* SEB Fiscal Settlement Adapter (RPG/ILE) * Generated from: SEB_SOVEREIGN_EVENT_BUS_MASTER_SPECIFICATION.xml * Version: 1.0.0 * Layer: L4 - Mainframe Integration (IBM i) * * This module implements the settlement gateway for fiscal operations, * routing events from the Codestorm Hub RPC interface through the * Sovereign Event Bus to immutable ledger persistence. * * Entry Points: * - SEB_Fiscal_Settlement: Main RPC endpoint * - SEB_Settlement_Confirm: Emit confirmation event * - SEB_Settlement_Error: Handle settlement failures * * Cryptography: Blake3 + Ed25519 (via WORM_SEAL module) * Database: DB2 (SOVEREIGN_LEDGER table) * Idempotency: Via Bifrost_Hash deduplication * * Thread Safety: All operations are single-threaded per agent * Multiple agents can settle in parallel H DFTACTGRP(*NO) H BNDDIR('QSys/ProdData/HTTP/Public/WebSphere' H 'QSys/ProdData/HTTP/Public/ibm-http-server') H ACTGRP('*CALLER') H OPTION(*SRCSTMT:*NODEBUGIO) H TIMELIMIT(600) * 10 minute timeout for settlement /?COPY SEBEVENT /?COPY QSYSINC/H,STRING_H * ================================================================ * Global Variables * ================================================================ D g_seb_chain_offset S 10I 0 INZ(0) D g_bifrost_hash S 128A INZ('') D g_agent_id S 16A INZ('FISCAL_SETTLE') D g_settlement_error S 1A INZ('0') * ================================================================ * Codestorm Hub RPC Entry Point * ================================================================ * Called by: Codestorm Hub (RELAY adapter) * Input: Agent_ID, Amount, Asset_ID, Bifrost_Hash * Output: Settlement Confirmation Event or Error * * This is the main entry point for settlement requests from the hub P SEB_Fiscal_Settlement... P B EXPORT D SEB_Fiscal_Settlement... D PI D pi_agent_id 16A CONST D pi_amount 18P 0 CONST D pi_asset_id 32A CONST D pi_bifrost_hash 128A CONST D po_settlement_id 128A D po_error_msg 256A D l_envelope DS QUALIFIED D sb_offset 1 8I 0 D sb_timestamp 9 34A D sb_agent_id 35 50A D sb_event_type 51 60A D sb_payload_size 61 64I 0 D sb_reserved 65 76A D sb_prev_hash 77 108A D sb_event_hash 109 140A D sb_signature 141 204A D l_payload S 2048A VARYING D l_seb_offset S 10I 0 D l_error_code S 10I 0 D l_settlement_payload S 2048A VARYING D l_timestamp S 26A D l_hash S 64A D l_hash_obj S 16A D l_hash_result S 32A D l_json_buffer S 4096A VARYING BEGIN * Validate inputs IF pi_amount <= 0; po_error_msg = 'SEB_FISCAL_ADAPTER: Settlement amount must be ' + 'positive'; RETURN; ENDIF; IF pi_bifrost_hash = ''; po_error_msg = 'SEB_FISCAL_ADAPTER: Bifrost_Hash required for ' + 'idempotency'; RETURN; ENDIF; * Check for duplicate settlement (idempotency) EXSR check_duplicate_settlement; IF g_settlement_error = '1'; po_error_msg = 'SEB_FISCAL_ADAPTER: Settlement already processed ' + 'for this Bifrost_Hash'; RETURN; ENDIF; * Generate timestamp (ISO-8601 UTC) EXSR generate_iso_timestamp; * Build settlement event payload (JSON format) EXSR build_settlement_payload; * Build SEB envelope header l_envelope.sb_offset = 0; * Will be assigned by SEB kernel l_envelope.sb_timestamp = l_timestamp; l_envelope.sb_agent_id = g_agent_id; l_envelope.sb_event_type = 'SETTLEMENT'; l_envelope.sb_payload_size = %LEN(%TRIM(l_settlement_payload)); l_envelope.sb_reserved = ''; * Append event to SEB chain (WORM sealed) EXSR append_to_seb_chain; IF l_error_code <> 0; po_error_msg = 'SEB_FISCAL_ADAPTER: Failed to append event to ' + 'SEB chain (error code: ' + %CHAR(l_error_code) + ')'; RETURN; ENDIF; * Insert settlement into SOVEREIGN_LEDGER (idempotent on Bifrost_Hash) EXSR insert_into_ledger; IF l_error_code <> 0; po_error_msg = 'SEB_FISCAL_ADAPTER: Failed to insert into ' + 'SOVEREIGN_LEDGER (error code: ' + %CHAR(l_error_code) + ')'; RETURN; ENDIF; * Emit Settlement Confirmation Event back into SEB EXSR emit_confirmation_event; IF