Description

Builds on top of aptos-labs/aptos-core#18300 by adding support for creating post-quantum signatures (as per AIP-137).

Specifically, adds support for SLH-DSA-SHA2-128s:

• key generation
• signing & verification
• (de)serialization
• HD wallet key derivation (custom, non-standard SLIP-0010 "curve" parameter used)

Steps to confirm this works with an Aptos node

First, have Docker launched and pnpm prerequisites installed:

pnpm install

Second, set up a local net:

ulimit -n unlimited
cargo run -p aptos -- node run-localnet --with-indexer-api --assume-yes --force-restart

Third, run the e2e TXN submission test:

pnpm test transactionSubmission.test.ts

Tasks

• minimize overhead on SDK size of newly-added noble/post-quantum dependency (somehow; perhaps @gregnazario can advise)
• fix pnpm test / pnpm jest to work with @noble-post-quantum
• manually confirm SLH DSA TXNs verify on the new aptos-core
• manually confirm SLH DSA TXN do not verify on the old aptos-core
• implement fromDerivationPath for the private key using "SLH-DSA-SHA2-128s seed" as the Curve parameter and n set to $2^{256}$, AFAICT.

Test Plan

• unit tests
• e2e tests against an Aptos full node

Checklist

• Have you ran pnpm fmt?
• Have you updated the CHANGELOG.md?