'use strict';
module.exports = (sequelize, DataTypes) => {
  const Block = sequelize.define('Block', {
    height: {
      type: DataTypes.INTEGER.UNSIGNED,
      primaryKey: true,
    },
    hash: DataTypes.STRING(64),
    size: DataTypes.MEDIUMINT.UNSIGNED,
    version: DataTypes.TINYINT.UNSIGNED,
    merkleroot: DataTypes.STRING(64),
    time: DataTypes.DATE,
    nonce: DataTypes.BIGINT.UNSIGNED,
    bits: DataTypes.STRING(8),
    difficulty: DataTypes.DECIMAL(16, 8).UNSIGNED,
    hashrate: DataTypes.BIGINT.UNSIGNED,
    previousblockhash: DataTypes.STRING(64),
    nextblockhash: DataTypes.STRING(64),
  }, {
    timestamps: false,
    indexes: [{
      unique: true,
      fields: ['hash', 'height']
    }],
    freezeTableName: true,
  });

  Block.associate = function(models) {
    models.Block.hasMany(models.Transaction);
  };

  return Block;
};