
Crewe worked on the chainapsis/keplr-wallet repository, delivering robust cross-chain wallet features and improving transaction reliability across Bitcoin, Ethereum, and Starknet networks. He engineered end-to-end flows for PSBT signing, UTXO management, and fee estimation, integrating technologies like TypeScript, React, and BitcoinJS-lib. His approach emphasized modular architecture, observable state management with MobX, and seamless hardware wallet integration, particularly with Ledger devices. By refining gas estimation, transaction normalization, and cross-ecosystem selectors, Crewe enhanced user experience and reduced operational risk. His work demonstrated depth in blockchain interaction, cryptography, and API integration, resulting in a more stable, extensible, and user-friendly wallet platform.

October 2025 monthly summary: Delivered focused UX and reliability improvements in chainapsis/keplr-wallet, emphasizing top-up flow, header visuals, and cross-chain Ledger integration. Implemented maintainable code changes (Top Up hook) and robust Ethereum/Cosmos/Starknet handling, driving a smoother user experience and stronger multi-chain support. These changes reduce error states, improve localization and signing UX, and lay groundwork for upcoming features.
October 2025 monthly summary: Delivered focused UX and reliability improvements in chainapsis/keplr-wallet, emphasizing top-up flow, header visuals, and cross-chain Ledger integration. Implemented maintainable code changes (Top Up hook) and robust Ethereum/Cosmos/Starknet handling, driving a smoother user experience and stronger multi-chain support. These changes reduce error states, improve localization and signing UX, and lay groundwork for upcoming features.
September 2025 (2025-09) monthly summary for chainapsis/keplr-wallet focusing on delivering user-focused UX improvements, network fee predictability, expanded asset support, and branding updates. The work emphasizes business value through improved fee controls, safer and clearer Ethereum signing flows, broader token coverage across Layer 1/2 and StarkNet, and a refreshed brand presence, alongside quality fixes to strengthen reliability.
September 2025 (2025-09) monthly summary for chainapsis/keplr-wallet focusing on delivering user-focused UX improvements, network fee predictability, expanded asset support, and branding updates. The work emphasizes business value through improved fee controls, safer and clearer Ethereum signing flows, broader token coverage across Layer 1/2 and StarkNet, and a refreshed brand presence, alongside quality fixes to strengthen reliability.
August 2025 performance summary: Delivered cross-repo enhancements and reliability improvements across the keplr-wallet and keplr-chain-registry repos, focusing on API alignment, fee estimation safety, and user experience. The work overcame integration frictions with Starknet and Ethereum-related components, enabling more robust product behavior and business value.
August 2025 performance summary: Delivered cross-repo enhancements and reliability improvements across the keplr-wallet and keplr-chain-registry repos, focusing on API alignment, fee estimation safety, and user experience. The work overcame integration frictions with Starknet and Ethereum-related components, enabling more robust product behavior and business value.
July 2025 (chainapsis/keplr-wallet) delivered two major user-impact features and improved ETH gas pricing accuracy. Business impact includes enabling data-fee configurations for Unichain to unlock data-fee capabilities and more accurate ETH gas price estimation to reduce overpayment and improve user experience. No critical bugs reported; addressed a gap by introducing the missing op-stack-l1-data-fee feature. Technologies demonstrated include on-chain data-fee configuration, Ethereum fee history-based pricing, and heuristic-based gas calculations, with strong commit-level traceability.
July 2025 (chainapsis/keplr-wallet) delivered two major user-impact features and improved ETH gas pricing accuracy. Business impact includes enabling data-fee configurations for Unichain to unlock data-fee capabilities and more accurate ETH gas price estimation to reduce overpayment and improve user experience. No critical bugs reported; addressed a gap by introducing the missing op-stack-l1-data-fee feature. Technologies demonstrated include on-chain data-fee configuration, Ethereum fee history-based pricing, and heuristic-based gas calculations, with strong commit-level traceability.
June 2025 monthly summary for chainapsis/keplr-wallet: Focused on stabilizing signing flows, enriching staking visibility, and improving cross‑chain UX, while expanding wallet capabilities and reducing operational risk.
