Add CPI depth 2 MPC test with contract.sign#3
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- Add signMessageMpcSimple using signet.js contract.sign (high-level API) - Replace single inline test with shared before() setup - Add ATA creation + transfer test exercising CPI depth 2 (proxy → ATA program → System/Token programs) - Existing test keeps Sepolia txHash logging via low-level flow
Remove MpcSigner interface, deriveWalletPDA, ethAddressFromAccount and deriveMpcEthAddress wrappers — inline their logic at call sites. Sign functions now take explicit params (contract, evmAdapter, publicClient) instead of a bundled signer object. Export PDA seed constants (WALLET_SEED, WALLET_PREFIX) for reuse across test files. Use viem's Hex type and hexToBytes directly without Buffer.from.
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Summary
signMessageMpcSimplehelper using signet.jscontract.sign(high-level API) instead of manualcreateSignatureRequest+pollForRequestIdbefore()hookMpcSigner,deriveWalletPDA,ethAddressFromAccount,deriveMpcEthAddress) — inlines their logic at call sitessignMessageMpc,signMessageMpcSimple) now take explicit params (contract,evmAdapter,publicClient) instead of a bundled signer objectWALLET_SEED,WALLET_PREFIX) for reuse across test filesHextype andhexToBytesdirectly withoutBuffer.fromwrappingTest plan
anchor test— 11 local tests passnpm run test:mpc— 2 MPC e2e tests pass (devnet + Sepolia)npm run check— rustfmt, clippy, typecheck, eslint, prettier, knip all pass