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package common
import (
"math/big"
ethCommon "github.com/ethereum/go-ethereum/common"
)
const (
// AuctionErrMsgCannotForge is the message returned in forge with the
// address cannot forge
AuctionErrMsgCannotForge = "HermezAuctionProtocol::forge: CANNOT_FORGE"
)
// AuctionConstants are the constants of the Rollup Smart Contract
type AuctionConstants struct {
// Blocks per slot
BlocksPerSlot uint8 `json:"blocksPerSlot"`
// Minimum bid when no one has bid yet
InitialMinimalBidding *big.Int `json:"initialMinimalBidding"`
// First block where the first slot begins
GenesisBlockNum int64 `json:"genesisBlockNum"`
// ERC777 token with which the bids will be made
TokenHEZ ethCommon.Address `json:"tokenHEZ"`
// HermezRollup smartcontract address
HermezRollup ethCommon.Address `json:"hermezRollup"`
// Hermez Governanze Token smartcontract address who controls some parameters and collects HEZ fee
GovernanceAddress ethCommon.Address `json:"governanceAddress"`
}
// SlotNum returns the slot number of a block number
func (c *AuctionConstants) SlotNum(blockNum int64) int64 {
if blockNum >= c.GenesisBlockNum {
return (blockNum - c.GenesisBlockNum) / int64(c.BlocksPerSlot)
}
return -1
}
// SlotBlocks returns the first and the last block numbers included in that slot
func (c *AuctionConstants) SlotBlocks(slotNum int64) (int64, int64) {
startBlock := c.GenesisBlockNum + slotNum*int64(c.BlocksPerSlot)
endBlock := startBlock + int64(c.BlocksPerSlot) - 1
return startBlock, endBlock
}
// RelativeBlock returns the relative block number within the slot where the
// block number belongs
func (c *AuctionConstants) RelativeBlock(blockNum int64) int64 {
slotNum := c.SlotNum(blockNum)
return blockNum - (c.GenesisBlockNum + (slotNum * int64(c.BlocksPerSlot)))
}
// AuctionVariables are the variables of the Auction Smart Contract
type AuctionVariables struct {
EthBlockNum int64 `meddler:"eth_block_num"`
// Donation Address
DonationAddress ethCommon.Address `meddler:"donation_address" validate:"required"`
// Boot Coordinator Address
BootCoordinator ethCommon.Address `meddler:"boot_coordinator" validate:"required"`
// Boot Coordinator URL
BootCoordinatorURL string `meddler:"boot_coordinator_url" validate:"required"`
// The minimum bid value in a series of 6 slots
DefaultSlotSetBid [6]*big.Int `meddler:"default_slot_set_bid,json" validate:"required"`
// SlotNum at which the new default_slot_set_bid applies
DefaultSlotSetBidSlotNum int64 `meddler:"default_slot_set_bid_slot_num"`
// Distance (#slots) to the closest slot to which you can bid ( 2 Slots = 2 * 40 Blocks = 20 min )
ClosedAuctionSlots uint16 `meddler:"closed_auction_slots" validate:"required"`
// Distance (#slots) to the farthest slot to which you can bid (30 days = 4320 slots )
OpenAuctionSlots uint16 `meddler:"open_auction_slots" validate:"required"`
// How the HEZ tokens deposited by the slot winner are distributed (Burn: 40% - Donation: 40% - HGT: 20%)
AllocationRatio [3]uint16 `meddler:"allocation_ratio,json" validate:"required"`
// Minimum outbid (percentage) over the previous one to consider it valid
Outbidding uint16 `meddler:"outbidding" validate:"required"`
// Number of blocks at the end of a slot in which any coordinator can forge if the winner has not forged one before
SlotDeadline uint8 `meddler:"slot_deadline" validate:"required"`
}
// Copy returns a deep copy of the Variables
func (v *AuctionVariables) Copy() *AuctionVariables {
vCpy := *v
for i := range v.DefaultSlotSetBid {
vCpy.DefaultSlotSetBid[i] = CopyBigInt(v.DefaultSlotSetBid[i])
}
return &vCpy
}