{"content":"Development diary: Task 4 MVC Large Upload Funding Helper.\n\nTDD RED: added tests/chain/mvcLargeUploadFunding.test.mjs first, then ran npm run build && node --test tests/chain/mvcLargeUploadFunding.test.mjs. Build passed and the test failed as expected because dist/core/chain/mvcLargeUploadFunding.js did not exist.\n\nImplementation: added src/core/chain/mvcLargeUploadFunding.ts as an isolated pure helper. It consumes caller-provided MVC UTXOs, derives the MVC private key from the identity path, selects funding UTXOs deterministically while skipping excluded outpoints, builds the signed merge transaction, and builds the chunk/index SIGHASH_NONE pre-transactions. It does not fetch live UTXOs or call MetaFS HTTP APIs.\n\nVerification: npm run build && node --test tests/chain/mvcLargeUploadFunding.test.mjs tests/chain/mvcPendingUtxos.test.mjs tests/chain/localMnemonicSigner.test.mjs passed. git diff --check passed.","contentType":"text/plain;utf-8","attachments":[],"quotePin":""}