Block categorization (#110)

* Add block categorization (is_final=)

* Add godo task for vulcanizeDB (Example of how everything could work together)

* Add unique constraint on block_number and node

* Add index on block_id for transactions_table

* Add node_id index on blocks table

* Sort transactions returned from FindBlock by tx_hash

* lowercase tx_to, tx_from like etherscan

db/migrations/1513613036_add_is_final_to_blocks.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE blocks
+    DROP COLUMN is_final;

db/migrations/1513613036_add_is_final_to_blocks.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE blocks
+    ADD COLUMN is_final BOOLEAN;

db/migrations/1513781105_add_unique_constraint_blocks_node.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE blocks
+  DROP CONSTRAINT node_id_block_number_uc;

db/migrations/1513781105_add_unique_constraint_blocks_node.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE blocks
+  ADD CONSTRAINT node_id_block_number_uc UNIQUE (block_number, node_id);

db/migrations/1513783615_add_block_id_index_on_transactions_table.down.sql

@@ -0,0 +1 @@
+DROP INDEX block_id_index;

db/migrations/1513783615_add_block_id_index_on_transactions_table.up.sql

@@ -0,0 +1 @@
+CREATE INDEX block_id_index ON transactions (block_id);

db/migrations/1513783944_add_node_id_index_on_blocks_table.down.sql

@@ -0,0 +1 @@
+DROP INDEX node_id_index;

db/migrations/1513783944_add_node_id_index_on_blocks_table.up.sql

@@ -0,0 +1 @@
+CREATE INDEX node_id_index ON blocks (node_id);

db/schema.sql

@@ -50,7 +50,8 @@ CREATE TABLE blocks (
     block_parenthash character varying(66),
     block_size bigint,
     uncle_hash character varying(66),
-    node_id integer NOT NULL
+    node_id integer NOT NULL,
+    is_final boolean
 );
 
 
@@ -283,6 +284,14 @@ ALTER TABLE ONLY logs
     ADD CONSTRAINT logs_pkey PRIMARY KEY (id);
 
 
+--
+-- Name: blocks node_id_block_number_uc; Type: CONSTRAINT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY blocks
+    ADD CONSTRAINT node_id_block_number_uc UNIQUE (block_number, node_id);
+
+
 --
 -- Name: nodes node_uc; Type: CONSTRAINT; Schema: public; Owner: -
 --
@@ -323,6 +332,13 @@ ALTER TABLE ONLY watched_contracts
     ADD CONSTRAINT watched_contracts_pkey PRIMARY KEY (contract_id);
 
 
+--
+-- Name: block_id_index; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX block_id_index ON transactions USING btree (block_id);
+
+
 --
 -- Name: block_number_index; Type: INDEX; Schema: public; Owner: -
 --
@@ -330,6 +346,13 @@ ALTER TABLE ONLY watched_contracts
 CREATE INDEX block_number_index ON blocks USING btree (block_number);
 
 
+--
+-- Name: node_id_index; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX node_id_index ON blocks USING btree (node_id);
+
+
 --
 -- Name: transactions blocks_fk; Type: FK CONSTRAINT; Schema: public; Owner: -
 --