Schnorr Tool

A helper command-line tool for Bitcoin's Elliptic-Curve cryptography and Schnorr signatures.

Usage

git clone https://github.com/craigwrong/schnorr-tool
cd schnorr-tool
swift run schnorr-tool --help

Usage in combination with LibBitcoin Explorer (bx)

For this example we will be using these Test vectors.

Seed and extended keys.

bx mnemonic-to-seed abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about
# 5eb00bbddcf069084889a8ab9155568165f5c453ccb85e70811aaed6f6da5fc19a5ac40b389cd370d086206dec8aa6c43daea6690f20ad3d8d48b2d2ce9e38e4

bx hd-new 5eb00bbddcf069084889a8ab9155568165f5c453ccb85e70811aaed6f6da5fc19a5ac40b389cd370d086206dec8aa6c43daea6690f20ad3d8d48b2d2ce9e38e4
# xprv9s21ZrQH143K3GJpoapnV8SFfukcVBSfeCficPSGfubmSFDxo1kuHnLisriDvSnRRuL2Qrg5ggqHKNVpxR86QEC8w35uxmGoggxtQTPvfUu

bx hd-to-public xprv9s21ZrQH143K3GJpoapnV8SFfukcVBSfeCficPSGfubmSFDxo1kuHnLisriDvSnRRuL2Qrg5ggqHKNVpxR86QEC8w35uxmGoggxtQTPvfUu
# xpub661MyMwAqRbcFkPHucMnrGNzDwb6teAX1RbKQmqtEF8kK3Z7LZ59qafCjB9eCRLiTVG3uxBxgKvRgbubRhqSKXnGGb1aoaqLrpMBDrVxga8

Key fingerprint (for descriptor origin information).

bx base58-decode xpub661MyMwAqRbcFkPHucMnrGNzDwb6teAX1RbKQmqtEF8kK3Z7LZ59qafCjB9eCRLiTVG3uxBxgKvRgbubRhqSKXnGGb1aoaqLrpMBDrVxga8
# 0488b21e0000000000000000007923408dadd3c7b56eed15567707ae5e5dca089de972e07f3b860450e2a3b70e03d902f35f560e0470c63313c7369168d9d7df2d49bf295fd9fb7cb109ccee0494c7fe61f5

bx bitcoin160 0488b21e0000000000000000007923408dadd3c7b56eed15567707ae5e5dca089de972e07f3b860450e2a3b70e03d902f35f560e0470c63313c7369168d9d7df2d49bf295fd9fb7cb109ccee0494c7fe61f5
# ed493b8354c1766c6b0a55c906d34582818baa8b

echo ed493b8354c1766c6b0a55c906d34582818baa8b | cut -c 1-8
# ed493b83

Account keys for path m/86'/0'/0'.

bx hd-private -d -i 86 xprv9s21ZrQH143K3GJpoapnV8SFfukcVBSfeCficPSGfubmSFDxo1kuHnLisriDvSnRRuL2Qrg5ggqHKNVpxR86QEC8w35uxmGoggxtQTPvfUu
# xprv9ukW2Usuz4vBKZJxKfMUwtjtSTD2U4QxW1ue4prK5TYzYM3voo8EEyUPsyYHvHP8jvj9w4Xr6SAdpEGEDVfpQm8q1puVtRTUidX4mgrouHH

bx hd-private -d -i 0 xprv9ukW2Usuz4vBKZJxKfMUwtjtSTD2U4QxW1ue4prK5TYzYM3voo8EEyUPsyYHvHP8jvj9w4Xr6SAdpEGEDVfpQm8q1puVtRTUidX4mgrouHH
# xprv9wMkdjRwYptb4FzqvUNxxehWWywVtgVvrV5X9BKb16bugM5eQJdHLG7dVF3W1r1KkkSHN3s3txMNMEcisTRLK2ogyU4mek8eAPfXkfUqhhG

bx hd-private -d -i 0 xprv9wMkdjRwYptb4FzqvUNxxehWWywVtgVvrV5X9BKb16bugM5eQJdHLG7dVF3W1r1KkkSHN3s3txMNMEcisTRLK2ogyU4mek8eAPfXkfUqhhG
# xprv9xgqHN7yz9MwCkxsBPN5qetuNdQSUttZNKw1dcYTV4mkaAFiBVGQziHs3NRSWMkCzvgjEe3n9xV8oYywvM8at9yRqyaZVz6TYYhX98VjsUk

