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pezkuwichain
6239526d43
RealBitcoinTransactionService builds and signs native SegWit transactions client-side (mempool.space only exposes UTXOs/fee-rate/broadcast, not construction, unlike TronGrid): greedy largest-first UTXO selection over confirmed UTXOs, inputs*68 + outputs*31 + 11 vsize heuristic for fees (matching pezkuwi-exchange's proven approach), RBF-signaled inputs, and a 546-sat dust threshold that folds sub-dust change into the fee rather than creating an uneconomical output. Each input gets its own BIP143 sighash, signed via the existing raw-hash signing primitive (NovaSigner.signRaw with skipMessageHashing) already used for Ethereum/Tron, then DER-encoded with low-S normalization - no new signing call path was added, only the DER encoding step. Also fixes multiChainEncryptionFor/getMetaAccountKeypair to recognize Bitcoin accounts: previously neither function had any Bitcoin (or Tron) branch, so signing would have silently used the wrong keypair. Threads a bitcoin flag through mapMetaAccountSecretsToKeypair/DerivationPath and AccountSecrets.keypair(chain)/derivationPath(chain) the same way ethereum already is.