68 lines
3.1 KiB
Python
68 lines
3.1 KiB
Python
 
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"""commit-reveal draw: round secret, participant order and draw height (B-73)
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Revision ID: d3e8b15a7c42
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Revises: b7d2e41c9a05
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Create Date: 2026-10-14 16:40:00.000000
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"""
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from typing import Sequence, Union
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from alembic import op
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import sqlalchemy as sa
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# revision identifiers, used by Alembic.
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revision: str = 'd3e8b15a7c42'
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down_revision: Union[str, Sequence[str], None] = 'b7d2e41c9a05'
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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_ACTIVE = "'open', 'closing', 'drawing', 'paying_out'"
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def upgrade() -> None:
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"""Upgrade schema.
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B-73 (DAT-61 … DAT-66): the round's secret (`server_seed_enc`, `server_seed`,
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`server_seed_hash`), the fixed participant list (`participants_hash`, `draw_height`,
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`round_participants.draw_position`) and the number of confirmations the draw block
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needs (`draw_confirmations` on the round, copied from `round_config` at open).
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`bet_vout` records which output of a bet pays the pool; every existing bet pays it
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with its first output.
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Rounds that already exist keep NULL in the three secret columns (they were drawn,
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or are drawn, on the block hash alone) and take the default of 3 confirmations.
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Plain add_column / create_index calls — never batch_alter_table, which on SQLite
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rebuilds the table and silently drops the expression indexes (B-97, DAT-56).
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"""
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op.add_column("rounds", sa.Column("draw_confirmations", sa.Integer(), server_default="3", nullable=False))
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op.add_column("rounds", sa.Column("server_seed_enc", sa.Text(), nullable=True))
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op.add_column("rounds", sa.Column("server_seed", sa.String(length=64), nullable=True))
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op.add_column("rounds", sa.Column("server_seed_hash", sa.String(length=64), nullable=True))
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op.add_column("rounds", sa.Column("participants_hash", sa.String(length=64), nullable=True))
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op.add_column("rounds", sa.Column("draw_height", sa.Integer(), nullable=True))
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op.add_column("round_participants", sa.Column("bet_vout", sa.Integer(), server_default="0", nullable=False))
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op.add_column("round_participants", sa.Column("draw_position", sa.Integer(), nullable=True))
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op.create_index(
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"ux_round_participants_round_draw_position",
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"round_participants",
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["round_id", "draw_position"],
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unique=True,
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)
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op.add_column("round_config", sa.Column("draw_confirmations", sa.Integer(), server_default="3", nullable=False))
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def downgrade() -> None:
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"""Downgrade schema."""
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op.drop_column("round_config", "draw_confirmations")
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op.drop_index("ux_round_participants_round_draw_position", table_name="round_participants")
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op.drop_column("round_participants", "draw_position")
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op.drop_column("round_participants", "bet_vout")
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for column in ("draw_height", "participants_hash", "server_seed_hash", "server_seed", "server_seed_enc", "draw_confirmations"):
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op.drop_column("rounds", column)
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# drop_column on SQLite is a table rebuild: recreate the expression index (B-97).
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op.execute("DROP INDEX IF EXISTS ix_rounds_single_active")
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op.execute(f"CREATE UNIQUE INDEX ix_rounds_single_active ON rounds ((1)) WHERE status IN ({_ACTIVE})")
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