Add indexes to columns used in plugin joins

- Will probably want to update these depending on what's commonly used
  in join/where statements.

db/migrations/00023_create_headers_table.sql

@@ -12,9 +12,14 @@ CREATE TABLE public.headers
     UNIQUE (block_number, hash, eth_node_fingerprint)
 );
 
--- Index is removed when table is
-CREATE INDEX headers_block_number ON public.headers (block_number);
+CREATE INDEX headers_block_number
+    ON public.headers (block_number);
 
+CREATE INDEX headers_block_timestamp
+    ON public.headers (block_timestamp);
 
 -- +goose Down
+DROP INDEX public.headers_block_number;
+DROP INDEX public.headers_block_timestamp;
+
 DROP TABLE public.headers;

db/migrations/00026_create_header_sync_transactions_table.sql

@@ -1,19 +1,29 @@
 -- +goose Up
-CREATE TABLE header_sync_transactions (
-  id          SERIAL PRIMARY KEY,
-  header_id   INTEGER NOT NULL REFERENCES headers(id) ON DELETE CASCADE,
-  hash        VARCHAR(66),
-  gas_limit   NUMERIC,
-  gas_price   NUMERIC,
-  input_data  BYTEA,
-  nonce       NUMERIC,
-  raw         BYTEA,
-  tx_from     VARCHAR(44),
-  tx_index    INTEGER,
-  tx_to       VARCHAR(44),
-  "value"     NUMERIC,
-  UNIQUE (header_id, hash)
+CREATE TABLE public.header_sync_transactions
+(
+    id         SERIAL PRIMARY KEY,
+    header_id  INTEGER NOT NULL REFERENCES headers (id) ON DELETE CASCADE,
+    hash       VARCHAR(66),
+    gas_limit  NUMERIC,
+    gas_price  NUMERIC,
+    input_data BYTEA,
+    nonce      NUMERIC,
+    raw        BYTEA,
+    tx_from    VARCHAR(44),
+    tx_index   INTEGER,
+    tx_to      VARCHAR(44),
+    "value"    NUMERIC,
+    UNIQUE (header_id, hash)
 );
 
+CREATE INDEX header_sync_transactions_header
+    ON public.header_sync_transactions (header_id);
+
+CREATE INDEX header_sync_transactions_tx_index
+    ON public.header_sync_transactions (tx_index);
+
 -- +goose Down
+DROP INDEX public.header_sync_transactions_header;
+DROP INDEX public.header_sync_transactions_tx_index;
+
 DROP TABLE header_sync_transactions;

db/migrations/00027_create_header_sync_receipts_table.sql

@@ -14,6 +14,14 @@ CREATE TABLE header_sync_receipts
     UNIQUE (header_id, transaction_id)
 );
 
+CREATE INDEX header_sync_receipts_header
+    ON public.header_sync_receipts (header_id);
+
+CREATE INDEX header_sync_receipts_transaction
+    ON public.header_sync_receipts (transaction_id);
 
 -- +goose Down
+DROP INDEX public.header_sync_receipts_header;
+DROP INDEX public.header_sync_receipts_transaction;
+
 DROP TABLE header_sync_receipts;