
Laurent Castillo contributed to LedgerHQ’s clear-signing-erc7730-registry and app-ethereum repositories, focusing on blockchain integration and smart contract development using TypeScript, Solidity, and C. He delivered features such as ERC-4626 vault support, automated schema migrations, and enhanced data transparency for ERC20 calls. Laurent implemented batch migration tools and test automation to streamline registry upgrades, improve data integrity, and reduce manual intervention. His work included input validation, configuration visibility, and robust test coverage, addressing reliability and maintainability. By developing migration scripts and UI enhancements, Laurent enabled smoother on-chain interactions and established scalable processes for future upgrades and governance workflows.

February 2026: Focused on enabling scalable schema migrations and robust test coverage for ERC-7730 registry with automation to reduce manual work and accelerate delivery.
February 2026: Focused on enabling scalable schema migrations and robust test coverage for ERC-7730 registry with automation to reduce manual work and accelerate delivery.
January 2026 monthly summary: Delivered the ERC-7730 Registry upgrade to Version 2 via an automated migration script, including schema updates, field transformations, and cleanup of null values. No major bugs reported; data quality improvements reduce downstream issues and simplify future upgrades. This work strengthens data integrity and interoperability in LedgerHQ's clear-signing registry, enabling smoother downstream integration and setting a foundation for future registry upgrades.
January 2026 monthly summary: Delivered the ERC-7730 Registry upgrade to Version 2 via an automated migration script, including schema updates, field transformations, and cleanup of null values. No major bugs reported; data quality improvements reduce downstream issues and simplify future upgrades. This work strengthens data integrity and interoperability in LedgerHQ's clear-signing registry, enabling smoother downstream integration and setting a foundation for future registry upgrades.
LedgerHQ/app-ethereum — August 2025 monthly summary: Delivered a focused UI feature that enhances ERC20 call visibility by displaying extra data (trailing calldata) in ASCII or hex, improving debugging and auditing capabilities. This aligns with product goals of better data transparency in on-chain interactions and supports faster issue diagnosis for ERC20 flows.
LedgerHQ/app-ethereum — August 2025 monthly summary: Delivered a focused UI feature that enhances ERC20 call visibility by displaying extra data (trailing calldata) in ASCII or hex, improving debugging and auditing capabilities. This aligns with product goals of better data transparency in on-chain interactions and supports faster issue diagnosis for ERC20 flows.
February 2025 — Focused on expanding vault interoperability and tightening robustness in the clear-signing-erc7730-registry. Key deliverables include ERC-4626 Vault support enabling yield-bearing vault interactions and improved asset management, configuration visibility with constants display and corrected routing for reliable resource loading, and mandatory type checking on address name formatters to prevent data-type errors. These changes improve reliability, security, and developer productivity, while enhancing interoperability with ERC-4626 vaults and reducing maintenance risk.
February 2025 — Focused on expanding vault interoperability and tightening robustness in the clear-signing-erc7730-registry. Key deliverables include ERC-4626 Vault support enabling yield-bearing vault interactions and improved asset management, configuration visibility with constants display and corrected routing for reliable resource loading, and mandatory type checking on address name formatters to prevent data-type errors. These changes improve reliability, security, and developer productivity, while enhancing interoperability with ERC-4626 vaults and reducing maintenance risk.
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