drand.go

package buildconstants

import (
	"sort"

	"github.com/filecoin-project/go-state-types/abi"
)

type DrandEnum int

const (
	DrandMainnet DrandEnum = iota + 1
	DrandTestnet
	_ // kept to retain iota numbering, used to be Devnet
	_ // kept to retain iota numbering, used to be Localnet
	DrandIncentinet
	DrandQuicknet
)

type DrandConfig struct {
	Servers       []string
	Relays        []string
	ChainInfoJSON string
	IsChained     bool // Prior to Drand quicknet, beacons form a chain, post quicknet they do not (FIP-0063)
}

type DrandPoint struct {
	Start  abi.ChainEpoch
	Config DrandConfig
}

var DrandConfigs = map[DrandEnum]DrandConfig{
	DrandQuicknet: {
		Servers: []string{
			"https://api.drand.sh",
			"https://api2.drand.sh",
			"https://api3.drand.sh",
			"https://drand.cloudflare.com",
			"https://api.drand.secureweb3.com:6875", // Storswift
		},
		Relays: []string{
			"/dnsaddr/api.drand.sh/",
			"/dnsaddr/api2.drand.sh/",
			"/dnsaddr/api3.drand.sh/",
		},
		IsChained:     false,
		ChainInfoJSON: `{"public_key":"83cf0f2896adee7eb8b5f01fcad3912212c437e0073e911fb90022d3e760183c8c4b450b6a0a6c3ac6a5776a2d1064510d1fec758c921cc22b0e17e63aaf4bcb5ed66304de9cf809bd274ca73bab4af5a6e9c76a4bc09e76eae8991ef5ece45a","period":3,"genesis_time":1692803367,"hash":"52db9ba70e0cc0f6eaf7803dd07447a1f5477735fd3f661792ba94600c84e971","groupHash":"f477d5c89f21a17c863a7f937c6a6d15859414d2be09cd448d4279af331c5d3e","schemeID":"bls-unchained-g1-rfc9380","metadata":{"beaconID":"quicknet"}}`,
	},
	DrandTestnet: {
		Servers: []string{
			"https://pl-eu.testnet.drand.sh",
			"https://pl-us.testnet.drand.sh",
		},
		Relays: []string{
			"/dnsaddr/pl-eu.testnet.drand.sh/",
			"/dnsaddr/pl-us.testnet.drand.sh/",
		},
		IsChained:     true,
		ChainInfoJSON: `{"public_key":"922a2e93828ff83345bae533f5172669a26c02dc76d6bf59c80892e12ab1455c229211886f35bb56af6d5bea981024df","period":25,"genesis_time":1590445175,"hash":"84b2234fb34e835dccd048255d7ad3194b81af7d978c3bf157e3469592ae4e02","groupHash":"4dd408e5fdff9323c76a9b6f087ba8fdc5a6da907bd9217d9d10f2287d081957"}`,
	},

	// legacy randomness sources, their ChainInfo must remain here forever
	// to allow validating randomness from past epochs
	DrandIncentinet: {
		IsChained:     true,
		ChainInfoJSON: `{"public_key":"8cad0c72c606ab27d36ee06de1d5b2db1faf92e447025ca37575ab3a8aac2eaae83192f846fc9e158bc738423753d000","period":30,"genesis_time":1595873820,"hash":"80c8b872c714f4c00fdd3daa465d5514049f457f01f85a4caf68cdcd394ba039","groupHash":"d9406aaed487f7af71851b4399448e311f2328923d454e971536c05398ce2d9b"}`,
	},
	DrandMainnet: {
		IsChained:     true,
		ChainInfoJSON: `{"public_key":"868f005eb8e6e4ca0a47c8a77ceaa5309a47978a7c71bc5cce96366b5d7a569937c529eeda66c7293784a9402801af31","period":30,"genesis_time":1595431050,"hash":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","groupHash":"176f93498eac9ca337150b46d21dd58673ea4e3581185f869672e59fa4cb390a"}`,
	},
}

func DrandConfigSchedule() []DrandPoint {
	out := make([]DrandPoint, 0, len(DrandSchedule))
	for start, network := range DrandSchedule {
		out = append(out, DrandPoint{Start: start, Config: DrandConfigs[network]})
	}

	sort.Slice(out, func(i, j int) bool {
		return out[i].Start < out[j].Start
	})

	return out
}