Add an index on block number for miner payments

alembic/versions/320e56b0a99f_add_index_on_block_number_for_miner_.py

@@ -0,0 +1,23 @@
+"""Add index on block_number for miner_payments
+
+Revision ID: 320e56b0a99f
+Revises: a02f3f2c469f
+Create Date: 2021-09-14 11:11:41.559137
+
+"""
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "320e56b0a99f"
+down_revision = "a02f3f2c469f"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_index("ix_block_number", "miner_payments", ["block_number"])
+
+
+def downgrade():
+    op.drop_index("ix_block_number", "miner_payments")