DFXswiss/api
Nov 2024 – Dec 2025
14 Months active
Languages Used
ShellTypeScriptJavaScriptBicepDockerfileGoJavaPython
Technical Skills
Backend DevelopmentDevOpsDockerError HandlingInfrastructure ManagementLogging
bernd2022
PROFILE
Bernd2022
Bernd contributed to the DFXswiss/api repository by engineering robust backend features and infrastructure for cross-chain payments, liquidity, and deployment automation. Over 14 months, he delivered Cardano DEX liquidity strategies, enhanced Solana and Tron transaction handling, and improved webhook reliability, focusing on correctness and operational safety. His work leveraged TypeScript and Node.js for backend logic, Bicep for infrastructure as code, and Docker for containerization, enabling scalable deployments and environment parity. Bernd addressed edge cases in asset handling, fee modeling, and configuration management, demonstrating depth in blockchain integration and cloud automation while reducing operational risk and supporting rapid, reliable production releases.
Overall Statistics
Feature vs Bugs
82%Features
Repository Contributions
91Total
Bugs
10
Commits
91
Features
45
Lines of code
4,522
Activity Months14
Your Network
5 people
Work History
December 2025
6 Commits • 3 Features
Dec 1, 2025Month: 2025-12 — DFXswiss/api Key features delivered: - Cardano DEX liquidity strategies added to the DEX module to support Cardano assets, enabling efficient liquidity provisioning for Cardano pairs. Commit: e91351e9a9b02c45791f13c617f252097575306c. - Cardano transaction processing improvements in CardanoClient: improved confirmation detection and history mapping for more reliable processing, with deposit-address related transaction filtering. Commits: 374d2fd1633bb1f23e6e6b2573286562021772af; 87cca29ac2e48e210f4b2eb5f5d63346a1384988. - Cardano minimum sendable amount and flexible fee handling: enforces a minimum 1 ADA sendable and supports token-specific scenarios to ensure reliable fees. Commits: 1f555cb4bf50bcfe0b55e326b79e913f401ca7ed; cfa8582dae7da9556b85aafed9e98a495183de37. Major bugs fixed: - Deposit address generation safety: prevented creating deposit addresses for index 0 on Zano and Cardano to avoid invalid addresses and improve deposit flow. Commit: 5b014b461c65868482babbc21645b4e987d4dfe3. Overall impact and accomplishments: - Strengthened Cardano capabilities across the DEX and wallet flows, improving reliability for Cardano asset trading, deposits, and fee handling. - Reduced user-friction risks and improved cross-chain liquidity usability, enabling scalable growth of Cardano assets within the platform. - Maintained clear traceability to DEV-4468 initiatives and index-safety hardening (NO-TASK) across changes. Technologies/skills demonstrated: - CardanoClient enhancements, DEX module integration, deposit-flow safety hardening, and robust fee logic. - Emphasis on edge-case handling, validation, and operational reliability for cross-chain transactions.
6 Commits • 3 Features
Dec 1, 2025Month: 2025-12 — DFXswiss/api Key features delivered: - Cardano DEX liquidity strategies added to the DEX module to support Cardano assets, enabling efficient liquidity provisioning for Cardano pairs. Commit: e91351e9a9b02c45791f13c617f252097575306c. - Cardano transaction processing improvements in CardanoClient: improved confirmation detection and history mapping for more reliable processing, with deposit-address related transaction filtering. Commits: 374d2fd1633bb1f23e6e6b2573286562021772af; 87cca29ac2e48e210f4b2eb5f5d63346a1384988. - Cardano minimum sendable amount and flexible fee handling: enforces a minimum 1 ADA sendable and supports token-specific scenarios to ensure reliable fees. Commits: 1f555cb4bf50bcfe0b55e326b79e913f401ca7ed; cfa8582dae7da9556b85aafed9e98a495183de37. Major bugs fixed: - Deposit address generation safety: prevented creating deposit addresses for index 0 on Zano and Cardano to avoid invalid addresses and improve deposit flow. Commit: 5b014b461c65868482babbc21645b4e987d4dfe3. Overall impact and accomplishments: - Strengthened Cardano capabilities across the DEX and wallet flows, improving reliability for Cardano asset trading, deposits, and fee handling. - Reduced user-friction risks and improved cross-chain liquidity usability, enabling scalable growth of Cardano assets within the platform. - Maintained clear traceability to DEV-4468 initiatives and index-safety hardening (NO-TASK) across changes. Technologies/skills demonstrated: - CardanoClient enhancements, DEX module integration, deposit-flow safety hardening, and robust fee logic. - Emphasis on edge-case handling, validation, and operational reliability for cross-chain transactions.