June 2025 monthly summary for chainapsis/keplr-wallet: Focused on stabilizing signing flows, enriching staking visibility, and improving cross‑chain UX, while expanding wallet capabilities and reducing operational risk.
May 2025 monthly performance summary for chainapsis/keplr-wallet highlighting business value and technical achievements. The month focused on delivering cross-chain features, strengthening reliability, and optimizing performance to support growth in Starknet and BTC delegation workflows, while improving fee economics across networks.
May 2025 monthly performance summary for chainapsis/keplr-wallet highlighting business value and technical achievements. The month focused on delivering cross-chain features, strengthening reliability, and optimizing performance to support growth in Starknet and BTC delegation workflows, while improving fee economics across networks.
April 2025 focused on strengthening Ledger workflows, expanding cross‑chain support, and improving performance for keplr-wallet. Key features delivered include Ledger PSBT derivation handling for external sign requests with Ledger; Ledger descriptor template and script types for Babylon staking; and foundational descriptor/bip-380 support across Bitcoin‑Ledger code paths. In addition, reliability and performance were boosted by introducing ObservableQueryAssetsBatch and asset caching to stabilize asset data queries. PSBT handling and validation were enhanced to support native segwit/taproot scenarios and more robust signing flows, improving on‑device signing reliability and the user experience. Major bug fixes addressed ledger block script path spending, derivation path edge cases for enabling Bitcoin chains, select-all or linked chain issues, and improved Ledger connection error handling, along with scene transition fixes for Bitcoin connect steps. The combined effort strengthens security, reliability, cross‑chain compatibility, and performance, enabling safer Ledger onboarding, faster asset queries, and Babylon dapp compatibility.
April 2025 focused on strengthening Ledger workflows, expanding cross‑chain support, and improving performance for keplr-wallet. Key features delivered include Ledger PSBT derivation handling for external sign requests with Ledger; Ledger descriptor template and script types for Babylon staking; and foundational descriptor/bip-380 support across Bitcoin‑Ledger code paths. In addition, reliability and performance were boosted by introducing ObservableQueryAssetsBatch and asset caching to stabilize asset data queries. PSBT handling and validation were enhanced to support native segwit/taproot scenarios and more robust signing flows, improving on‑device signing reliability and the user experience. Major bug fixes addressed ledger block script path spending, derivation path edge cases for enabling Bitcoin chains, select-all or linked chain issues, and improved Ledger connection error handling, along with scene transition fixes for Bitcoin connect steps. The combined effort strengthens security, reliability, cross‑chain compatibility, and performance, enabling safer Ledger onboarding, faster asset queries, and Babylon dapp compatibility.
March 2025 monthly performance for chainapsis/keplr-wallet focused on Bitcoin workflows. Delivered end-to-end PSBT signing/building flow for offline signing, improved UTXO management, and enhanced fee handling, plus UX improvements for Bitcoin enablement and sends. These changes increase security and reliability for Bitcoin transactions, reduce transaction failures, and improve cost transparency for users and business metrics.
March 2025 monthly performance for chainapsis/keplr-wallet focused on Bitcoin workflows. Delivered end-to-end PSBT signing/building flow for offline signing, improved UTXO management, and enhanced fee handling, plus UX improvements for Bitcoin enablement and sends. These changes increase security and reliability for Bitcoin transactions, reduce transaction failures, and improve cost transparency for users and business metrics.
February 2025 monthly performance highlights: - Chain registry: Implemented EDEN branding and added missing staking URLs for chains in the Keplr dashboard, enabling EDEN visualization and staking flow in the registry. Key commits include adding EDEN to elys chain and updating missing staking URLs. - Starknet staking data in Keplr Wallet: Delivered Starknet native staking data queries (pool member info, validator list, staking info, and reward address) to enable real-time staking insights across networks. - Staked balance UI/UX: Refined the staked balance experience with a stub component, layout improvements, hover color enhancements, and clear display of staked amounts and unbondings; adjustments for Sepolia status. - Cross-network rewards and Starknet inner-tx: Enabled claiming rewards across networks (including Elys) and integrated Starknet inner-tx execution with new hooks and signTx parameter. - Bitcoin scaffolding and modular chain-info improvements: Laid groundwork for Bitcoin support with scaffolding, signet/testnet integration, and Bitcoin keyring service enhancements; introduced Schnorr signing, PSBT support, and modular chain-info enhancements to support multi-asset workflows. Overall this month delivered multi-chain staking capabilities, improved data access and UI quality, and foundational Bitcoin readiness that positions us for broader multi-chain support and higher business value.
