[security] [bug/help] I can not verify self-custody-vault Taproot Address with this repo's code

Summary of Bug

I use babylon\btcstaking\staking_testvectors_test.go with modified file "testvectors\vectors.json" to verify on-chain StakingOutputPkScript and StakingOutputAddress(taproot address). However, all failed with a few choosed on-chain (signet) stakings. I just can not reproduce the exactly on-chain taproot StakingOutputAddress by offering the same parameters( staker pubkey, FP , covenant pubkeys, covenant quorum, staking time). And, then, I am not sure if some malicious script path is hidden in the taproot address.

Version

repo: https://github.com/babylonchain/babylon.git remote branch: origin/dev HEAD: 6dbcf44b79511873aa3840de0b3c1dc8d1b78372 (git clone yestoday)

Steps to Reproduce

modify babylon\btcstaking\types.go (just add log): in function BuildStakingInfo, add:

taprootPkScript, err := sh.taprootPkScript(net)
//begin add
fmt.Println("[My-Verify]: taprootPkScript:", hex.EncodeToString(taprootPkScript))
taprootAddress, err := sh.my_taprootAddress(net)
fmt.Println("[My-Verify]: taprootAddress:", taprootAddress)
//end add

modify babylon\btcstaking\testvectors\vectors.json add a new testcase with parameters I got from babylon website and api, details is : I open "https://[api.babylonchain.io/v2/btc-delegations?pagination.key=&pagination.reverse=true&pagination.limit=100](https://api.babylonchain.io/v2/btc-delegations?pagination.key=&pagination.reverse=true&pagination.limit=100)" and choose one staking as test. as below: { "delegation": { "btc_pk_hex": "37781a858ff4f5b864576d38722dde1f4e5e377cb1b132672da9db9322635386", "staking_amount": 44800, "start_height": 195515, "end_height": 196523, "bbn_pk": { "hex": "035dd47f21291fcbcc9ea74fe3ae12497aa892a60f8bb2f5ed6dd203337ff87a36", "acc_addr": "bbn1tcj49av2xncfa8pl57ua4azfqrxv7m6wjf96ea" } }, "finality_providers": [ { "description": { "moniker": "Babylon Foundation 3", "website": "https://babylonchain.io" }, "commission": "0.050000000000000000", "bbn_pk": { "hex": "03e990c3d05d8b34d6c4d1082a035f971b7b9d0910a686238b0942fe3ca6f2115f", "acc_addr": "bbn1t3gu0t7hysvcmneu0rk6epqvu53epw3d39jcx4" }, "btc_pk_hex": "977a2d15c19bd1bfa32bcd4fad70733e1189dffac65d3aee60067e59f0f3df30" } ], "status": { "status": "Active", "status_time": "0001-01-01T00:00:00Z" }, "activation_time": "0001-01-01T00:00:00Z", "staking_tx_hex": "020000000001010af4be395dd258153c9ad59f07d6b431ed0907430791283b8b16ac9215ae1e7a0000000000ffffffff0200af0000000000002251203d9b0c9affb576190f9a113c2d42479a6c18bd928999a5e70c7735de9b746fe99b8d0e00000000001600147b12ba8dce7bf45e7c8324726a8adcc4c6e5bd8a02483045022100aae0fa5f2716156f5f389c9c2414062fe8453c55e6312a0c4923aed9dda1c23f022068558e312b03890a4892af51d1fbc915ded4bd3b17bb4dc65fb56029dc3d9f9901210237781a858ff4f5b864576d38722dde1f4e5e377cb1b132672da9db932263538600000000", "staking_output_idx": 0, "slashing_tx_hex": "020000000165158a94797b40b49734d7780d6e51635456d50ae794ff6d39f577af97b872e20000000000ffffffff02801100000000000016001463e2edfae6bf51aebbed63bb823c55565ab5eace9899000000000000225120f0a6d11cdb6793ba8b450108348a1471cc27f0633df28e4a15eae4fed27fb23300000000", "unbonding_tx_hex": "020000000165158a94797b40b49734d7780d6e51635456d50ae794ff6d39f577af97b872e20000000000ffffffff0118ab000000000000225120160f85b09c35ab474a94b5e8a44f2f96419060c8ea647f88f612b49da0317d9100000000", "unbonding_tx_sig_hex": "", "unbonding_slashing_tx_hex": "0200000001198f309e3d6839823cfe1e4d28f0e7a680221a1bba03942c8067d36d9acf17f90000000000ffffffff021c1100000000000016001463e2edfae6bf51aebbed63bb823c55565ab5eace1496000000000000225120f0a6d11cdb6793ba8b450108348a1471cc27f0633df28e4a15eae4fed27fb23300000000", "covenant_unbonding_sigs": [ { "btc_pk_hex": "59d3532148a597a2d05c0395bf5f7176044b1cd312f37701a9b4d0aad70bc5a4", "sig_hex": "89c67943a1bf0cbd7c18152d86674cbb062125eba3effeeb6d4e640427cab79f93022568caf500e537019397aea744bcc1279846a546776186ad63c2756cd056" }, { "btc_pk_hex": "a5c60c2188e833d39d0fa798ab3f69aa12ed3dd2f3bad659effa252782de3c31", "sig_hex": "3e0bed68cae48c2318ac88303a6517f5a351c0b827f1279b772a4b1ff536d0d9cc46e89af695dab8c6f9a4aa3c4e5f1b1bbe288b7904d4c4258223e389ec13f6" }, { "btc_pk_hex": "57349e985e742d5131e1e2b227b5170f6350ac2e2feb72254fcc25b3cee21a18", "sig_hex": "9857ba1833b5dbae846c63c979b9cdca5500ee775128ef08a4e260110cdd1f7e8cc458c0b35cb51f3b0d95682d967b5b8c4761b2206af364b5745f83942c3078" } ] },

