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Daniel Granhão

PROFILE

Daniel Granhão

Daniel Granhaõ developed and maintained core features for the Breez SDK ecosystem, focusing on backend reliability, blockchain integration, and developer experience. Working across repositories such as breez-sdk-liquid and spark-sdk, he implemented robust fee management workflows, unified input parsing, and enhanced event-driven synchronization for Bitcoin and Liquid networks. His technical approach emphasized modular Rust and Go code, leveraging asynchronous programming, Docker-based local testing, and detailed logging to improve observability and maintainability. Daniel’s work addressed configuration complexity, data integrity, and release reliability, resulting in streamlined onboarding, reduced integration friction, and more resilient payment and swap operations for partner developers.

Overall Statistics

Feature vs Bugs

77%Features

Repository Contributions

62Total
Bugs
6
Commits
62
Features
20
Lines of code
9,086
Activity Months9

Work History

October 2025

7 Commits • 2 Features

Oct 1, 2025

Monthly performance summary for 2025-10: Focused on stable release delivery, documentation quality, and data correctness to accelerate partner integrations and reduce post-release support. Key features delivered: - breez/breez-sdk-liquid: Released version 0.11.7 with configuration and lock-file alignment; two commits completed the bump (cd5e5bd... for 0.11.6 and 0c6862cd... for 0.11.7). This establishes a repeatable release baseline and reduces integration churn for downstream clients. - breez/spark-sdk: Documentation improvements for token payments and terminology, including clarified token handling, supported input types for parsing, and consistency in naming (Spark capitalization; Bitcoin vs. satoshi). Commits include c32b66f..., f8ac2d52..., de33f738..., 9fe6d659... reflecting comprehensive doc governance. Major bugs fixed: - breez/spark-sdk: Fixed serialization for amount/fee fields in payment preparation by introducing serde_u128_as_string to correctly handle u128 values; followed up with a fix for the common "Amount is required" error (commit 0e6a4985...). This mitigates runtime payment prep failures and improves data integrity. Overall impact and accomplishments: - Release reliability improved across SDKs; reduced post-release support costs and onboarding friction for partners. - Data correctness in payments enhanced, enabling smoother integrations and fewer transaction errors. - Documentation quality improvements support faster developer onboarding and consistent terminology across products. Technologies/skills demonstrated: - Release engineering and configuration management (version bumps, multi-repo coordination). - Rust-specific data handling and serialization (serde_u128_as_string for u128). - Documentation governance and terminology standardization (token payments, input types, capitalization). - Cross-repo collaboration to align features and fixes with business goals.

August 2025

1 Commits • 1 Features

Aug 1, 2025

August 2025 monthly summary for breez/spark-sdk focused on reliability improvements in event-driven transfer processing. The primary work delivered a feature enhancement to ensure pending transfers are claimed upon reconnection to the event stream, strengthening correctness and resilience of transfer processing across reconnections. This release also improved observability through logging and event formatting, and refactored background processing to trigger claim operations as soon as the event stream becomes available.

July 2025

10 Commits • 3 Features

Jul 1, 2025

July 2025 performance summary: Key reliability and configurability enhancements across Breez SDKs. Fixed a critical bug in breez/spark-sdk's prepare_claim_leaf_key_tweaks to guarantee a valid proof is returned or an error is raised, simplifying proof_map insertion (commit 1b225244d5fb2a1a478af41660eb7565f8fe102f). Added environment variable support for Spark CLI via dotenv (dotenvy), enabling startup loading of config from env vars (commit 2d7aea05210a2aa7509f1adfc34e5702352a5379). In breez/breez-sdk-liquid, released a set of Bitcoin Tips and Chain Swap Synchronization Enhancements that optimize tip fetch, conditionally process tips when chain swaps are monitored, improve error handling, and introduce get_sync_context and better logging (commits 012a318ee64d78c4da31c80b78d8dd8120641442, 814d0922234dfd4da189ec9a1398f77d7e2fb876, c0cba7f557b6806fe3faffdfd36abc981d57e09e, f72ec856586ce50f5b17cba366e66bd68c261eaa, 77ed5a043ec259a0a71ea992e7487b8febeb9926, 9d74686c6772151bbc59bbe03c481d0f2edb9670, bdd639c86155a74be2ca6a00dc33a60504d53764). Also incremented release version from 0.10.2 to 0.10.3 (commit 152d9a66fca3768dbb43b295204ecbfcf163d8ba).

