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Add support for the ENS Hardware-Controlled Account (HCA), a Nexus-based smart account with locked-down module management for ENS hardware-backed signers. Includes factory encoding, CREATE3 address derivation, EIP-712 domain, signature packing, unit tests, and deployment test. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Description
Adds support for the ENS Hardware-Controlled Account (HCA), a Nexus-based smart account with locked-down module management designed for ENS hardware-backed signers. The HCA blocks
installModule/uninstallModuleafter initialization and uses immutable default validator and executor modules set in the constructor.Key additions:
src/accounts/hca.ts— Full account implementation: factory initData encoding, Solady CREATE3 address derivation, EIP-712 domain, signature packinggetDeployArgs,getAddress,getEip712Domain,getEip1271Signature, etc.)ENS_VALIDATOR_ADDRESStoENS_HCA_MODULEwith updated deployed address (0x432df07B...)Checklist