Tx evaluation

[ginnun]

Resolves #306

Stacked on #537 - merge that one first.

Context

Implements tx evaluation APIs compatible with the Blockfrost.io version:

• /utils/txs/evaluate
• /utils/txs/evaluate/utxos

What is added

• Two new endpoints with integration tests
• bf-tx-evaluator crate providing native (Rust, via pallas-validate) and external (Haskell, via testgen-hs) evaluators
• ChainConfigWatch in bf-node - a background task that watches the Cardano node and publishes protocol params + genesis config via tokio::sync::watch, refreshed only at epoch boundaries
• Node helpers: ledger, utxo, chain_config_watch

What is changed

• Pallas fork switched to blockfrost/pallas with pallas-validate (phase2 feature) for script evaluation
• CBOR validation error messages improved (graceful fallback on pallas-hardano formatting failure)
• Devshell picks up tools needed by the new native deps - m4 (for secp256k1-sys), make/awk/diffutils (for integration tests)
• cardano-node trace silencing migrated to the newer API
• CI: CARGO_PROFILE_DEV_DEBUG=0 on integration-test jobs to reduce disk pressure

What is scoped out (now in #537)

• testgen-hs subprocess handling extracted from crates/node/src/cbor/ into dedicated bf-testgen and bf-error-decoder crates
• testgen-hs version bump to 10.6.3.1 and release binary downloads switched to blockfrost/testgen-hs
• build_utils target detection helpers factored out

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[michalrus]

Hey, I started reviewing, but then noticed that it's a draft! Left a few comments either way :)

[michalrus]

Maybe let's have a simpler merge commit for the current conflicts? 🥺 Unless you're using git-rerere.

[michalrus]

I've just merged main into this PR in cd2794a — I hope correctly… … 🫣

[michalrus]

I pushed another merge with main, because there were some more conflicts to resolve. I hope I did that correctly!

Now I see that cargo test tests are failing:

❯ cargo nextest run --workspace --lib --verbose

…

     Summary [  76.650s] 650 tests run: 195 passed, 455 failed, 0 skipped

Stuff like:

        FAIL [   1.058s] blockfrost-platform-error-decoder external::tests::test_cbor_0001_ConwayTreasuryValueMismatch_Coin_Coin

Or:

        FAIL [   1.086s] blockfrost-platform-error-decoder tests::specific::test_cbor_0013_ConwayWdrlNotDelegatedToDRep_KeyHash_KeyHash

[michalrus]

Maybe the tests are failing because my commits updated testgen-hs to 10.4.1.2 also in the devshell. And it's the one against which the old CBOR tests are being run. 🤔

[ginnun]

Everything is working related to this PR. The CI failure is caused by updated ledger codebase coming from the testgen-hs binary

[michalrus]

The CI failure is caused by updated ledger codebase coming from the testgen-hs binary

So what do you suggest to be a solution here?

Maybe update testgen-hs in a separate PR, to not mix them, and fix it there? And park this one until we're again matching the Haskell trasaction submission errors?

(I think we shouldn’t be merging "red" ❌ PRs.)

[michalrus]

@ginnun wait, but why did I get the same error in:

• Add Hydra micropayments (gateway↔end user) #451
• https://github.com/blockfrost/blockfrost-platform/actions/runs/22299917932/job/64507216767?pr=451

I don’t have your changes (the updated testgen-hs).

So the integration tests would also fail on main now? Perhaps due to devops updating cardano-node in the "legacy" Blockfrost API?

[michalrus]

Look here:

Deploying cardano-node version v10.6.2 to dev hosts

on 2026-02-19T02:55:30,167769000+00:00.

[ginnun]

So what do you suggest to be a solution here?

The plan is to fix/update the code for pallas/hardano. Until than, we can disable that specific test since it will fail for every branch. What do you say @michalrus ?

[michalrus]

The plan is to fix/update the code for pallas/hardano.

Great! Here's a tracking issue for this new work:

• Platform integration tests failing on recent branches #459

[michalrus]

Until than, we can disable that specific test since it will fail for every branch. What do you say @michalrus ?

I suppose… Hmm, WDYT, @vladimirvolek?

This temporary fix is in:

• chore: temporarily ignore test_route_submit_error (submission errors changed) #460