bx hd-to-public xprv9xgqHN7yz9MwCkxsBPN5qetuNdQSUttZNKw1dcYTV4mkaAFiBVGQziHs3NRSWMkCzvgjEe3n9xV8oYywvM8at9yRqyaZVz6TYYhX98VjsUk
# xpub6BgBgsespWvERF3LHQu6CnqdvfEvtMcQjYrcRzx53QJjSxarj2afYWcLteoGVky7D3UKDP9QyrLprQ3VCECoY49yfdDEHGCtMMj92pReUsQ

Account 0, first receiving address for path m/86'/0'/0'/0/0.

bx hd-private -i 0 xprv9xgqHN7yz9MwCkxsBPN5qetuNdQSUttZNKw1dcYTV4mkaAFiBVGQziHs3NRSWMkCzvgjEe3n9xV8oYywvM8at9yRqyaZVz6TYYhX98VjsUk
# xprvA1n4fAv8WWZbfAECqqZsPxRCCaBUqLXF9VdqK1RMAhcyyAoM3fGx6ytPfVrTHMhqLqGLJP4pgLBsQKYb53tnM3vSDPS6U756uWfrF2TpcXS

bx hd-private -i 0 xprvA1n4fAv8WWZbfAECqqZsPxRCCaBUqLXF9VdqK1RMAhcyyAoM3fGx6ytPfVrTHMhqLqGLJP4pgLBsQKYb53tnM3vSDPS6U756uWfrF2TpcXS
# xprvA449goEeU9okwCzzZaxiy475EQGQzBkc65su82nXEvcwzfSskb2hAt2WymrjyRL6kpbVTGL3cKtp9herYXSjjQ1j4stsXXiRF7kXkCacK3T

bx hd-to-public xprvA449goEeU9okwCzzZaxiy475EQGQzBkc65su82nXEvcwzfSskb2hAt2WymrjyRL6kpbVTGL3cKtp9herYXSjjQ1j4stsXXiRF7kXkCacK3T
# xpub6H3W6JmYJXN49h5TfcVjLC3onS6uPeUTTJoVvRC8oG9vsTn2J8LwigLzq5tHbrwAzH9DGo6ThGUdWsqce8dGfwHVBxSbixjDADGGdzF7t2B

Schnorr-specific keys (schnorr-tool).

bx hd-to-ec xprvA449goEeU9okwCzzZaxiy475EQGQzBkc65su82nXEvcwzfSskb2hAt2WymrjyRL6kpbVTGL3cKtp9herYXSjjQ1j4stsXXiRF7kXkCacK3T
# 41f41d69260df4cf277826a9b65a3717e4eeddbeedf637f212ca096576479361

schnorr-tool internal-key 41f41d69260df4cf277826a9b65a3717e4eeddbeedf637f212ca096576479361
# cc8a4bc64d897bddc5fbc2f670f7a8ba0b386779106cf1223c6fc5d7cd6fc115

schnorr-tool tweak cc8a4bc64d897bddc5fbc2f670f7a8ba0b386779106cf1223c6fc5d7cd6fc115
# 2ca01ed85cf6b6526f73d39a1111cd80333bfdc00ce98992859848a90a6f0258

schnorr-tool output-key cc8a4bc64d897bddc5fbc2f670f7a8ba0b386779106cf1223c6fc5d7cd6fc115 2ca01ed85cf6b6526f73d39a1111cd80333bfdc00ce98992859848a90a6f0258
# a60869f0dbcf1dc659c9cecbaf8050135ea9e8cdc487053f1dc6880949dc684c

scriptPubKey and Bech32m address.

schnorr-tool output-script a60869f0dbcf1dc659c9cecbaf8050135ea9e8cdc487053f1dc6880949dc684c
5120a60869f0dbcf1dc659c9cecbaf8050135ea9e8cdc487053f1dc6880949dc684c

schnorr-tool address a60869f0dbcf1dc659c9cecbaf8050135ea9e8cdc487053f1dc6880949dc684c      
bc1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqkedrcr