Add SV2 DATUM payout hardening

.env.example

@@ -40,6 +40,20 @@ STRATUM_TCP_KEEPALIVE_INITIAL_DELAY_MS=60000
 #SV2_DIFFICULTY_CHECK_INTERVAL_MS=60000
 #STRATUM_V2_SOCKET_TIMEOUT_MS=3600000
 #SV2_AUTHORITY_PRIVKEY=
+#SV2_JDP_PORTS=
+#SV2_JDP_POOL_PAYOUT_ADDRESS=
+#SV2_JDP_TOKEN_TTL_MS=600000
+#SV2_TDP_PORTS=
+#SV2_TDP_POOL_PAYOUT_ADDRESS=
+
+# Optional DATUM Prime-compatible listener. DATUM_POOL_PAYOUT_ADDRESS is the
+# required pool coinbase output DATUM gateways must include in custom templates.
+#DATUM_PORTS=
+#DATUM_POOL_PAYOUT_ADDRESS=
+#DATUM_SHARE_DIFFICULTY=1
+# 32-byte hex seed for the DATUM server identity key. DATUM clients must be
+# configured with the matching logged public key.
+#DATUM_IDENTITY_SEED=
 
 STRATUM_SECURE=true
 SECURE_STRATUM_PORTS=4333,4332,4331,4330
@@ -82,6 +96,19 @@ SHARE_ROLLUP_INTERVAL_MS=60000
 SHARE_ROLLUP_SAFETY_LAG_SECONDS=30
 SHARE_ROLLUP_MAX_SHARES_PER_BATCH=5000000
 
+# payout snapshot accounting
+PAYOUT_SNAPSHOT_ENABLED=true
+PAYOUT_METHOD=pplns
+PAYOUT_WINDOW_FACTOR=4
+# solo preserves current one-address coinbase payouts. Set to snapshot to pay
+# the latest payout snapshot directly in coinbase outputs.
+PAYOUT_COINBASE_MODE=solo
+PAYOUT_MAX_COINBASE_OUTPUTS=10
+PAYOUT_MIN_OUTPUT_SATS=546
+PAYOUT_FEE_ADDRESS=
+PAYOUT_FEE_PERCENT=0
+PAYOUT_COINBASE_WEIGHT_BUDGET=50000
+
 #redis
 REDIS_URL=redis://redis:6379