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moonbeam.go
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moonbeam.go
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package rpc
import (
"context"
"math/big"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// MoonbeamClient is a JSON-RPC client of Moonbeam
type MoonbeamClient struct {
*EthereumClient
}
// NewMoonbeamClient is the constructor
func NewMoonbeamClient(ethereumClient *EthereumClient) (*MoonbeamClient, error) {
client := &MoonbeamClient{EthereumClient: ethereumClient}
if _, err := client.latestFinalizedBlockNumber(context.Background()); err != nil {
return nil, err
}
return client, nil
}
// IsFinalized determines whether or not the given transaction receipt is finalized on the chain
func (c *MoonbeamClient) IsFinalized(ctx context.Context, _ uint64, txReceipt *types.Receipt) (bool, error) {
latestFinalizedBlockNumber, err := c.latestFinalizedBlockNumber(ctx)
if err != nil {
return false, err
}
if latestFinalizedBlockNumber == nil {
return false, ethereum.NotFound
}
return latestFinalizedBlockNumber.Cmp(txReceipt.BlockNumber) >= 0, nil
}
func (c *MoonbeamClient) latestFinalizedBlockNumber(ctx context.Context) (*big.Int, error) {
var blockHash common.Hash
if err := c.rpc.CallContext(ctx, &blockHash, "chain_getFinalizedHead"); err != nil {
return nil, err
}
var moonbeamHeader moonbeamHeader
if err := c.rpc.CallContext(ctx, &moonbeamHeader, "chain_getHeader", blockHash); err != nil {
return nil, err
}
return moonbeamHeader.Number.ToInt(), nil
}