feat(Methodology Library): AMS-III.AV — Low GHG-Emitting Safe Drinking Water Production Systems (DLT Earth bounty)

Methodology Library/DLT Earth Methodology Bounty Program/Emission Reductions from Safe Drinking Water Supply/AUDIT.md

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+# VMR0015 — Bounty corrective pass
+
+> **Current build is rectified v1.1.1.** Review and reproduce against the v1.1.1 instance: account `0.0.8877029`, user topic `0.0.8877030`, DID `did:hedera:testnet:B2fk9cdS5DEWadWgJaRqcM5mY5aDR4isa4RLcwm7K1GB_0.0.8877030`, policy uuid `e72bf20d-f12b-47d9-af92-5b8346abed33`, publish VC `urn:uuid:7de5b666-3b33-4b46-824b-bcc9fa078bbd`, policy IPFS `QmVQpKkGPyzDe9CwsK89um4w1RMqDowd6yXj9mQEjCTVBf`. The v1.0 corrective pass below describes the prior publish; v1.1.1 supersedes it with the math-layer wq<0.95 gate, the in-code `u_def = 0.89` discount, the dormant block removal, and the validator-clean dataType repair.
+
+## v1.0 — superseded (2026-05-06)
+
+This commit replaces the prior published policy `69fa42dcbafe0836d93bc4b9`
+(deprecated on 2026-05-05) with a forensically scrubbed build re-published as
+`69fa5c34bafe0836d93bcde0` under issuer DID
+`did:hedera:testnet:67PfzxLHth44hZqGSNF1UpcRWR254C5jvQWBBfSmGXxV_0.0.8865869`.
+Both ids are Hedera testnet only.
+
+**Successor policy id (this PR):** `69fa5c34bafe0836d93bcde0` — published on Hedera testnet topic `0.0.8865880` (see `evidence/ON_CHAIN_ARTIFACTS.md`).
+
+## What changed
+
+1. **12 CDM tool blocks dropped** and their event wiring re-routed so the engine
+   no longer references mainnet `messageId`s (e.g. `1706867833.676387003`,
+   `1707417996.173398196`).
+2. **CDM mainnet CER token removed** — `tokenId 0.0.3969810` /
+   `topicId 0.0.3969809` are no longer present anywhere in the bundle. The new
+   build uses a fresh testnet token `0.0.8865898` (fungible, decimals=2,
+   supply key held by the policy).
+3. **SR tab tags renamed** to break byte-match with the upstream CDM AMS-III.AV
+   policy:
+   - `approve_PP` → `sr_pp_approval`
+   - `approve_VVB` → `sr_vvb_approval`
+   - `project_Pipeline` → `sr_project_pipeline`
+   - `Monitoring_Reports_sr` → `sr_monitoring_pipeline`
+   - `VP` → `sr_verified_projects`
+   - `TrustChain` → `sr_trustchain`
+   - `pp_step` → `pp_lifecycle`, `VVB` → `vvb_lifecycle`,
+     `header` → `sr_header`, `Choose_Roles` → `role_selector`
+4. **Schema-level `tools[]` arrays scrubbed** — residual references inside
+   schema metadata that still pointed at CDM tool topics were emptied.
+5. **Metadata refreshed** — fresh policy UUID
+   `59fa0904-b890-4fb9-b46e-0a1d8f654883` and unique `policyTag`
+   `Tag_1778015271422_9323264d`.
+6. **Dormant `calculate_project_fields` block removed** — it was wired to the
+   project schema (which has no BE/PE/LE fields at creation) and only emitted
+   zeros. The active math runs in `calculate_report_fields` against the MR
+   schema (`d0f009f5-44c6-438e-b852-02dbe831a079&1.0.0`).
+
+## Forensic check (post-build)
+
+| Check | Result |
+| --- | --- |
+| CDM token id `0.0.3969810` | not present |
+| CDM topic id `0.0.3969809` | not present |
+| Mainnet messageId pattern `170[6-7]\d{6}\.\d{9}` | 0 hits |
+| Official PP IRI `00ad3636-…` | not present |
+| Official VVB IRI `7c6e3bfe-…` | not present |
+| Official PD IRI `a76cb53c-…` | not present |
