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chain_set.go
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chain_set.go
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package evm
import (
"context"
"fmt"
"math"
"math/big"
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/pkg/errors"
"github.com/smartcontractkit/sqlx"
"go.uber.org/multierr"
evmclient "github.com/smartcontractkit/chainlink/core/chains/evm/client"
httypes "github.com/smartcontractkit/chainlink/core/chains/evm/headtracker/types"
"github.com/smartcontractkit/chainlink/core/chains/evm/log"
"github.com/smartcontractkit/chainlink/core/chains/evm/txmgr"
"github.com/smartcontractkit/chainlink/core/chains/evm/types"
evmtypes "github.com/smartcontractkit/chainlink/core/chains/evm/types"
"github.com/smartcontractkit/chainlink/core/config"
"github.com/smartcontractkit/chainlink/core/logger"
"github.com/smartcontractkit/chainlink/core/services"
"github.com/smartcontractkit/chainlink/core/services/keystore"
"github.com/smartcontractkit/chainlink/core/services/pg"
"github.com/smartcontractkit/chainlink/core/utils"
)
// ErrNoChains indicates that no EVM chains have been started
var ErrNoChains = errors.New("no EVM chains loaded")
var _ ChainSet = &chainSet{}
type ChainConfigUpdater func(*types.ChainCfg) error
//go:generate mockery --name ChainSet --output ./mocks/ --case=underscore
type ChainSet interface {
services.ServiceCtx
Get(id *big.Int) (Chain, error)
Add(ctx context.Context, id *big.Int, config types.ChainCfg) (types.Chain, error)
Remove(id *big.Int) error
Default() (Chain, error)
Configure(ctx context.Context, id *big.Int, enabled bool, config types.ChainCfg) (types.Chain, error)
UpdateConfig(id *big.Int, updaters ...ChainConfigUpdater) error
Chains() []Chain
ChainCount() int
ORM() types.ORM
// GetNode et al retrieves Nodes from the ORM and adds additional state info
GetNode(ctx context.Context, id int32) (node evmtypes.Node, err error)
GetNodes(ctx context.Context, offset, limit int) (nodes []evmtypes.Node, count int, err error)
GetNodesForChain(ctx context.Context, chainID utils.Big, offset, limit int) (nodes []evmtypes.Node, count int, err error)
GetNodesByChainIDs(ctx context.Context, chainIDs []utils.Big) (nodes []types.Node, err error)
}
type chainSet struct {
defaultID *big.Int
chains map[string]*chain
startedChains []Chain
chainsMu sync.RWMutex
logger logger.Logger
orm types.ORM
opts ChainSetOpts
}
func (cll *chainSet) Start(ctx context.Context) error {
if !cll.opts.Config.EVMEnabled() {
cll.logger.Warn("EVM is disabled, no EVM-based chains will be started")
return nil
}
if !cll.opts.Config.EVMRPCEnabled() {
cll.logger.Warn("EVM RPC connections are disabled. Chainlink will not connect to any EVM RPC node.")
}
for _, c := range cll.Chains() {
if err := c.Start(ctx); err != nil {
cll.logger.Criticalw(fmt.Sprintf("EVM: Chain with ID %s failed to start. You will need to fix this issue and restart the Chainlink node before any services that use this chain will work properly. Got error: %v", c.ID(), err), "evmChainID", c.ID(), "err", err)
continue
}
cll.startedChains = append(cll.startedChains, c)
}
evmChainIDs := make([]*big.Int, len(cll.startedChains))
for i, c := range cll.startedChains {
evmChainIDs[i] = c.ID()
}
cll.logger.Infow(fmt.Sprintf("EVM: Started %d/%d chains, default chain ID is %s", len(cll.startedChains), len(cll.Chains()), cll.defaultID.String()), "startedEvmChainIDs", evmChainIDs)
return nil
}
func (cll *chainSet) Close() (err error) {
cll.logger.Debug("EVM: stopping")
for _, c := range cll.startedChains {
err = multierr.Combine(err, c.Close())
}
return
}
func (cll *chainSet) Healthy() (err error) {
for _, c := range cll.Chains() {
err = multierr.Combine(err, c.Healthy())
}
return
}
func (cll *chainSet) Ready() (err error) {
for _, c := range cll.Chains() {
err = multierr.Combine(err, c.Ready())
}
return
}
func (cll *chainSet) Get(id *big.Int) (Chain, error) {
if id == nil {
cll.logger.Debugf("Chain ID not specified, using default: %s", cll.defaultID.String())
return cll.Default()
}
cll.chainsMu.RLock()
defer cll.chainsMu.RUnlock()
c, exists := cll.chains[id.String()]
