Initial commit: smart contract templates for bash, go, python, and typescript

bash/process.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+# =============================================================================
+# Smart Contract Processing Logic
+#
+# This file contains the transaction processing logic for your smart contract.
+# Modify this script to implement your business logic.
+#
+# Input:
+#   $1          - Transaction JSON string
+#   Environment - Server env vars and secrets are exported as environment variables
+#
+# Output (stdout):
+#   A JSON object with the following fields:
+#   {
+#     "data": { ... },           // Your result data (any JSON object)
+#     "output_to_chain": true,   // Whether to persist the result on chain
+#     "error": ""                // Error message (empty string if no error)
+#   }
+#
+# Logs (stderr):
+#   Anything written to stderr is captured and sent back as logs.
+#
+# Exit code:
+#   0 = success (stdout is parsed as JSON result)
+#   non-zero = error (stderr is used as the error message)
+# =============================================================================
+
+set -euo pipefail
+
+# Transaction JSON is passed as the first argument
+TX_JSON="$1"
+
+# =============================================================================
+# TODO: Implement your smart contract logic here
+# =============================================================================
+#
+# Parse transaction fields using jq:
+#   TXN_ID=$(echo "$TX_JSON" | jq -r '.header.txn_id')
+#   TXN_TYPE=$(echo "$TX_JSON" | jq -r '.header.txn_type')
+#   PAYLOAD=$(echo "$TX_JSON" | jq '.payload')
+#
+# Access environment variables (set by the server):
+#   echo "Smart Contract Name: $SMART_CONTRACT_NAME" >&2
+#   echo "Dragonchain ID: $DRAGONCHAIN_ID" >&2
+#
+# Access secrets (set by the server):
+#   MY_SECRET="${SC_SECRET_MY_SECRET:-}"
+#
+# Process based on payload action:
+#   ACTION=$(echo "$TX_JSON" | jq -r '.payload.action // empty')
+#   case "$ACTION" in
+#     create)
+#       # Handle create operation
+#       ;;
+#     update)
+#       # Handle update operation
+#       ;;
+#     *)
+#       echo '{"data": null, "output_to_chain": false, "error": "Unknown action: '"$ACTION"'"}'
+#       exit 0
+#       ;;
+#   esac
+#
+# Log messages to stderr (captured and sent back with response):
+#   echo "Processing transaction..." >&2
+
+# Parse transaction data
+TXN_ID=$(echo "$TX_JSON" | jq -r '.header.txn_id')
+TXN_TYPE=$(echo "$TX_JSON" | jq -r '.header.txn_type')
+PAYLOAD=$(echo "$TX_JSON" | jq -c '.payload')
+
+echo "Processing transaction $TXN_ID (type: $TXN_TYPE)" >&2
+
+# Default implementation: echo back the transaction
+jq -n \
+  --arg txn_id "$TXN_ID" \
+  --arg txn_type "$TXN_TYPE" \
+  --argjson payload "$PAYLOAD" \
+  '{
+    "data": {
+      "status": "processed",
+      "transaction_id": $txn_id,
+      "txn_type": $txn_type,
+      "payload": $payload,
+      "message": "Transaction processed successfully"
+    },
+    "output_to_chain": true,
+    "error": ""
+  }'