dione/blockchain/utils/verification.go

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package utils
import (
"fmt"
"github.com/Secured-Finance/dione/blockchain/types"
"github.com/wealdtech/go-merkletree"
"github.com/wealdtech/go-merkletree/keccak256"
)
func VerifyTx(blockHeader *types.BlockHeader, tx *types.Transaction) error {
if tx.MerkleProof.Hashes == nil {
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return fmt.Errorf("block transaction doesn't have merkle proof")
}
txProofVerified, err := merkletree.VerifyProofUsing(tx.Hash, true, &tx.MerkleProof, [][]byte{blockHeader.Hash}, keccak256.New())
if err != nil {
return fmt.Errorf("failed to verify tx hash merkle proof: %s", err.Error())
}
if !txProofVerified {
return fmt.Errorf("transaction doesn't present in block hash merkle tree")
}
if !tx.ValidateHash() {
return fmt.Errorf("transaction hash is invalid")
}
return nil
}