if exists {
return c, nil
}
return nil, errors.Errorf("chain not found with id %v", id.String())
}
func (cll *chainSet) Default() (Chain, error) {
cll.chainsMu.RLock()
len := len(cll.chains)
cll.chainsMu.RUnlock()
if len == 0 {
return nil, errors.Wrap(ErrNoChains, "cannot get default EVM chain; no EVM chains are available")
}
if cll.defaultID == nil {
// This is an invariant violation; if any chains are available then a
// default should _always_ have been set in the constructor
return nil, errors.New("no default chain ID specified")
}
return cll.Get(cll.defaultID)
}
// Requires a lock on chainsMu
func (cll *chainSet) initializeChain(ctx context.Context, dbchain *types.Chain) error {
// preload nodes
nodes, _, err := cll.orm.NodesForChain(dbchain.ID, 0, math.MaxInt)
if err != nil {
return err
}
dbchain.Nodes = nodes
cid := dbchain.ID.String()
chain, err := newChain(*dbchain, cll.opts)
if err != nil {
return errors.Wrapf(err, "initializeChain: failed to instantiate chain %s", dbchain.ID.String())
}
if err = chain.Start(ctx); err != nil {
return errors.Wrapf(err, "initializeChain: failed to start chain %s", dbchain.ID.String())
}
cll.chains[cid] = chain
return nil
}
func (cll *chainSet) Add(ctx context.Context, id *big.Int, config types.ChainCfg) (types.Chain, error) {
cll.chainsMu.Lock()
defer cll.chainsMu.Unlock()
cid := id.String()
if _, exists := cll.chains[cid]; exists {
return types.Chain{}, errors.Errorf("chain already exists with id %s", id.String())
}
bid := utils.NewBig(id)
dbchain, err := cll.orm.CreateChain(*bid, config)
if err != nil {
return types.Chain{}, err
}
return dbchain, cll.initializeChain(ctx, &dbchain)
}
func (cll *chainSet) Remove(id *big.Int) error {
cll.chainsMu.Lock()
defer cll.chainsMu.Unlock()
if err := cll.orm.DeleteChain(*utils.NewBig(id)); err != nil {
return err
}
cid := id.String()
chain, exists := cll.chains[cid]
if !exists {
// If a chain was removed from the DB that wasn't loaded into the memory set we're done.
return nil
}
delete(cll.chains, cid)
return chain.Close()
}
func (cll *chainSet) Configure(ctx context.Context, id *big.Int, enabled bool, config types.ChainCfg) (types.Chain, error) {
cll.chainsMu.Lock()
defer cll.chainsMu.Unlock()
// Update configuration stored in the database
bid := utils.NewBig(id)
dbchain, err := cll.orm.UpdateChain(*bid, enabled, config)
if err != nil {
return types.Chain{}, err
}
cid := id.String()
chain, exists := cll.chains[cid]
switch {
case exists && !enabled:
// Chain was toggled to disabled
delete(cll.chains, cid)
return types.Chain{}, chain.Close()
case !exists && enabled:
// Chain was toggled to enabled
return dbchain, cll.initializeChain(ctx, &dbchain)
case exists:
// Exists in memory, no toggling: Update in-memory chain
if err = chain.Config().Configure(config); err != nil {
return dbchain, err
}
// TODO: recreate ethClient etc if node set changed
// https://app.shortcut.com/chainlinklabs/story/17044/chainset-should-update-chains-when-nodes-are-changed
}
return dbchain, nil
}
func (cll *chainSet) UpdateConfig(id *big.Int, updaters ...ChainConfigUpdater) error {
bid := utils.NewBig(id)
dbchain, err := cll.orm.Chain(*bid)
if err != nil {
return err
}
cll.chainsMu.RLock()
chain, exists := cll.chains[id.String()]
cll.chainsMu.RUnlock()
if !exists {
return errors.New("chain does not exist")
}
updatedConfig := chain.Config().PersistedConfig()
for _, updater := range updaters {
if err = updater(&updatedConfig); err != nil {
cll.chainsMu.RUnlock()
return err
}
}
_, err = cll.orm.UpdateChain(*bid, dbchain.Enabled, updatedConfig)
if err == nil {
return chain.Config().Configure(updatedConfig)
}
return err
}
func (cll *chainSet) Chains() (c []Chain) {
cll.chainsMu.RLock()
defer cll.chainsMu.RUnlock()
for _, chain := range cll.chains {
c = append(c, chain)
}
return c
}
func (cll *chainSet) ChainCount() int {
cll.chainsMu.RLock()
defer cll.chainsMu.RUnlock()
return len(cll.chains)
}
func (cll *chainSet) ORM() types.ORM {
return cll.orm
}
func (cll *chainSet) GetNode(ctx context.Context, id int32) (n evmtypes.Node, err error) {
n, err = cll.orm.Node(id, pg.WithParentCtx(ctx))
if err != nil {
