xeth/frontend.go


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package xeth

import (
    "github.com/ethereum/go-ethereum/core/types"
)

// Frontend should be implemented by users of XEth. Its methods are
// called whenever XEth makes a decision that requires user input.
type Frontend interface {
    // UnlockAccount is called when a transaction needs to be signed
    // but the key corresponding to the transaction's sender is
    // locked.
    //
    // It should unlock the account with the given address and return
    // true if unlocking succeeded.
    UnlockAccount(address []byte) bool

    // This is called for all transactions inititated through
    // Transact. It should prompt the user to confirm the transaction
    // and return true if the transaction was acknowledged.
    //
    // ConfirmTransaction is not used for Call transactions
    // because they cannot change any state.
    ConfirmTransaction(tx *types.Transaction) bool
}

// dummyFrontend is a non-interactive frontend that allows all
// transactions but cannot not unlock any keys.
type dummyFrontend struct{}

func (dummyFrontend) UnlockAccount([]byte) bool                  { return false }
func (dummyFrontend) ConfirmTransaction(*types.Transaction) bool { return true }