by the tool (https#//www.blockchain.com/explorer/assets/btc/decode-transaction) ,I decode the staking_tx_hex field to get txid(signet) is e272b897af77f5396dff94e70ad5565463516e0d78d73497b4407b79948a1565, then I query the txid on mempool.space(https#//mempool.space/signet/tx/e272b897af77f5396dff94e70ad5565463516e0d78d73497b4407b79948a1565), I now know the expected stakingoutputPKscript is 51203d9b0c9affb576190f9a113c2d42479a6c18bd928999a5e70c7735de9b746fe9 and the expected stakingouputaddress is tb1p8kdsexhlk4mpjru6zy7z6sj8nfkp30vj3xv6tecvwu6aaxm5dl5skfllzm (taproot).

with the same txid, I get sender(staker) 's pubkey on the witness field which is 0237781a858ff4f5b864576d38722dde1f4e5e377cb1b132672da9db9322635386 on mempool.

for vectors.json,

set staker_public_key with 0237781a858ff4f5b864576d38722dde1f4e5e377cb1b132672da9db9322635386 , set finality_provider_public_keys with data fetched from btc-delegations api query. set covenant_public_keys with data fetched from btc-delegations api query. set covenant_quorum with 2 ( I also tried 1 , 3 for the total number is 3) set staking_time with 1008 ( end_height- start_height) (btw, 1008 = 10080 mins = 168 hours = 7 days) set network = signet save vectors.json !

run "go test -v .\btcstaking\staking_testvectors_test.go "
I got different script pubkey and different taproot address which is not expected.

(I also tried other parameters , like :https://[staking-api.testnet.babylonchain.io/v1/global-params](https://staking-api.testnet.babylonchain.io/v1/global-params) ; https://[staking-api.babylonlabs.io/v1/global-params](https://staking-api.babylonlabs.io/v1/global-params), all failed to test/verify stakingoutput address)

babylonchain / babylon