-- Assets represent tokens and coins
CREATE TABLE assets (
    id TEXT PRIMARY KEY,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    deleted_at TIMESTAMP,
    name TEXT NOT NULL,
    symbol TEXT NOT NULL,
    decimals INTEGER NOT NULL CHECK(decimals >= 0),
    chain_id TEXT NOT NULL,
    channel TEXT NOT NULL,
    asset_type TEXT NOT NULL,
    coingecko_id TEXT,
    UNIQUE(chain_id, symbol)
);

CREATE INDEX idx_assets_symbol ON assets(symbol);
CREATE INDEX idx_assets_chain_id ON assets(chain_id);
CREATE INDEX idx_assets_deleted_at ON assets(deleted_at);