updated default chunk size

README.md

@@ -142,14 +142,22 @@ Node 1:
 
 1. go run cmd/dc4bc_d/main.go gen_keys --username node_1 --key_store_dbdsn /tmp/dc4bc_node_1_key_store
 2. go run cmd/dc4bc_d/main.go start --username node_1 --key_store_dbdsn /tmp/dc4bc_node_1_key_store --listen_addr localhost:8080 --state_dbdsn /tmp/dc4bc_node_1_state --storage_dbdsn /tmp/dc4bc_storage
+3. go run cmd/dc4bc_cli/main.go get_address --listen_addr localhost:8080
+4. go run cmd/airgapped/main.go /tmp/dc4bc_node_1_airgapped_state
 
 Node 2:
 
 1. go run cmd/dc4bc_d/main.go gen_keys --username node_2 --key_store_dbdsn /tmp/dc4bc_node_2_key_store
 2. go run cmd/dc4bc_d/main.go start --username node_2 --key_store_dbdsn /tmp/dc4bc_node_2_key_store --listen_addr localhost:8081 --state_dbdsn /tmp/dc4bc_node_2_state --storage_dbdsn /tmp/dc4bc_storage
+3. go run cmd/dc4bc_cli/main.go get_address --listen_addr localhost:8080
+4. go run cmd/airgapped/main.go /tmp/dc4bc_node_2_airgapped_state
 
 #### Start the DKG
 
 1. go run cmd/dc4bc_cli/main.go get_address --listen_addr localhost:8080
 2. go run cmd/dc4bc_cli/main.go get_address --listen_addr localhost:8081
 3. go run cmd/dc4bc_cli/main.go start_dkg 2 2 --listen_addr localhost:8080
+
+#### Perform required operations for both nodes
+
+1. go run cmd/dc4bc_cli/main.go get_operations --listen_addr localhost:8080

client/client.go

@@ -259,7 +259,7 @@ func (c *Client) GetOperationQRPath(operationID string) ([]string, error) {
 		return nil, fmt.Errorf("failed to get operation in JSON: %w", err)
 	}
 
-	operationQRPath := filepath.Join(QrCodesDir, operationID)
+	operationQRPath := filepath.Join(QrCodesDir, fmt.Sprintf("qr_dc4bc_%s", operationID))
 	chunks, err := qr.DataToChunks(operationJSON)
 	if err != nil {
 		return nil, fmt.Errorf("failed to divide a data on chunks: %w", err)

qr/chunk.go

@@ -7,7 +7,7 @@ import (
 	"math"
 )
 
-const chunkSize = 1024
+const chunkSize = 512
 
 type chunk struct {
 	Data    []byte