February 2025 monthly performance highlights: - Chain registry: Implemented EDEN branding and added missing staking URLs for chains in the Keplr dashboard, enabling EDEN visualization and staking flow in the registry. Key commits include adding EDEN to elys chain and updating missing staking URLs. - Starknet staking data in Keplr Wallet: Delivered Starknet native staking data queries (pool member info, validator list, staking info, and reward address) to enable real-time staking insights across networks. - Staked balance UI/UX: Refined the staked balance experience with a stub component, layout improvements, hover color enhancements, and clear display of staked amounts and unbondings; adjustments for Sepolia status. - Cross-network rewards and Starknet inner-tx: Enabled claiming rewards across networks (including Elys) and integrated Starknet inner-tx execution with new hooks and signTx parameter. - Bitcoin scaffolding and modular chain-info improvements: Laid groundwork for Bitcoin support with scaffolding, signet/testnet integration, and Bitcoin keyring service enhancements; introduced Schnorr signing, PSBT support, and modular chain-info enhancements to support multi-asset workflows. Overall this month delivered multi-chain staking capabilities, improved data access and UI quality, and foundational Bitcoin readiness that positions us for broader multi-chain support and higher business value.
January 2025 summary for chainapsis/keplr-wallet: Focused on reliability and UX improvements for cross-chain transaction flows. Key features delivered include Cosmos transaction tracing and send history reliability, with improved handling for single transaction results and robust error tracking, reducing user-visible inconsistencies. On the EVM side, enhanced fee handling and signing UX with support for user-defined fees, manual fee adjustments, and safer configurations; implemented accurate total fee calculations including L1 data fees, and improved fee visibility on signing and modal components. Additional improvements include corrective fixes in L1 data fee calculation by ensuring the proxy contract is used for op stack L1 data fees, improving overall cost transparency and reducing misconfigurations. These changes deliver business value by increasing reliability, reducing failed transactions, enhancing cost transparency, and enabling safer user interactions during signing.
January 2025 summary for chainapsis/keplr-wallet: Focused on reliability and UX improvements for cross-chain transaction flows. Key features delivered include Cosmos transaction tracing and send history reliability, with improved handling for single transaction results and robust error tracking, reducing user-visible inconsistencies. On the EVM side, enhanced fee handling and signing UX with support for user-defined fees, manual fee adjustments, and safer configurations; implemented accurate total fee calculations including L1 data fees, and improved fee visibility on signing and modal components. Additional improvements include corrective fixes in L1 data fee calculation by ensuring the proxy contract is used for op stack L1 data fees, improving overall cost transparency and reducing misconfigurations. These changes deliver business value by increasing reliability, reducing failed transactions, enhancing cost transparency, and enabling safer user interactions during signing.
December 2024 monthly performance summary for chain-related initiatives. The team delivered notable improvements across chain discovery, wallet UX, data fetching, and cross-chain history tracking, driving better user experience, broader chain coverage, and more efficient development cycles. Business impact includes faster, more accurate chain search, smoother UI interactions, and stronger support for non-native and cross-chain workflows.
December 2024 monthly performance summary for chain-related initiatives. The team delivered notable improvements across chain discovery, wallet UX, data fetching, and cross-chain history tracking, driving better user experience, broader chain coverage, and more efficient development cycles. Business impact includes faster, more accurate chain search, smoother UI interactions, and stronger support for non-native and cross-chain workflows.
November 2024 delivered a privacy-preserving, UX-consistent, and cross-network wallet experience with a focus on business value and developer productivity. Key features deliverable improved transaction and permission flows across the wallet, strengthened UI consistency, and expanded StarkNet support for broader address resolution across networks.
November 2024 delivered a privacy-preserving, UX-consistent, and cross-network wallet experience with a focus on business value and developer productivity. Key features deliverable improved transaction and permission flows across the wallet, strengthened UI consistency, and expanded StarkNet support for broader address resolution across networks.
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