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@@ -0,0 +1,80 @@
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+constant "DaoBurn" {
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+ EcFixedPointShort VALUE_COMMIT_VALUE,
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+ EcFixedPoint VALUE_COMMIT_RANDOM,
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+}
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+
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+contract "DaoBurn" {
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+ Base treasury_value,
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+ Base authority_key_x,
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+ Base authority_key_y,
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+ Base governance_token_id,
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+ Base treasury_token_id,
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+ Scalar treasury_value_blind,
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+ Base authority_key_x_blind,
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+ Base authority_key_y_blind,
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+ Base governance_token_id_blind,
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+ Base treasury_token_id_blind,
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+
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+ # BullaBurn subroutine
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+ Base serial,
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+ Base coin_blind,
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+ Uint32 leaf_pos,
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+ MerklePath path,
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+ Base signature_secret,
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+}
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+
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+contract "DaoBurn" {
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+ # Pedersen commitment for coin's value
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+ vcv = ec_mul_short(treasury_value, VALUE_COMMIT_VALUE);
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+ vcr = ec_mul(treasury_value_blind, VALUE_COMMIT_RANDOM);
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+ value_commit = ec_add(vcv, vcr);
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+ # Since the value commit is a curve point, we fetch its coordinates
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+ # and constrain them:
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+ value_commit_x = ec_get_x(value_commit);
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+ value_commit_y = ec_get_y(value_commit);
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+ constrain_instance(value_commit_x);
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+ constrain_instance(value_commit_y);
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+
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+ authority_x_commit = poseidon_hash(authority_key_x, authority_key_x_blind);
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+ constrain_instance(authority_x_commit);
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+
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+ authority_y_commit = poseidon_hash(authority_key_y, authority_key_y_blind);
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+ constrain_instance(authority_y_commit);
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+
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+ gov_token_id_commit = poseidon_hash(
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+ governance_token_id, governance_token_id_blind);
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+ constrain_instance(gov_token_id_commit);
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+
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+ treasury_token_id_commit = poseidon_hash(
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+ treasury_token_id, treasury_token_id_blind);
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+ constrain_instance(treasury_token_id_commit);
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+
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+ # BullaBurn subroutine
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+
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+ # Poseidon hash of the nullifier
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+ nullifier = poseidon_hash(serial);
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+ constrain_instance(nullifier);
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+
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+ C = poseidon_hash(
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+ treasury_value,
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+ authority_key_x,
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+ authority_key_y,
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+ governance_token_id,
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+ treasury_token_id,
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+ serial,
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+ coin_blind
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+ );
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+
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+ # Merkle root
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+ root = calculate_merkle_root(leaf_pos, path, C);
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+ constrain_instance(root);
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+
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+ # Finally, we derive a public key for the signature and
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+ # constrain its coordinates:
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+ signature_public = ec_mul_base(signature_secret, NULLIFIER_K);
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+ signature_x = ec_get_x(signature_public);
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+ signature_y = ec_get_y(signature_public);
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+ constrain_instance(signature_x);
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+ constrain_instance(signature_y);
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+}
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+
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