defs: add blockbook field to build_coins script

defs/coins/zencash.json

@@ -34,5 +34,6 @@
 	"max_address_length": 95,
 	"bitcore": [
 		"https://explorer.zen-solutions.io"
-	]
-}
+	],
+	"blockbook": []
+}

protob/types.proto

@@ -187,8 +187,8 @@ message TxInputType {
 	optional uint64 amount = 8;						// amount of previous transaction output (for segwit only)
 	optional uint32 decred_tree = 9;
 	optional uint32 decred_script_version = 10;
-	optional bytes prev_block_hash_bip115 = 11;     //block hash of previous transaction output (for bip115 implementation)
-	optional bytes prev_block_height_bip115 = 12;	//block height of previous transaction output (for bip115 implementation)
+	optional bytes prev_block_hash_bip115 = 11;				// block hash of previous transaction output (for bip115 implementation)
+	optional bytes prev_block_height_bip115 = 12;				// block height of previous transaction output (for bip115 implementation)
 }
 
 /**
@@ -204,8 +204,8 @@ message TxOutputType {
 	optional MultisigRedeemScriptType multisig = 5; // defines multisig address; script_type must be PAYTOMULTISIG
 	optional bytes op_return_data = 6;		// defines op_return data; script_type must be PAYTOOPRETURN, amount must be 0
 	optional uint32 decred_script_version = 7;
-	optional bytes block_hash_bip115 = 8;    //block hash of existing block (recommended current_block - 300) (for bip115 implementation)
-	optional bytes block_height_bip115 = 9;	 //block height of existing block (recommended current_block - 300) (for bip115 implementation)
+	optional bytes block_hash_bip115 = 8;		// block hash of existing block (recommended current_block - 300) (for bip115 implementation)
+	optional bytes block_height_bip115 = 9;		// block height of existing block (recommended current_block - 300) (for bip115 implementation)
 }
 
 /**

tools/build_coins.py

@@ -100,6 +100,9 @@ def validate_coin(coin):
     assert check_type(coin['bitcore'], list, empty=True)
     for bc in coin['bitcore']:
         assert not bc.endswith('/')
+    assert check_type(coin['blockbook'], list, empty=True)
+    for bb in coin['blockbook']:
+        assert not bb.endswith('/')
 
 
 def validate_icon(icon):
@@ -160,9 +163,9 @@ def convert_icon(icon):
 def process_json(fn):
     print(os.path.basename(fn), end=' ... ')
     j = json.load(open(fn))
+    validate_coin(j)
     if BUILD_DEFS:
         i = Image.open(fn.replace('.json', '.png'))
-        validate_coin(j)
         validate_icon(i)
         ser = serialize(j, convert_icon(i))
         sig = sign(ser)