December 2025
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025: Delivered RealUnit Ponder Container Deployment Configuration for DFXswiss/api, introducing environment-specific deployment parameters for development, local, and production. Updated the deployment script to include the new RealUnit Ponder application option, enabling smoother, safer rollouts and improved environment parity. No major bugs fixed this month; focus was on delivering a robust deployment capability that accelerates release readiness and reduces manual steps.
November 2025
1 Commits • 1 Features
Nov 1, 2025November 2025: Delivered RealUnit Ponder Container Deployment Configuration for DFXswiss/api, introducing environment-specific deployment parameters for development, local, and production. Updated the deployment script to include the new RealUnit Ponder application option, enabling smoother, safer rollouts and improved environment parity. No major bugs fixed this month; focus was on delivering a robust deployment capability that accelerates release readiness and reduces manual steps.
October 2025
3 Commits • 2 Features
Oct 1, 2025October 2025: Delivered configuration and deployment automation improvements for DFXswiss/api, focusing on increased configurability and automated infrastructure. The changes enable environment-specific behavior, simplify future integrations, and accelerate reliable deployments of Azure Front Door with a VM, reducing manual effort and risk.
3 Commits • 2 Features
Oct 1, 2025October 2025: Delivered configuration and deployment automation improvements for DFXswiss/api, focusing on increased configurability and automated infrastructure. The changes enable environment-specific behavior, simplify future integrations, and accelerate reliable deployments of Azure Front Door with a VM, reducing manual effort and risk.
October 2025
September 2025
24 Commits • 14 Features
Sep 1, 2025In September 2025, the DFXSwiss/api work focused on stabilizing development workflows, accelerating production readiness, and expanding automation and observability. The team delivered environment configuration improvements, resource optimizations, and expanded container/app parameterization to support automated deployments and monitoring. These efforts reduced operational risk, lowered run costs, and enabled faster, more reliable PRD deployments while improving dev experience and automation coverage.
September 2025
24 Commits • 14 Features
Sep 1, 2025In September 2025, the DFXSwiss/api work focused on stabilizing development workflows, accelerating production readiness, and expanding automation and observability. The team delivered environment configuration improvements, resource optimizations, and expanded container/app parameterization to support automated deployments and monitoring. These efforts reduced operational risk, lowered run costs, and enabled faster, more reliable PRD deployments while improving dev experience and automation coverage.
August 2025
3 Commits • 1 Features
Aug 1, 2025Concise monthly summary for 2025-08 focusing on business value and technical achievements across the DFXswiss/api repo. Key features delivered, bugs fixed, and skills demonstrated with direct traceability to commits.
3 Commits • 1 Features
Aug 1, 2025Concise monthly summary for 2025-08 focusing on business value and technical achievements across the DFXswiss/api repo. Key features delivered, bugs fixed, and skills demonstrated with direct traceability to commits.
