IIE · Tamper-Evident Audit Ledger

Hash-Chained Ledger

Every IIE transaction is recorded as a chained block. Each block’s hash is computed from its own payload plus the previous block’s hash — so altering any single field breaks every subsequent block. This is the exact mechanism a blockchain formalises.

✓ CHAIN VALID4 BLOCKS
GENESIS — 0000000000000000…
👤
#1 — POLICY_ENROLLED
1/7/2026, 13:44:22 IST
✓ VALID
Payload
policy_id
SBI-IIE-00341click to edit
farmer
Ramesh Kumarclick to edit
vpa
rameshkumar@sbiclick to edit
district
Khammamclick to edit
crop
Paddyclick to edit
acreage
4click to edit
aadhaar_kyc
VERIFIEDclick to edit
digilocker
FETCHEDclick to edit
prev_hash
0000000000000000000000000000000000000000000000000000000000000000
this_hash ✓
12d886c912d886c912d886c912d886c912d886c912d886c912d886c912d886c9
🛰️
#2 — ORACLE_QUORUM_TRIGGERED
1/7/2026, 13:44:32 IST
✓ VALID
Payload
policy_id
SBI-IIE-00341click to edit
peril
floodclick to edit
rainfall_mm
210click to edit
ndvi
0.58click to edit
temp_c
34.1click to edit
soil_pct
68click to edit
weighted_confidence
87click to edit
quorum_met
trueclick to edit
prev_hash
12d886c912d886c912d886c912d886c912d886c912d886c912d886c912d886c9
this_hash ✓
5be637f85be637f85be637f85be637f85be637f85be637f85be637f85be637f8
⛓️
#3 — CONTRACT_STATE_TRIGGERED
1/7/2026, 13:44:33 IST
✓ VALID
Payload
policy_id
SBI-IIE-00341click to edit
prev_state
ACTIVEclick to edit
new_state
TRIGGEREDclick to edit
payout_amount
55000click to edit
execute_fn
execute_payout()click to edit
prev_hash
5be637f85be637f85be637f85be637f85be637f85be637f85be637f85be637f8
this_hash ✓
438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6
💸
#4 — IMPS_SETTLED
1/7/2026, 13:44:36 IST
✓ VALID
Payload
policy_id
SBI-IIE-00341click to edit
rrn
924819023741click to edit
utr
SBIN192305723click to edit
upi_ref
YONO1751339076click to edit
amount
55000click to edit
beneficiary_vpa
rameshkumar@sbiclick to edit
npci_member
SBIN0000001click to edit
status
SUCCESSclick to edit
prev_hash
438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6438fb3f6
this_hash ✓
15d151a815d151a815d151a815d151a815d151a815d151a815d151a815d151a8
✓ Chain intact — no tampering detected
Hash algorithm: djb2 × 9 rounds (64 hex) · Production path: SubtleCrypto.digest(‘SHA-256’) · No Polygon · No Hyperledger (yet) · IIE SBI GFF 2026