Juan Civile

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software development bitcoin wallet self-custodial wallet lightning network instant payments multisig 2-of-2 multi-signature mempool-based fee estimator low transaction fees recovery code emergency kit secure storage cold storage hot storage off-chain transactions on-chain transactions mobile wallet android ios compatibility private keys backup system enhanced security transaction confirmation cryptocurrency payments fee efficiency user experience financial sovereignty non-custodial wallet digital assets crypto custody dual key system 2-layered backup scan & pay transaction management privacy features payment channels self-custody auditability fee estimation open-source model bitcoin core integration rapid recovery options decentralized finance secure fund transfer taproot compatibility code written recovery financial technology bitcoin security standards innovative wallet design cryptographic protocols information technology & services ux finance technology financial services