err = errors.Wrap(err, "GetNode failed to load node from DB")
return
}
cll.addStateToNode(&n)
return
}
func (cll *chainSet) GetNodes(ctx context.Context, offset, limit int) (nodes []evmtypes.Node, count int, err error) {
nodes, count, err = cll.orm.Nodes(offset, limit, pg.WithParentCtx(ctx))
if err != nil {
err = errors.Wrap(err, "GetNodes failed to load nodes from DB")
return
}
for i := range nodes {
cll.addStateToNode(&nodes[i])
}
return
}
func (cll *chainSet) GetNodesForChain(ctx context.Context, chainID utils.Big, offset, limit int) (nodes []evmtypes.Node, count int, err error) {
nodes, count, err = cll.orm.NodesForChain(chainID, offset, limit, pg.WithParentCtx(ctx))
if err != nil {
err = errors.Wrap(err, "GetNodesForChain failed to load nodes from DB")
return
}
for i := range nodes {
cll.addStateToNode(&nodes[i])
}
return
}
func (cll *chainSet) GetNodesByChainIDs(ctx context.Context, chainIDs []utils.Big) (nodes []evmtypes.Node, err error) {
nodes, err = cll.orm.GetNodesByChainIDs(chainIDs, pg.WithParentCtx(ctx))
if err != nil {
err = errors.Wrap(err, "GetNodesForChain failed to load nodes from DB")
return
}
for i := range nodes {
cll.addStateToNode(&nodes[i])
}
return
}
func (cll *chainSet) addStateToNode(n *evmtypes.Node) {
cll.chainsMu.RLock()
chain, exists := cll.chains[n.EVMChainID.String()]
cll.chainsMu.RUnlock()
if !exists {
// The EVM chain is disabled
n.State = "Disabled"
return
}
states := chain.Client().NodeStates()
if states == nil {
n.State = "Unknown"
return
}
state, exists := states[n.ID]
if exists {
n.State = state
return
}
// The node is in the DB and the chain is enabled but it's not running
n.State = "NotLoaded"
}
type ChainSetOpts struct {
Config config.GeneralConfig
Logger logger.Logger
DB *sqlx.DB
KeyStore keystore.Eth
EventBroadcaster pg.EventBroadcaster
ORM types.ORM
// Gen-functions are useful for dependency injection by tests
GenEthClient func(types.Chain) evmclient.Client
GenLogBroadcaster func(types.Chain) log.Broadcaster
GenHeadTracker func(types.Chain, httypes.HeadBroadcaster) httypes.HeadTracker
GenTxManager func(types.Chain) txmgr.TxManager
}
func LoadChainSet(opts ChainSetOpts) (ChainSet, error) {
if err := checkOpts(&opts); err != nil {
return nil, err
}
dbchains, err := opts.ORM.EnabledChainsWithNodes()
if err != nil {
return nil, errors.Wrap(err, "error loading chains")
}
return NewChainSet(opts, dbchains)
}
func NewChainSet(opts ChainSetOpts, dbchains []types.Chain) (ChainSet, error) {
if err := checkOpts(&opts); err != nil {
return nil, err
}
opts.Logger = opts.Logger.Named("EVM")
defaultChainID := opts.Config.DefaultChainID()
if defaultChainID == nil && len(dbchains) >= 1 {
defaultChainID = dbchains[0].ID.ToInt()
if len(dbchains) > 1 {
opts.Logger.Debugf("Multiple chains present but ETH_CHAIN_ID was not specified, falling back to default chain: %s", defaultChainID.String())
}
}
var err error
cll := &chainSet{defaultChainID, make(map[string]*chain), make([]Chain, 0), sync.RWMutex{}, opts.Logger.Named("ChainSet"), opts.ORM, opts}
for i := range dbchains {
cid := dbchains[i].ID.String()
cll.logger.Infow(fmt.Sprintf("Loading chain %s", cid), "evmChainID", cid)
chain, err2 := newChain(dbchains[i], opts)
if err2 != nil {
err = multierr.Combine(err, err2)
continue
}
if _, exists := cll.chains[cid]; exists {
return nil, errors.Errorf("duplicate chain with ID %s", cid)
}
cll.chains[cid] = chain
}
return cll, err
}
func checkOpts(opts *ChainSetOpts) error {
if opts.Logger == nil {
return errors.New("logger must be non-nil")
}
if opts.Config == nil {
return errors.New("config must be non-nil")
}
if opts.ORM == nil {
opts.ORM = NewORM(opts.DB, opts.Logger, opts.Config)
}
return nil
}
func UpdateKeySpecificMaxGasPrice(addr common.Address, maxGasPriceWei *big.Int) ChainConfigUpdater {
return func(config *types.ChainCfg) error {
keyChainConfig, ok := config.KeySpecific[addr.Hex()]
if !ok {
keyChainConfig = types.ChainCfg{}
}
keyChainConfig.EvmMaxGasPriceWei = (*utils.Big)(maxGasPriceWei)
if config.KeySpecific == nil {
config.KeySpecific = map[string]types.ChainCfg{}
}
config.KeySpecific[addr.Hex()] = keyChainConfig
return nil
}
}