feat(example): vault privacy provider reference example#354
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A public, naming-clean reference showing how to back a pluggable VaultPrivacyProvider interface with the sipher_vault native-SOL builders (deposit/withdraw_private/refund), including the full stealth + Pedersen commitment + viewing-key assembly. Design only; implementation follows.
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What
A reference example showing how to back a pluggable
VaultPrivacyProviderinterface with thesipher_vaultprogram's native-SOL operations. Lives atexamples/vault-privacy-provider/.SipherVaultPrivacyProviderimplementsbuildFundingTx/verifyFunding/deposit/privateWithdraw/refund/previewWithdraw, backed entirely by the@sipher/sdknative-SOL builders (buildDepositSolTx,buildPrivateSendSolTx,buildRefundSolTx).privateWithdrawdemonstrates the full withdraw assembly — a one-time stealth address + Pedersen commitment + viewing-key encryption (mirroring the agent's private-send tool) — then callsbuildPrivateSendSolTx.Why
The vault is a pluggable privacy backend, but there was no end-to-end reference showing an integrator how to satisfy such an abstraction with the native-SOL instructions. This also serves as living documentation for the native-SOL builders shipped in
@sipher/sdk.Privacy model (honest by construction)
Scope
examples/*workspace entry.Testing
21 unit tests (mocked RPC, real crypto): hex helpers, stealth-artifact assembly (round-trip decrypt), and the provider (incl. the depositor-as-vault invariant via tx-signer interception + rent-exempt-guard propagation).
tsc --noEmitclean; naming/style gates clean.Design spec and implementation plan are included under
docs/superpowers/.