45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
package registry
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import (
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"context"
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"fmt"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p/discover"
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)
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var logger = log.New("package", "mailserver/registry")
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// Verifier verifies nodes based on a smart contract.
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type Verifier struct {
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rc *RegistryCaller
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}
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// NewVerifier returns a new Verifier instance.
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func NewVerifier(contractCaller bind.ContractCaller, contractAddress common.Address) (*Verifier, error) {
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logger.Debug("initializing mailserver registry verifier", "address", fmt.Sprintf("0x%x", contractAddress))
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rc, err := NewRegistryCaller(contractAddress, contractCaller)
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if err != nil {
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logger.Debug("error initializing mailserver registry verifier", "address", fmt.Sprintf("0x%x", contractAddress))
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return nil, err
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}
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return &Verifier{
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rc: rc,
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}, nil
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}
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// VerifyNode checks if a given node is trusted using a smart contract.
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func (v *Verifier) VerifyNode(ctx context.Context, nodeID discover.NodeID) bool {
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res, err := v.rc.Exists(&bind.CallOpts{Context: ctx}, nodeID.Bytes())
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logger.Debug("verifying node", "id", nodeID, "verified", res)
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if err != nil {
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logger.Error("error verifying node", "id", nodeID, "error", err)
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return false
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}
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return res
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}
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