59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
package rpcfilters
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import (
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"errors"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/status-im/status-go/rpc"
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)
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type rpcProvider interface {
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RPCClient() *rpc.Client
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}
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// blockInfo contains the hash and the number of the latest block
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type blockInfo struct {
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Hash common.Hash `json:"hash"`
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NumberBytes hexutil.Bytes `json:"number"`
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}
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// Number returns a big.Int representation of the encoded block number.
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func (i blockInfo) Number() *big.Int {
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number := big.NewInt(0)
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number.SetBytes(i.NumberBytes)
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return number
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}
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// latestBlockProvider provides the latest block info from the blockchain
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type latestBlockProvider interface {
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GetLatestBlock() (blockInfo, error)
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}
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// latestBlockProviderRPC is an implementation of latestBlockProvider interface
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// that requests a block using an RPC client provided
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type latestBlockProviderRPC struct {
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rpc rpcProvider
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}
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// GetLatestBlock returns the block info
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func (p *latestBlockProviderRPC) GetLatestBlock() (blockInfo, error) {
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rpcClient := p.rpc.RPCClient()
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if rpcClient == nil {
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return blockInfo{}, errors.New("no active RPC client: is the node running?")
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}
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var result blockInfo
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err := rpcClient.Call(&result, "eth_getBlockByNumber", "latest", false)
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if err != nil {
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return blockInfo{}, err
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}
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return result, nil
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}
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