34128d8e98
Update go.mod module line, all require/replace directives, and every .go import path from forge.lthn.ai/core/go-blockchain to dappco.re/go/core/blockchain. Add replace directives to bridge dappco.re paths to existing forge.lthn.ai registry during migration. Update CLAUDE.md, README, and docs to reflect the new module path. Co-Authored-By: Virgil <virgil@lethean.io>
85 lines
3.1 KiB
Go
85 lines
3.1 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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coreerr "dappco.re/go/core/log"
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"dappco.re/go/core/blockchain/consensus"
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"dappco.re/go/core/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, coreerr.E("Chain.GetRingOutputs", fmt.Sprintf("ring output %d (amount=%d, gidx=%d)", 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, coreerr.E("Chain.GetRingOutputs", fmt.Sprintf("ring output %d: tx %s", i, txHash), err)
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}
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if int(outNo) >= len(tx.Vout) {
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return nil, coreerr.E("Chain.GetRingOutputs", fmt.Sprintf("ring output %d: tx %s has %d outputs, want index %d", i, txHash, len(tx.Vout), outNo), nil)
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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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toKey, ok := out.Target.(types.TxOutToKey)
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if !ok {
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return nil, coreerr.E("Chain.GetRingOutputs", fmt.Sprintf("ring output %d: unsupported target type %T", i, out.Target), nil)
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}
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pubs[i] = toKey.Key
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default:
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return nil, coreerr.E("Chain.GetRingOutputs", fmt.Sprintf("ring output %d: unsupported output type %T", i, out), nil)
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}
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}
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return pubs, nil
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}
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// GetZCRingOutputs fetches ZC ring members (stealth address, amount commitment,
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// blinded asset ID) for the given global output indices. This implements the
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// consensus.ZCRingOutputsFn signature for post-HF4 CLSAG GGX verification.
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//
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// ZC outputs are indexed at amount=0 (confidential amounts).
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func (c *Chain) GetZCRingOutputs(offsets []uint64) ([]consensus.ZCRingMember, error) {
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members := make([]consensus.ZCRingMember, len(offsets))
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for i, gidx := range offsets {
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txHash, outNo, err := c.GetOutput(0, gidx)
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if err != nil {
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return nil, coreerr.E("Chain.GetZCRingOutputs", fmt.Sprintf("ZC ring output %d (gidx=%d)", i, 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, coreerr.E("Chain.GetZCRingOutputs", fmt.Sprintf("ZC ring output %d: tx %s", i, txHash), err)
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}
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if int(outNo) >= len(tx.Vout) {
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return nil, coreerr.E("Chain.GetZCRingOutputs", fmt.Sprintf("ZC ring output %d: tx %s has %d outputs, want index %d", i, txHash, len(tx.Vout), outNo), nil)
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}
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switch out := tx.Vout[outNo].(type) {
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case types.TxOutputZarcanum:
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members[i] = consensus.ZCRingMember{
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StealthAddress: [32]byte(out.StealthAddress),
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AmountCommitment: [32]byte(out.AmountCommitment),
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BlindedAssetID: [32]byte(out.BlindedAssetID),
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}
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default:
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return nil, coreerr.E("Chain.GetZCRingOutputs", fmt.Sprintf("ZC ring output %d: expected TxOutputZarcanum, got %T", i, out), nil)
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}
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}
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return members, nil
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}
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