l_error_code <> 0; po_error_msg = 'SEB_FISCAL_ADAPTER: Failed to emit confirmation ' + 'event (error code: ' + %CHAR(l_error_code) + ')'; RETURN; ENDIF; * Call SEB_Kernel_Append_Event NIF to register confirmation EXSR call_seb_kernel_nif; * Return settlement ID (which is the SEB offset) po_settlement_id = %CHAR(l_seb_offset); po_error_msg = 'SUCCESS'; END-PROC SEB_Fiscal_Settlement; * ================================================================ * SUBROUTINE: Check for Duplicate Settlement * ================================================================ C check_duplicate_settlement... C BEGSR D l_ledger_status S 1 D l_ledger_offset S 10I 0 D l_sqlcode S 5I 0 * Query SOVEREIGN_LEDGER for existing settlement with this Bifrost_Hash EXEC SQL SELECT SETTLEMENT_STATUS, SEB_OFFSET INTO :l_ledger_status, :l_ledger_offset FROM SOVEREIGN_LEDGER WHERE BIFROST_HASH = :pi_bifrost_hash AND SETTLEMENT_STATUS IN ('SUCCESS', 'PENDING') FETCH FIRST 1 ROW ONLY; l_sqlcode = SQLCODE; IF l_sqlcode = 0; * Settlement already exists g_settlement_error = '1'; g_seb_chain_offset = l_ledger_offset; ELSE; * No duplicate found g_settlement_error = '0'; ENDIF; C ENDSR; * ================================================================ * SUBROUTINE: Generate ISO-8601 Timestamp * ================================================================ C generate_iso_timestamp... C BEGSR D l_now S Z INZ(*SYS) D l_year S 4 0 D l_month S 2 0 D l_day S 2 0 D l_hour S 2 0 D l_minute S 2 0 D l_second S 2 0 D l_millis S 3 0 * Get current time in UTC l_now = %TIMESTAMP(); * Extract components l_year = %YEAR(l_now); l_month = %MONTH(l_now); l_day = %DAY(l_now); l_hour = %HOUR(l_now); l_minute = %MINUTE(l_now); l_second = %SECOND(l_now); l_millis = %MILLISECOND(l_now); * Format: YYYY-MM-DDTHH:MM:SS.sssZ l_timestamp = %EDITC(l_year : '0 ') + '-' + %EDITC(l_month : '0 ') + '-' + %EDITC(l_day : '0 ') + 'T' + %EDITC(l_hour : '0 ') + ':' + %EDITC(l_minute : '0 ') + ':' + %EDITC(l_second : '0 ') + '.' + %EDITC(l_millis : '0 ') + 'Z'; C ENDSR; * ================================================================ * SUBROUTINE: Build Settlement Payload (JSON) * ================================================================ C build_settlement_payload... C BEGSR * Build JSON payload with settlement details l_settlement_payload = '{' + '"intent": {' + '"action": "settle_fiscal",' + '"subject": "' + %TRIM(pi_asset_id) + '",' + '"parameters": {' + '"amount": ' + %CHAR(pi_amount) + ',' + '"currency": "USD"' + '}' + '},' + '"context": {' + '"environment": "production",' + '"constraints": {' + '"network": "restricted",' + '"max_runtime_ms": 30000,' + '"max_memory_bytes": 10485760' + '}' + '},' + '"authority": {' + '"principal": "' + %TRIM(pi_agent_id) + '",' + '"credentials": {' + '"credential_type": "agent_signature"' + '},' + '"scope": ["settle_fiscal"]' + '},' + '"evidence": [' + '{' + '"evidence_type": "bifrost_hash",' + '"hash": "' + %TRIM(pi_bifrost_hash) + '"' + '}' + ']' + '}'; C ENDSR; * ================================================================ * SUBROUTINE: Append Event to SEB Chain (WORM Sealed) * ================================================================ C append_to_seb_chain... C BEGSR * Call SEB_Append_Event NIF (external interface) * The kernel handles cryptographic sealing via Blake3+Ed25519 CALL 'SEB_APPEND' PARM l_envelope PARM l_settlement_payload PARM l_seb_offset PARM l_error_code; C ENDSR; * ================================================================ * SUBROUTINE: Insert into SOVEREIGN_LEDGER (Idempotent) * ================================================================ C insert_into_ledger... C BEGSR D l_sqlcode S 5I 0 D l_settlement_id S 128A D l_timestamp_ins S Z l_timestamp_ins = %TIMESTAMP(); l_settlement_id = %CHAR(l_seb_offset); * Attempt INSERT (will fail if Bifrost_Hash exists) * Use INSERT