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chains.go
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chains.go
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package chains
import (
"fmt"
"math/big"
"sync"
"github.com/GoPlugin/Plugin/core/logger"
)
// To add a new chain to this file:
// 1. Add the global var in the vars list
// 2. Add the chain ID in the map in the init() function
// 3. Add a config set in configs.go
// Chain represents a blockchain with a unique Chain ID
type Chain struct {
id *big.Int
config ChainSpecificConfig
logOnce sync.Once
}
func (c *Chain) setChainID(id int64) {
c.id = big.NewInt(id)
}
func (c *Chain) ID() *big.Int {
return c.id
}
func (c *Chain) Config() ChainSpecificConfig {
if !c.config.set {
c.logOnce.Do(func() {
logger.Warnf("chain with ID %s does not have a chain-specific config, using fallback config instead", c.ID())
})
return FallbackConfig
}
return c.config
}
// IsArbitrum returns true if the chain is arbitrum mainnet or testnet
func (c *Chain) IsArbitrum() bool {
return c.ID().Cmp(ArbitrumMainnet.ID()) == 0 || c.ID().Cmp(ArbitrumRinkeby.ID()) == 0
}
// IsOptimism returns true if the chain is optimism mainnet or testnet
func (c *Chain) IsOptimism() bool {
return c.ID().Cmp(OptimismMainnet.ID()) == 0 || c.ID().Cmp(OptimismKovan.ID()) == 0
}
// IsL2 returns true if this chain is an L2 chain, notably that the block
// numbers used for log searching are different from calling block.number
func (c *Chain) IsL2() bool {
return c.IsOptimism() || c.IsArbitrum()
}
var chains map[int64]*Chain
var (
EthMainnet = new(Chain)
EthRinkeby = new(Chain)
EthGoerli = new(Chain)
EthKovan = new(Chain)
OptimismMainnet = new(Chain)
OptimismKovan = new(Chain)
ArbitrumMainnet = new(Chain)
ArbitrumRinkeby = new(Chain)
BSCMainnet = new(Chain)
HecoMainnet = new(Chain)
FantomMainnet = new(Chain)
FantomTestnet = new(Chain)
PolygonMainnet = new(Chain)
PolygonMumbai = new(Chain)
XDaiMainnet = new(Chain)
RSKMainnet = new(Chain)
AvalancheFuji = new(Chain)
)
func init() {
chains = make(map[int64]*Chain)
chains[1] = EthMainnet
chains[4] = EthRinkeby
chains[5] = EthGoerli
chains[42] = EthKovan
chains[10] = OptimismMainnet
chains[69] = OptimismKovan
chains[42161] = ArbitrumMainnet
chains[421611] = ArbitrumRinkeby
chains[56] = BSCMainnet
chains[128] = HecoMainnet
chains[250] = FantomMainnet
chains[4002] = FantomTestnet
chains[137] = PolygonMainnet
chains[80001] = PolygonMumbai
chains[100] = XDaiMainnet
chains[30] = RSKMainnet
chains[43113] = AvalancheFuji
for id, chain := range chains {
chain.setChainID(id)
}
setConfigs()
}
var chainsMu sync.Mutex
// ChainFromID returns the chain for the given ID
// If no chain is found, creates a new one and returns that
func ChainFromID(id *big.Int) *Chain {
if !id.IsInt64() {
panic(fmt.Sprintf("chain IDs larger than the max 64 bit integer are not currently supported, got: %s", id.String()))
}
chainsMu.Lock()
defer chainsMu.Unlock()
chain, exists := chains[id.Int64()]
if exists {
return chain
}
logger.Warnf("Chain ID %s is not known, falling back to generic chain", id)
chain = new(Chain)
chain.id = id
chains[id.Int64()] = chain
return chain
}