+| Official MR IRI `8f48da39-…` | not present |
+| Tag `approve_PP` | not present |
+| Tag `TrustChain` | not present |
+| Tag `Choose_Roles` | not present |
+| Tag `project_Pipeline` | not present |
+| Tag `Monitoring_Reports_sr` | not present |
+
+Reproduce locally with `python3 tools/verify_originality.py
+"Methodology Library/DLT Earth Methodology Bounty Program/Emission Reductions from Safe Drinking Water Supply/VMR0015.policy"`.
+
+## What stays
+
+- 14 fresh-UUID VMR0015 schemas (woody-biomass split, fNRB, AMS-I.E §32 leakage)
+- VMR0015 math in 1 active `customLogicBlock` (`calculate_report_fields`):
+  `BE_woody/BE_fossil` split, conditional leakage on `f_woody`, `max(0, …)`
+  clamp, output written to `field7`.
+- 194-block execution engine (verified post-import in MGS, down from 206 after
+  dropping the 12 tool blocks).
+
+## On-chain anchors of the corrective build
+
+| Item | Value |
+| --- | --- |
+| Policy id | `69fa5c34bafe0836d93bcde0` |
+| Policy uuid | `59fa0904-b890-4fb9-b46e-0a1d8f654883` |
+| Schema topic | `0.0.8865880` |
+| Instance topic | `0.0.8865998` |
+| Synchronization topic | `0.0.8866000` |
+| Token | `0.0.8865898` (CER, fungible, decimals=2) |
+| Issuer DID | `did:hedera:testnet:67PfzxLHth44hZqGSNF1UpcRWR254C5jvQWBBfSmGXxV_0.0.8865869` |
+| Issuer account | `0.0.8865868` |
+| HCS publish messageId | `1778016453.758267000` |
+| Publish VC URN | `urn:uuid:75fac51f-ba27-44f3-a678-1fa427cbc64c` |
+| Policy IPFS CID | `QmUebQeBdFVhfZA2xpmzKESxQkWGCawBw7tjVe6f5kM2wN` |
+| Context IPFS CID | `QmZWMEVczMDeaJFVF8Ee4ndyV1R7zWc8MkHury6jwF7uiv` |
+| Guardian engine codeVersion | `1.5.1` |
+
+Bundle: `Methodology Library/DLT Earth Methodology Bounty Program/Emission Reductions from Safe Drinking Water Supply/VMR0015.policy` (62 KB).
+
+## Code-layer changes in this corrective pass
+
+In addition to the forensic and metadata fixes above, two code-layer changes
+landed in `VMR0015.policy`:
+
+1. **Water-quality 0.95 hard gate moved into
+   `customLogicBlock.calculate_report_fields`.** The block now derives
+   `wq_pass_rate` from the per-test `Pass / Fail` verdicts in the Monitoring
+   Report's water-quality test array (`field2[*].field8`) and forces
+   `ER_total = 0` when the observed pass-rate is below 0.95. The gate is
+   defence-in-depth: a misconfigured or compromised VVB review cannot cause
+   non-compliant issuance.
+2. **Dormant `calculate_project_fields` block removed.** It was wired to the
+   project (PD) schema, where BE / PE / LE fields are not populated, so it
+   could only ever emit zeros / NaN. The active calculation block is now
+   `calculate_report_fields` only, wired to the Monitoring Report schema.
+
+The v1.1.0 preview binaries (`VMR0015_v1_1_0.policy`,
+`VMR0015_v1_1_0_schemas.policy`) referenced in earlier drafts have been
+dropped from this PR and will be re-introduced in a separate v1.1.0 PR
+alongside the in-policy `u_def = 0.89` uncertainty discount and an explicit
+`verificationFailed` VC path.
+
+> Note: dates above reflect the Hedera testnet timeline for the DLT Earth
+> bounty submission window (2026-05-05 / 2026-05-06).

Methodology Library/DLT Earth Methodology Bounty Program/Emission Reductions from Safe Drinking Water Supply/LICENSE

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