IGNORE or ON CONFLICT behavior for idempotency EXEC SQL INSERT INTO SOVEREIGN_LEDGER ( SETTLEMENT_ID, BIFROST_HASH, AGENT_ID, AMOUNT, ASSET_ID, SEB_OFFSET, SETTLEMENT_STATUS, CREATED_AT, UPDATED_AT, EVENT_HASH, SIGNATURE ) VALUES ( :l_settlement_id, :pi_bifrost_hash, :pi_agent_id, :pi_amount, :pi_asset_id, :l_seb_offset, 'SUCCESS', :l_timestamp_ins, :l_timestamp_ins, :l_hash, '' ) ON CONFLICT (BIFROST_HASH) DO NOTHING; l_sqlcode = SQLCODE; IF l_sqlcode <> 0 AND l_sqlcode <> 100; * SQL error occurred (not "no rows found") l_error_code = l_sqlcode; ELSE; * Either inserted successfully or already existed (idempotency) l_error_code = 0; ENDIF; C ENDSR; * ================================================================ * SUBROUTINE: Emit Settlement Confirmation Event * ================================================================ C emit_confirmation_event... C BEGSR D l_conf_envelope DS QUALIFIED D sb_offset 1 8I 0 D sb_timestamp 9 34A D sb_agent_id 35 50A D sb_event_type 51 60A D sb_payload_size 61 64I 0 D sb_reserved 65 76A D sb_prev_hash 77 108A D sb_event_hash 109 140A D sb_signature 141 204A D l_conf_payload S 1024A VARYING * Build confirmation event payload l_conf_payload = '{' + '"settlement_id": "' + %TRIM(l_settlement_id) + '",' + '"bifrost_hash": "' + %TRIM(pi_bifrost_hash) + '",' + '"status": "CONFIRMED",' + '"seb_offset": ' + %CHAR(l_seb_offset) + '}'; * Build confirmation envelope l_conf_envelope.sb_offset = 0; l_conf_envelope.sb_timestamp = l_timestamp; l_conf_envelope.sb_agent_id = g_agent_id; l_conf_envelope.sb_event_type = 'CONFIRM'; l_conf_envelope.sb_payload_size = %LEN(%TRIM(l_conf_payload)); l_conf_envelope.sb_reserved = ''; * Append confirmation to SEB chain CALL 'SEB_APPEND' PARM l_conf_envelope PARM l_conf_payload PARM g_seb_chain_offset PARM l_error_code; C ENDSR; * ================================================================ * SUBROUTINE: Call SEB_Kernel_Append_Event NIF * ================================================================ C call_seb_kernel_nif... C BEGSR * This subroutine would call the native interface to the Rust kernel * For now, it's a placeholder - the actual NIF would be loaded * via CALL 'SEB_KERNEL_NIF' with appropriate parameters * The kernel is responsible for: * 1. Final Blake3 hash verification * 2. Ed25519 signature validation * 3. Chain integrity checks * 4. Conflict resolution for parallel appends l_error_code = 0; * Assume success for now C ENDSR; * ================================================================ * Exported Procedure: Settlement Error Handler * ================================================================ P SEB_Settlement_Error... P B EXPORT D SEB_Settlement_Error... D PI D pi_settlement_id 128A CONST D pi_error_code 5I 0 CONST D pi_error_msg 512A CONST D po_retry_offset 10I 0 D l_error_envelope DS QUALIFIED D sb_offset 1 8I 0 D sb_timestamp 9 34A D sb_agent_id 35 50A D sb_event_type 51 60A D sb_payload_size 61 64I 0 D sb_reserved 65 76A D sb_prev_hash 77 108A D sb_event_hash 109 140A D sb_signature 141 204A D l_error_payload S 1024A VARYING D l_seb_offset S 10I 0 D l_error_seb S 10I 0 BEGIN * Build error event payload l_error_payload = '{' + '"settlement_id": "' + %TRIM(pi_settlement_id) + '",' + '"error_code": ' + %CHAR(pi_error_code) + ',' + '"error_msg": "' + %TRIM(pi_error_msg) + '",' + '"timestamp": "' + l_timestamp + '"' + '}'; * Build error envelope l_error_envelope.sb_event_type = 'ERROR'; l_error_envelope.sb_agent_id = g_agent_id; * Append error event to SEB CALL 'SEB_APPEND' PARM l_error_envelope PARM l_error_payload PARM l_seb_offset PARM l_error_seb; * Return offset for retry tracking po_retry_offset = l_seb_offset; END-PROC SEB_Settlement_Error; * ================================================================ * End of Module * ================================================================