4bac1f6c04
Implements consensus.RingOutputsFn by looking up output public keys from the chain's global output index and transaction store. Wired into the sync loop so VerifySignatures=true uses real crypto verification. Co-Authored-By: Charon <charon@lethean.io>
43 lines
1.3 KiB
Go
43 lines
1.3 KiB
Go
// Copyright (c) 2017-2026 Lethean (https://lt.hn)
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//
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// Licensed under the European Union Public Licence (EUPL) version 1.2.
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// SPDX-License-Identifier: EUPL-1.2
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package chain
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import (
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"fmt"
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"forge.lthn.ai/core/go-blockchain/types"
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)
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// GetRingOutputs fetches the public keys for the given global output indices
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// at the specified amount. This implements the consensus.RingOutputsFn
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// signature for use during signature verification.
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func (c *Chain) GetRingOutputs(amount uint64, offsets []uint64) ([]types.PublicKey, error) {
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pubs := make([]types.PublicKey, len(offsets))
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for i, gidx := range offsets {
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txHash, outNo, err := c.GetOutput(amount, gidx)
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if err != nil {
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return nil, fmt.Errorf("ring output %d (amount=%d, gidx=%d): %w", i, amount, gidx, err)
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}
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tx, _, err := c.GetTransaction(txHash)
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if err != nil {
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return nil, fmt.Errorf("ring output %d: tx %s: %w", i, txHash, err)
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}
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if int(outNo) >= len(tx.Vout) {
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return nil, fmt.Errorf("ring output %d: tx %s has %d outputs, want index %d",
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i, txHash, len(tx.Vout), outNo)
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}
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switch out := tx.Vout[outNo].(type) {
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case types.TxOutputBare:
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pubs[i] = out.Target.Key
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default:
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return nil, fmt.Errorf("ring output %d: unsupported output type %T", i, out)
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}
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}
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return pubs, nil
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}
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