August 2025
July 2025
9 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for DFXswiss/api (2025-07). The development work centered on expanding reliability, asset coverage, and performance, delivering a set of features and fixes that enhance business value and transaction integrity across Solana and Tron integrations. Key features delivered: - Solana Signature Validation Robustness: Adapted Solana signature format regex to accommodate variations in length, improving validation reliability. - Pending Payments Expiration Timeout: Introduced conditional timeout for expiring pending payments to prevent excessively long pending states. - Tron Fee Calculation Across Asset Types: Extended Tron account creation fee calculation to COIN and TOKEN asset types and refactored logic for broader asset support. - Tron Client Initialization and Service Refactor: Refactored TronService to make the client readonly and extracted initialization logic; implemented lazy Tatum SDK initialization in TronClient. Major bugs fixed: - Tron Token Transfer Correctness and Fee Reporting: Fixed token transfer precision to only allow whole units, added validation for token decimals before sending, and ensured accurate retrieval of actual transaction fees on Tron. Overall impact and accomplishments: - Improved reliability and user trust through robust signature validation and safer pending payment handling. - Broader asset coverage and accurate fee accounting for Tron-driven operations, reducing edge-case errors and support overhead. - Cleaner service architecture and initialization patterns leading to more maintainable, testable code and faster feature delivery. Technologies/skills demonstrated: - Regex-based validation enhancements, feature flag/timeout patterns, and asset-type driven fee calculations. - Immutability and cleaner initialization (readonly clients, lazy SDK loading). - End-to-end impact assessment: lower error rates, improved correctness of token transfers and fee reporting.
July 2025
9 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for DFXswiss/api (2025-07). The development work centered on expanding reliability, asset coverage, and performance, delivering a set of features and fixes that enhance business value and transaction integrity across Solana and Tron integrations. Key features delivered: - Solana Signature Validation Robustness: Adapted Solana signature format regex to accommodate variations in length, improving validation reliability. - Pending Payments Expiration Timeout: Introduced conditional timeout for expiring pending payments to prevent excessively long pending states. - Tron Fee Calculation Across Asset Types: Extended Tron account creation fee calculation to COIN and TOKEN asset types and refactored logic for broader asset support. - Tron Client Initialization and Service Refactor: Refactored TronService to make the client readonly and extracted initialization logic; implemented lazy Tatum SDK initialization in TronClient. Major bugs fixed: - Tron Token Transfer Correctness and Fee Reporting: Fixed token transfer precision to only allow whole units, added validation for token decimals before sending, and ensured accurate retrieval of actual transaction fees on Tron. Overall impact and accomplishments: - Improved reliability and user trust through robust signature validation and safer pending payment handling. - Broader asset coverage and accurate fee accounting for Tron-driven operations, reducing edge-case errors and support overhead. - Cleaner service architecture and initialization patterns leading to more maintainable, testable code and faster feature delivery. Technologies/skills demonstrated: - Regex-based validation enhancements, feature flag/timeout patterns, and asset-type driven fee calculations. - Immutability and cleaner initialization (readonly clients, lazy SDK loading). - End-to-end impact assessment: lower error rates, improved correctness of token transfers and fee reporting.
June 2025
12 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for DFXswiss/api. In June, focused on expanding cross-chain capabilities, improving transaction classification, and hardening webhook reliability. The team delivered key features for Bitcoin categorization, Solana transfers, Gnosis/xDAI asset handling, and Alchemy webhook improvements, complemented by a critical Binance SOL symbol mapping fix. These efforts enhanced reconciliation accuracy, reduced manual intervention, and broadened asset support across the API surface.
12 Commits • 4 Features
Jun 1, 2025June 2025 monthly summary for DFXswiss/api. In June, focused on expanding cross-chain capabilities, improving transaction classification, and hardening webhook reliability. The team delivered key features for Bitcoin categorization, Solana transfers, Gnosis/xDAI asset handling, and Alchemy webhook improvements, complemented by a critical Binance SOL symbol mapping fix. These efforts enhanced reconciliation accuracy, reduced manual intervention, and broadened asset support across the API surface.
