--- Log opened Sat Dec 31 00:00:01 2022
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00:37 < PaperSword> Why does 0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140 and 0x0000000000000000000000000000000000000000000000000000000000000001 generate the same public key under SECP256K1? both of those values exist at the end of the valid input range for the function. 
01:13 < real_or_random> PaperSword you mean *xonly* pubkey?
01:14 < real_or_random> elliptic curves such as secp256k1 are cyclic groups. so the input is taken modulo the group order, which is 0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140.... your first value is -1 mod the group order and 1 is 1 mod the group order.
01:17 < real_or_random> So these generate different elliptic curve points P1 = -G and and P2 = G, where G is the generator. Since P1 = -P2, that means that P1 and P2 happen to have the same x-coordinate but their y-coordinate add up to 0 and have different signs. (You negate a point simply by negating its y-coordinate.)   
01:18 < real_or_random> If you look at the *xonly* pubkeys (which have only the x-coordinate), then yes, those two generate the same pubkey 
01:19 < PaperSword> Correct xonly
01:19 < PaperSword> Thanks so much for the explanation
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04:38 < bitcoin-git> [bitcoin] furszy opened pull request #26780: rpc: simplify scan blocks (master...2022_simplify_scan_blocks) https://github.com/bitcoin/bitcoin/pull/26780
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04:44 < bitcoin-git> [bitcoin] MarcoFalke pushed 2 commits to master: https://github.com/bitcoin/bitcoin/compare/65de8eeeca29...8575d5d84265
04:44 < bitcoin-git> bitcoin/master 090ad51 Joshua Kelly: rpc: Remove duplicate field in RPCHelpMan for gettransactions
04:44 < bitcoin-git> bitcoin/master 8575d5d MarcoFalke: Merge bitcoin/bitcoin#26777: rpc: Remove duplicate field in RPCHelpMan for...
04:44 < bitcoin-git> [bitcoin] MarcoFalke merged pull request #26777: rpc: Remove duplicate field in RPCHelpMan for gettransactions (master...rpc/get-transactions-typo) https://github.com/bitcoin/bitcoin/pull/26777
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07:38 < bitcoin-git> [bitcoin] hebasto opened pull request #26781: Release `LockData::dd_mutex` before calling `*_detected` functions (master...221231-lock) https://github.com/bitcoin/bitcoin/pull/26781
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10:25 < bitcoin-git> [bitcoin] andrewtoth opened pull request #26782: p2p: cache block hash in ProcessGetBlockData and CMPCTBLOCK processing (master...cache-block-header-hash) https://github.com/bitcoin/bitcoin/pull/26782
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11:58 < bitcoin-git> [bitcoin] SmashedFrenzy16 opened pull request #26784: Update key_io.cpp (master...patch-1) https://github.com/bitcoin/bitcoin/pull/26784
12:11 < bitcoin-git> [bitcoin] hebasto closed pull request #26784: Update key_io.cpp (master...patch-1) https://github.com/bitcoin/bitcoin/pull/26784
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12:47 < bitcoin-git> [bitcoin] CodeMaster7000 opened pull request #26785: Update README.md to improve grammar (master...patch-1) https://github.com/bitcoin/bitcoin/pull/26785
12:58 < bitcoin-git> [bitcoin] andrewtoth closed pull request #26782: p2p: cache block hash in ProcessGetBlockData and CMPCTBLOCK processing (master...cache-block-header-hash) https://github.com/bitcoin/bitcoin/pull/26782
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18:23 < bitcoin-git> [bitcoin] fanquake closed pull request #26785: Update README.md to improve grammar (master...patch-1) https://github.com/bitcoin/bitcoin/pull/26785
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22:26 < bitcoin-git> [bitcoin] Bhaney44 opened pull request #26787: Update build-osx.md (master...master) https://github.com/bitcoin/bitcoin/pull/26787
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--- Log closed Sun Jan 01 00:00:02 2023