Nest migrations under db directory

db/migrations/1508943247_create_blocks_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE public.blocks

db/migrations/1508943247_create_blocks_table.up.sql

@@ -0,0 +1,4 @@
+CREATE TABLE public.blocks
+(
+  block_number BIGINT
+)

db/migrations/1508965325_add_columns_to_blocks.down.sql

@@ -0,0 +1,5 @@
+ALTER TABLE blocks
+  DROP COLUMN block_gaslimit,
+  DROP COLUMN block_gasused,
+  DROP COLUMN block_time;
+

db/migrations/1508965325_add_columns_to_blocks.up.sql

@@ -0,0 +1,4 @@
+ALTER TABLE blocks
+  ADD COLUMN block_gaslimit DOUBLE PRECISION,
+  ADD COLUMN block_gasused DOUBLE PRECISION,
+  ADD COLUMN block_time DOUBLE PRECISION;

db/migrations/1509119369_initial_transaction_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE transactions

db/migrations/1509119369_initial_transaction_table.up.sql

@@ -0,0 +1,10 @@
+CREATE TABLE transactions
+(
+  id SERIAL PRIMARY KEY,
+  tx_hash VARCHAR(66),
+  tx_nonce NUMERIC,
+  tx_to varchar(66),
+  tx_gaslimit NUMERIC,
+  tx_gasprice NUMERIC,
+  tx_value NUMERIC
+)

db/migrations/1509391861_add_primary_key_to_blocks.down.sql

@@ -0,0 +1 @@
+ALTER TABLE blocks DROP id

db/migrations/1509391861_add_primary_key_to_blocks.up.sql

@@ -0,0 +1 @@
+ALTER TABLE blocks ADD COLUMN id SERIAL PRIMARY KEY

db/migrations/1509460207_add_block_id_to_transactions.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE transactions
+  DROP COLUMN block_id

db/migrations/1509460207_add_block_id_to_transactions.up.sql

@@ -0,0 +1,5 @@
+ALTER TABLE transactions
+  ADD COLUMN block_id INTEGER NOT NULL,
+  ADD CONSTRAINT fk_test
+  FOREIGN KEY (block_id)
+  REFERENCES blocks (id)

db/migrations/1509484288_add_block_index.down.sql

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

db/migrations/1509484288_add_block_index.up.sql

@@ -0,0 +1 @@
+CREATE INDEX block_number_index ON blocks (block_number);

db/migrations/1509633481_add_blocks_columns.down.sql

@@ -0,0 +1,7 @@
+ALTER TABLE blocks
+  Drop COLUMN block_difficulty,
+  Drop COLUMN block_hash,
+  drop COLUMN block_nonce,
+  drop COLUMN block_parenthash,
+  drop COLUMN block_size,
+  drop COLUMN uncle_hash

db/migrations/1509633481_add_blocks_columns.up.sql

@@ -0,0 +1,7 @@
+ALTER TABLE blocks
+  ADD COLUMN block_difficulty BIGINT,
+  ADD COLUMN block_hash VARCHAR(66),
+  ADD COLUMN block_nonce VARCHAR(20),
+  ADD COLUMN block_parenthash VARCHAR(66),
+  ADD COLUMN block_size BIGINT,
+  ADD COLUMN uncle_hash VARCHAR(66)