June 2025
May 2025
5 Commits • 2 Features
May 1, 2025May 2025 monthly summary for DFXswiss/api: Implemented Solana fee calculation enhancements and API alignment for Monero, delivered with explicit commit-driven changes. Key features delivered: 1) Solana fee calculation improvements including signing transactions before fee estimation for native and token costs, a priority rate, updated default priority, and an increased fee to account for variability; refined token-fee calculation to apply create-token-account fees only to actual token assets. Related commits: [DEV-3716] sign tx to get fee; [DEV-3716] added priority rate to fee calculation; [DEV-3716] add 20% to fee calculation; [DEV-3716] check asset type. 2) Monero client API compatibility: SignedTransactionResponse DTO update to align with a general SignedTransactionResponse DTO; Monero implementation remains unimplemented for now. Related commit: [NO-TASK] changed returntype sendSignedTransaction. Major bugs fixed: none documented in this work period. Overall impact: improved fee estimation reliability and token asset handling on Solana, API consistency for Monero, enabling safer cross-chain transactions and better predictability for client integrations. Technologies/skills demonstrated: blockchain fee modeling, transaction signing, API/DTO design, change management across repos.
May 2025
5 Commits • 2 Features
May 1, 2025May 2025 monthly summary for DFXswiss/api: Implemented Solana fee calculation enhancements and API alignment for Monero, delivered with explicit commit-driven changes. Key features delivered: 1) Solana fee calculation improvements including signing transactions before fee estimation for native and token costs, a priority rate, updated default priority, and an increased fee to account for variability; refined token-fee calculation to apply create-token-account fees only to actual token assets. Related commits: [DEV-3716] sign tx to get fee; [DEV-3716] added priority rate to fee calculation; [DEV-3716] add 20% to fee calculation; [DEV-3716] check asset type. 2) Monero client API compatibility: SignedTransactionResponse DTO update to align with a general SignedTransactionResponse DTO; Monero implementation remains unimplemented for now. Related commit: [NO-TASK] changed returntype sendSignedTransaction. Major bugs fixed: none documented in this work period. Overall impact: improved fee estimation reliability and token asset handling on Solana, API consistency for Monero, enabling safer cross-chain transactions and better predictability for client integrations. Technologies/skills demonstrated: blockchain fee modeling, transaction signing, API/DTO design, change management across repos.
April 2025
6 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for the DFXswiss/api repository. The team delivered a set of backend improvements across payments, price data resilience, and security, focusing on reliability, flexibility, and business value. Key changes include enhancements to Monero payment processing with improved transaction type detection and safer handling when hex data is absent, increased flexibility in payment link generation by supporting hex or tx parameters, robust handling of external price data feeds with proper error logging to maintain service continuity, and a strengthened security posture through WAF policy tuning with rate limiting and a targeted rule deactivation. These changes reduce payment failures, improve user experience for payment flows, safeguard price lookups from outages, and tighten infrastructure security through IaC-driven WAF configurations. Technologies demonstrated include robust API integration, error handling and logging, parameter validation, WAF policy automation, and IaC (Bicep) for security controls.
6 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for the DFXswiss/api repository. The team delivered a set of backend improvements across payments, price data resilience, and security, focusing on reliability, flexibility, and business value. Key changes include enhancements to Monero payment processing with improved transaction type detection and safer handling when hex data is absent, increased flexibility in payment link generation by supporting hex or tx parameters, robust handling of external price data feeds with proper error logging to maintain service continuity, and a strengthened security posture through WAF policy tuning with rate limiting and a targeted rule deactivation. These changes reduce payment failures, improve user experience for payment flows, safeguard price lookups from outages, and tighten infrastructure security through IaC-driven WAF configurations. Technologies demonstrated include robust API integration, error handling and logging, parameter validation, WAF policy automation, and IaC (Bicep) for security controls.
April 2025
March 2025
9 Commits • 5 Features
Mar 1, 2025March 2025 performance summary for DFXswiss/api. Focused on extending core business capabilities, improving reliability, and tightening domain clarity across the payments and pricing stack. Delivered feature enhancements, improved observability, and refreshed dependencies to support faster, safer future iterations.
March 2025
9 Commits • 5 Features
Mar 1, 2025March 2025 performance summary for DFXswiss/api. Focused on extending core business capabilities, improving reliability, and tightening domain clarity across the payments and pricing stack. Delivered feature enhancements, improved observability, and refreshed dependencies to support faster, safer future iterations.
