chainfactory.go

package interchaintest

import (
	_ "embed"
	"fmt"
	"os"
	"strings"
	"sync"

	"github.com/strangelove-ventures/interchaintest/v8/chain/cosmos"
	"github.com/strangelove-ventures/interchaintest/v8/chain/ethereum"
	"github.com/strangelove-ventures/interchaintest/v8/chain/penumbra"
	"github.com/strangelove-ventures/interchaintest/v8/chain/polkadot"
	"github.com/strangelove-ventures/interchaintest/v8/ibc"
	"go.uber.org/zap"
	"gopkg.in/yaml.v3"
)

// ChainFactory describes how to get chains for tests.
// This type currently supports a Pair method,
// but it may be expanded to a Triplet method in the future.
type ChainFactory interface {
	// Count reports how many chains this factory will produce from its Chains method.
	Count() int

	// Chains returns a set of chains.
	Chains(testName string) ([]ibc.Chain, error)

	// Name returns a descriptive name of the factory,
	// indicating all of its chains.
	// Depending on how the factory was configured,
	// this may report more than two chains.
	Name() string
}

// BuiltinChainFactory implements ChainFactory to return a fixed set of chains.
// Use NewBuiltinChainFactory to create an instance.
type BuiltinChainFactory struct {
	log *zap.Logger

	specs []*ChainSpec
}

//go:embed configuredChains.yaml
var embeddedConfiguredChains []byte

var logConfiguredChainsSourceOnce sync.Once

// initBuiltinChainConfig returns an ibc.ChainConfig mapping all configured chains
func initBuiltinChainConfig(log *zap.Logger) (map[string]ibc.ChainConfig, error) {
	var dat []byte
	var err error

	// checks if IBCTEST_CONFIGURED_CHAINS environment variable is set with a path,
	// otherwise, ./configuredChains.yaml gets embedded and used.
	val := os.Getenv("IBCTEST_CONFIGURED_CHAINS")

	if val != "" {
		dat, err = os.ReadFile(val)
		if err != nil {
			return nil, err
		}
	} else {
		dat = embeddedConfiguredChains
	}

	builtinChainConfigs := make(map[string]ibc.ChainConfig)

	err = yaml.Unmarshal(dat, &builtinChainConfigs)
	if err != nil {
		return nil, fmt.Errorf("error unmarshalling pre-configured chains: %w", err)
	}

	logConfiguredChainsSourceOnce.Do(func() {
		if val != "" {
			log.Info("Using user specified configured chains", zap.String("file", val))
		} else {
			log.Info("Using embedded configured chains")
		}
	})

	return builtinChainConfigs, nil
}

// NewBuiltinChainFactory returns a BuiltinChainFactory that returns chains defined by entries.
func NewBuiltinChainFactory(log *zap.Logger, specs []*ChainSpec) *BuiltinChainFactory {
	return &BuiltinChainFactory{log: log, specs: specs}
}

func (f *BuiltinChainFactory) Count() int {
	return len(f.specs)
}

func (f *BuiltinChainFactory) Chains(testName string) ([]ibc.Chain, error) {
	chains := make([]ibc.Chain, len(f.specs))
	for i, s := range f.specs {
		cfg, err := s.Config(f.log)
		if err != nil {
			// Prefer to wrap the error with the chain name if possible.
			if s.Name != "" {
				return nil, fmt.Errorf("failed to build chain config %s: %w", s.Name, err)
			}

			return nil, fmt.Errorf("failed to build chain config at index %d: %w", i, err)
		}

		chain, err := buildChain(f.log, testName, *cfg, s.NumValidators, s.NumFullNodes)
		if err != nil {
			return nil, err
		}
		chains[i] = chain
	}

	return chains, nil
}

const (
	defaultNumValidators = 2
	defaultNumFullNodes  = 1
)

func buildChain(log *zap.Logger, testName string, cfg ibc.ChainConfig, numValidators, numFullNodes *int) (ibc.Chain, error) {
	nv := defaultNumValidators
	if numValidators != nil {
		nv = *numValidators
	}
	nf := defaultNumFullNodes
	if numFullNodes != nil {
		nf = *numFullNodes
	}

	switch cfg.Type {
	case "cosmos":
		return cosmos.NewCosmosChain(testName, cfg, nv, nf, log), nil
	case "penumbra":
		return penumbra.NewPenumbraChain(log, testName, cfg, nv, nf), nil
	case "polkadot":
		// TODO Clean this up. RelayChain config should only reference cfg.Images[0] and parachains should iterate through the remaining
		// Maybe just pass everything in like NewCosmosChain and NewPenumbraChain, let NewPolkadotChain figure it out
		// Or parachains and ICS consumer chains maybe should be their own chain
		switch {
		case strings.Contains(cfg.Name, "composable"):
			parachains := []polkadot.ParachainConfig{{
				//Bin:             "composable",
				Bin:     "parachain-node",
				ChainID: "dev-2000",
				//ChainID:         "dali-dev",
				Image:           cfg.Images[1],
				NumNodes:        nf,
				Flags:           []string{"--execution=wasm", "--wasmtime-instantiation-strategy=recreate-instance-copy-on-write"},
				RelayChainFlags: []string{"--execution=wasm"},
			}}
			return polkadot.NewPolkadotChain(log, testName, cfg, nv, parachains), nil
		default:
			return nil, fmt.Errorf("unexpected error, unknown polkadot parachain: %s", cfg.Name)
		}
	case "ethereum":
		return ethereum.NewEthereumChain(testName, cfg, log), nil
	default:
		return nil, fmt.Errorf("unexpected error, unknown chain type: %s for chain: %s", cfg.Type, cfg.Name)
	}
}

func (f *BuiltinChainFactory) Name() string {
	parts := make([]string, len(f.specs))
	for i, s := range f.specs {
		// Ignoring error here because if we fail to generate the config,
		// another part of the factory stack should have failed properly before we got here.
		cfg, _ := s.Config(f.log)

		v := s.Version
		if v == "" {
			v = cfg.Images[0].Version
		}

		parts[i] = cfg.Name + "@" + v
	}
	return strings.Join(parts, "+")
}