with branch used by Sjors Provoost in PR #2260

Steps that I followed to do a transaction which creates a P2TR output:

1. Copy XPUB from test vectors mentioned in BIP 86

xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ

2. Convert XPUB (mainnet) to TPUB (testnet) using Bitcoin Extended Public Key Converter

tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB

3. Create a blank descriptor wallet with private keys disabled:

bitcoin-cli -named createwallet wallet_name=taproot_wallet blank=true disable_private_keys=true

4. Save the descriptor info in a text file for TPUB we got from step 2 (descriptor.txt):

[
  {
    "desc": "tr([8868ab13/86'/1'/0']tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB/0/*)#06sjusfa",
    "timestamp": "now",
    "active": true,
    "internal": false,
    "range": [
      0,
      999
    ],
    "next": 0
  }
]

I have copied this format from listdescriptors output for a new descriptor wallet that had private keys enabled.

5. Import this descriptor in wallet we created in step 3:

bitcoin-cli -rpcwallet=taproot_wallet importdescriptors "$(descriptor.txt)"

6. This is a watch only wallet with a taproot descriptor TPUB that can be used to create new bech32m address:

bitcoin-cli -rpcwallet=taproot_wallet getnewaddress

tb1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqp3mvzv

7. Send some bitcoin from another wallet:

https://blockstream.info/testnet/tx/2035ead4a9d0c8e2da1184924abc9034d26f2a7093371183ef12891623b235d1

I had compiled bitcoind with branch used by Sjors Provoost in PR #2260

Steps that I followed to do a transaction which creates a P2TR output:

1. Copy XPUB from test vectors mentioned in BIP 86

xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ

2. Convert XPUB (mainnet) to TPUB (testnet) using Bitcoin Extended Public Key Converter

tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB

3. Create a blank descriptor wallet with private keys disabled:

bitcoin-cli -named createwallet wallet_name=taproot_wallet blank=true disable_private_keys=true

4. Save the descriptor info in a text file for TPUB we got from step 2 (descriptor.txt):

[
  {
    "desc": "tr([8868ab13/86'/1'/0']tpubDC3pD7UZXnsgh3EBjbtBQiB1FnLask7UHBSunZ1DPK4dCFFZoFRkgxHB8gt42FvLzx1DpxfHWxAsYaY6b643RVcGjDxXxns7wKKYnnfEcbB/0/*)#06sjusfa",
    "timestamp": "now",
    "active": true,
    "internal": false,
    "range": [
      0,
      999
    ],
    "next": 0
  }
]

I have copied this format from listdescriptors output for a new descriptor wallet that had private keys enabled.

5. Import this descriptor in wallet we created in step 3:

bitcoin-cli -rpcwallet=taproot_wallet importdescriptors "$(descriptor.txt)"

6. This is a watch only wallet with a taproot descriptor TPUB that can be used to create new bech32m address:

bitcoin-cli -rpcwallet=taproot_wallet getnewaddress

tb1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqp3mvzv

7. Send some bitcoin from another wallet:

https://blockstream.info/testnet/tx/2035ead4a9d0c8e2da1184924abc9034d26f2a7093371183ef12891623b235d1

I had compiled bitcoind with branch used by Sjors Provoost in PR #2260