February 2025
5 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for DFXswiss/api. Delivered reliability and observability enhancements centering on rule execution correctness and cron job scheduling. Implemented a bug fix to ensure proper rule deactivation handling and a feature to stabilize cron execution with configurable delays, plus enhanced monitoring to reduce noise and improve troubleshooting. These changes improve system reliability, observability, and operational efficiency, delivering clearer runtime behavior and safer scheduling across production workloads.
5 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for DFXswiss/api. Delivered reliability and observability enhancements centering on rule execution correctness and cron job scheduling. Implemented a bug fix to ensure proper rule deactivation handling and a feature to stabilize cron execution with configurable delays, plus enhanced monitoring to reduce noise and improve troubleshooting. These changes improve system reliability, observability, and operational efficiency, delivering clearer runtime behavior and safer scheduling across production workloads.
February 2025
January 2025
4 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for DFXswiss/api: Delivered Deuro Network integration, stability improvements for trading rule processing, and GS performance logging enhancements. These efforts enabled connectivity to Deuro network services, improved correctness of trading decisions by properly considering PROCESSING-status rules and logic around tradeRequired, and provided better visibility into performance bottlenecks by logging runtime for GS controller and service DB operations when execution exceeds 3 seconds. Resulting impact includes more reliable network connectivity, accurate trading behavior, and actionable performance insights for optimization.
January 2025
4 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for DFXswiss/api: Delivered Deuro Network integration, stability improvements for trading rule processing, and GS performance logging enhancements. These efforts enabled connectivity to Deuro network services, improved correctness of trading decisions by properly considering PROCESSING-status rules and logic around tradeRequired, and provided better visibility into performance bottlenecks by logging runtime for GS controller and service DB operations when execution exceeds 3 seconds. Resulting impact includes more reliable network connectivity, accurate trading behavior, and actionable performance insights for optimization.
December 2024
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for DFXswiss/api. Delivered a robust Alchemy webhook handling upgrade with strict signature validation and raw payload processing, significantly improving security and reliability of inbound webhooks.
2 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for DFXswiss/api. Delivered a robust Alchemy webhook handling upgrade with strict signature validation and raw payload processing, significantly improving security and reliability of inbound webhooks.
December 2024
November 2024
2 Commits • 2 Features
Nov 1, 2024November 2024: Delivered Docker-based deployment for the DFX Frankencoin Ponder service and enhanced webhook error logging to improve observability. Implemented a docker-compose setup and script updates to integrate the service into the existing infrastructure and backup procedures, enabling reliable, scalable deployments and quicker issue diagnosis for pay-in webhook processing. This work, focused on the DFXswiss/api repo, leverages containerization for consistent environments and improved logging for faster debugging with webhook DTOs included in error messages.
November 2024
2 Commits • 2 Features
Nov 1, 2024November 2024: Delivered Docker-based deployment for the DFX Frankencoin Ponder service and enhanced webhook error logging to improve observability. Implemented a docker-compose setup and script updates to integrate the service into the existing infrastructure and backup procedures, enabling reliable, scalable deployments and quicker issue diagnosis for pay-in webhook processing. This work, focused on the DFXswiss/api repo, leverages containerization for consistent environments and improved logging for faster debugging with webhook DTOs included in error messages.
Activity
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Quality Metrics
Correctness85.6%
Maintainability86.6%
Architecture79.8%
Performance80.6%
AI Usage20.8%
Skills & Technologies
Programming Languages
BicepDockerfileGoJSONJavaJavaScriptPythonShellTypeScriptYAML
Technical Skills
API DevelopmentAPI IntegrationAPI developmentAPI integrationAzureAzure Container AppsAzure Front DoorBackend DevelopmentBicepBlockchainBlockchain DevelopmentBlockchain IntegrationCloud DeploymentCloud InfrastructureCloud Security
Repositories Contributed To
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