feat(mbe): use custom signing fns for mpcv2 signing/sendmany

[pranavjain97]

Ticket: WP-5232

[mohammadalfaiyazbitgo]

The function name createEcdsaMPCv2SendParams doesn't match the comment. makes it seem the function is specifc for mpcv2 but you handle other wallet types as well.

[pranavjain97]

not sure what you mean; it only returns custom fns for mpcv2 + the given send params

[mohammadalfaiyazbitgo]

remove comments.

[mohammadalfaiyazbitgo]

it's not supported for utxos either from what I recall.

[pranavjain97]

sure - but not part of mpc branch

[mohammadalfaiyazbitgo]

@claude

[Copilot]

Pull Request Overview

This PR replaces legacy MPC signing flows with custom ECDSA MPCv2 signing functions, renames GPG key parameters for consistency, and consolidates EDDSA and ECDSA handlers to work directly on TxRequest objects.

• Rename bitgoGpgPubKey to bitgoPublicGpgKey in API spec and handlers.
• Introduce createEcdsaMPCv2CustomSigners and wire it into sendMany and transaction endpoints.
• Refactor EDDSA and ECDSA MPCv2 signing code to accept full TxRequest objects and remove outdated methods.

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/enclavedBitgoExpress/routers/enclavedApiSpec.ts	Rename GPG key field and restrict shareType to known literals
src/api/master/handlers/transactionRequests.ts	Add unified signAndSendTxRequests for EDDSA and ECDSA MPC flows
src/api/master/handlers/handleSendMany.ts	Implement ECDSA MPCv2 custom signers and remove old code paths
src/api/master/handlers/generateWallet.ts	Update ECDSA key generation import to new ecdsaMPCv2 module
src/api/master/handlers/eddsa.ts	Refactor EDDSA signing to accept TxRequest and rename key param
src/api/master/handlers/ecdsaMPCv2.ts	Create custom ECDSA MPCv2 signer generators and refactor sender
src/api/master/clients/enclavedExpressClient.ts	Update MPCv2 methods to include source/pub and rename param
src/api/enclaved/handlers/signMpcTransaction.ts	Update unified handler to use renamed fields and typed shareType
src/tests/api/master/sendMany.test.ts	Adjust tests for new sendMany flow and rename parameter stubs
src/tests/api/master/eddsa.test.ts	Skip EDDSA tests until new custom flow is in place
src/tests/api/master/ecdsa.test.ts	Switch to new signAndSendEcdsaMPCv2FromTxRequest entry point
src/tests/api/enclaved/signMpcTransaction.test.ts	Update tests for renamed GPG key field and share-type handling

Comments suppressed due to low confidence (3)

src/api/master/handlers/handleSendMany.ts:8

• Imported PrebuildTransactionResult but the code uses PrebuildTransactionOptions. Replace or add the correct import for PrebuildTransactionOptions from @bitgo/sdk-core to ensure the type is available.

  PrebuildTransactionResult,

src/api/master/handlers/handleSendMany.ts:5

• [nitpick] The KeyIndices import is not used in this file and can be removed to improve readability and avoid dead code.

  KeyIndices,

src/api/master/handlers/ecdsaMPCv2.ts:7

• [nitpick] The SupplementGenerateWalletOptions import is not referenced elsewhere in this module and should be removed to reduce unused dependencies.

  SupplementGenerateWalletOptions,