June 2025

3 Commits • 2 Features

Jun 1, 2025

June 2025 monthly summary focusing on delivering key features, fixing critical bugs, and strengthening the Breez SDK's testing and integration capabilities. Across breez-sdk-liquid, breez-sdk-greenlight, and breez-sdk-liquid-docs, the team delivered local testing enhancements, improved swap proxy integration, and configuration reliability—driving faster feature validation, higher integration quality, and stronger business value for developers and end-users.

April 2025

2 Commits • 1 Features

Apr 1, 2025

Monthly summary for 2025-04 focusing on Breez SDK Liquid improvements. Delivered unified Esplora backend for chain exploration across all networks, improving reliability and reducing configuration complexity. Changes are well-aligned with product goals and developer experience. Two commits set default Esplora/Watefalls backend as the default for chain exploration.

February 2025

2 Commits • 2 Features

Feb 1, 2025

February 2025 (breez/breez-sdk-liquid) delivered two key improvements focused on observability and configuration ergonomics. Enhanced push synchronization observability enables faster debugging and issue reproduction, while SDK configuration simplification reduces setup complexity for integrators. No explicit major bug fixes were reported in this period. These changes improve maintainability, reduce debugging time, and accelerate downstream integration, delivering measurable business value in reliability and developer efficiency.

January 2025

12 Commits • 5 Features

Jan 1, 2025

January 2025 performance summary for breez-sdk work across breez-sdk-liquid and breez-sdk-greenlight. Focused on fee workflow, swap reliability, data integrity, and cross-module refactoring to improve business value and developer experience. Delivered a unified fee review experience, corrected swap fee calculations, enriched data models for synchronized swaps, and consolidated parsing logic with a versioned schema update; greenlight gained BOLT12 offers parsing.

December 2024

24 Commits • 3 Features

Dec 1, 2024

December 2024 monthly performance summary for Breez SDK efforts across breez-sdk-greenlight and breez-sdk-liquid. Delivered major enhancements to external input handling, enhanced configurability, and a robust chain swap fee workflow, along with documentation improvements and targeted bug fixes to improve reliability and developer experience.

November 2024

1 Commits • 1 Features

Nov 1, 2024

Month 2024-11: Breez SDK Greenlight delivered a focused documentation update for on-chain receive operations to reduce integration ambiguity and improve developer onboarding. The update clarifies enforcement of opening fee parameters and the validity requirements for swap redemption within the receive_onchain flow, aligned with the SDK’s on-chain workflows.

Activity

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Quality Metrics

Correctness91.4%
Maintainability91.0%
Architecture89.6%
Performance86.8%
AI Usage21.6%

Skills & Technologies

Programming Languages

CC++DartDockerfileGoGradleKotlinMarkdownObjective-CRuby

Technical Skills

API DesignAPI IntegrationAsynchronous ProgrammingBOLT12Backend DevelopmentBackend IntegrationBindingsBitcoinBlockchainBlockchain IntegrationBlockchain SynchronizationBuild ManagementBuild System ManagementCCI/CD

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

breez/breez-sdk-liquid

Dec 2024 Oct 2025
7 Months active

Languages Used

CDartKotlinRustSQLSwiftTOMLTypeScript

Technical Skills

API DesignAPI IntegrationBackend DevelopmentBitcoinBlockchainBlockchain Integration

breez/breez-sdk-greenlight

Nov 2024 Jun 2025
4 Months active

Languages Used

RustGo

Technical Skills

DocumentationSDK DevelopmentAPI DesignAPI IntegrationCode RefactoringError Handling

breez/spark-sdk

Jul 2025 Oct 2025
3 Months active

Languages Used

RustMarkdown

Technical Skills

Backend DevelopmentDependency ManagementEnvironment VariablesError HandlingRustAsynchronous Programming

breez/breez-sdk-liquid-docs

Jun 2025 Jun 2025
1 Month active

Languages Used

Dart

Technical Skills

Object-Oriented ProgrammingSDK Development

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