
Sebastien Palmer contributed to protocol compatibility and configuration management in the LedgerHQ/app-exchange and LedgerHQ/ledger-app-database repositories. He implemented Tezos Seoul protocol reveal encoding compatibility by adding an empty proof field to reveal operations, ensuring future readiness for BLS key integration while maintaining separation between production and test environments. In a subsequent update, Sebastien disabled BLS curve support in Tezos baking app parameters through a configuration change, aligning with product strategy and simplifying maintenance. His work demonstrated expertise in blockchain development and Python, with a focus on protocol alignment, risk reduction, and clear commit traceability, reflecting thoughtful, targeted engineering over two months.

In August 2025, delivered a strategic configuration change in LedgerHQ/ledger-app-database: disabled BLS curve support in Tezos baking app parameters. The change is a configuration/parameter adjustment with no code changes, aligning with the product strategy to de-emphasize BLS-based baking. This reduces complexity and risk, simplifies future maintenance, and clarifies the road map for Tezos baking within Ledger devices. Commit traceability is preserved for audits and reviews.
In August 2025, delivered a strategic configuration change in LedgerHQ/ledger-app-database: disabled BLS curve support in Tezos baking app parameters. The change is a configuration/parameter adjustment with no code changes, aligning with the product strategy to de-emphasize BLS-based baking. This reduces complexity and risk, simplifies future maintenance, and clarifies the road map for Tezos baking within Ledger devices. Commit traceability is preserved for audits and reviews.
June 2025 — LedgerHQ/app-exchange: Implemented Tezos Seoul protocol reveal encoding compatibility. Added an empty proof field to reveal operations to align encoding with Seoul protocol requirements for BLS keys, while the test environment continues to use tz1 keys and does not require the proof for swapping. No major bugs fixed this month. Impact: increases protocol upgrade readiness, improves interoperability with Tezos Seoul, and reduces risk of reveal-encoding regressions during future upgrades. Technologies/skills demonstrated: Tezos protocol knowledge, encoding adjustments, disciplined change management with Git commits (26b1cc113e5ef923a2683ce969f33e1792f4023b), and clear separation between production and test environments.
June 2025 — LedgerHQ/app-exchange: Implemented Tezos Seoul protocol reveal encoding compatibility. Added an empty proof field to reveal operations to align encoding with Seoul protocol requirements for BLS keys, while the test environment continues to use tz1 keys and does not require the proof for swapping. No major bugs fixed this month. Impact: increases protocol upgrade readiness, improves interoperability with Tezos Seoul, and reduces risk of reveal-encoding regressions during future upgrades. Technologies/skills demonstrated: Tezos protocol knowledge, encoding adjustments, disciplined change management with Git commits (26b1cc113e5ef923a2683ce969f33e1792f4023b), and clear separation between production and test environments.
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