elements: Change function prefix to elements_ for some functions

Suggested-by: Rusty Russell <@rustyrussell>

bitcoin/tx.c

@@ -62,7 +62,7 @@ int bitcoin_tx_add_multi_outputs(struct bitcoin_tx *tx,
 	return tx->wtx->num_outputs;
 }
 
-static bool bitcoin_tx_output_is_fee(const struct bitcoin_tx *tx, int outnum)
+static bool elements_tx_output_is_fee(const struct bitcoin_tx *tx, int outnum)
 {
 	assert(outnum < tx->wtx->num_outputs);
 	return is_elements && tx->wtx->outputs[outnum].script_len == 0;
@@ -79,7 +79,7 @@ static u64 bitcoin_tx_compute_fee(const struct bitcoin_tx *tx)
 		fee += tx->input_amounts[i]->satoshis; /* Raw: fee computation */
 
 	for (size_t i=0; i<tx->wtx->num_outputs; i++) {
-		if (bitcoin_tx_output_is_fee(tx, i))
+		if (elements_tx_output_is_fee(tx, i))
 			continue;
 
 		if (!is_elements) {
@@ -95,7 +95,7 @@ static u64 bitcoin_tx_compute_fee(const struct bitcoin_tx *tx)
 	return fee;
 }
 
-int bitcoin_tx_add_fee_output(struct bitcoin_tx *tx)
+int elements_tx_add_fee_output(struct bitcoin_tx *tx)
 {
 	struct amount_sat fee;
 	int pos = -1;
@@ -108,7 +108,7 @@ int bitcoin_tx_add_fee_output(struct bitcoin_tx *tx)
 
 	/* Try to find any existing fee output */
 	for (int i=0; i<tx->wtx->num_outputs; i++) {
-		if (bitcoin_tx_output_is_fee(tx, i)) {
+		if (elements_tx_output_is_fee(tx, i)) {
 			assert(pos == -1);
 			pos = i;
 		}

bitcoin/tx.h

@@ -158,6 +158,6 @@ bool bitcoin_tx_check(const struct bitcoin_tx *tx);
  * Returns the position of the fee output, or -1 in the case of non-elements
  * transactions.
  */
-int bitcoin_tx_add_fee_output(struct bitcoin_tx *tx);
+int elements_tx_add_fee_output(struct bitcoin_tx *tx);
 
 #endif /* LIGHTNING_BITCOIN_TX_H */

channeld/commit_tx.c

@@ -289,7 +289,7 @@ struct bitcoin_tx *commit_tx(const tal_t *ctx,
 	u32 sequence = (0x80000000 | ((obscured_commitment_number>>24) & 0xFFFFFF));
 	bitcoin_tx_add_input(tx, funding_txid, funding_txout, sequence, funding, NULL);
 
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 
 	return tx;
 }

common/close_tx.c

@@ -61,7 +61,7 @@ struct bitcoin_tx *create_close_tx(const tal_t *ctx,
 		return tal_free(tx);
 
 	permute_outputs(tx, NULL, NULL);
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 
 	assert(bitcoin_tx_check(tx));
 	return tx;

common/funding_tx.c

@@ -49,7 +49,7 @@ struct bitcoin_tx *funding_tx(const tal_t *ctx,
 
 	permute_inputs(tx, (const void **)utxomap);
 
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 	assert(bitcoin_tx_check(tx));
 	return tx;
 }

common/htlc_tx.c

@@ -63,7 +63,7 @@ static struct bitcoin_tx *htlc_tx(const tal_t *ctx,
 	wscript = bitcoin_wscript_htlc_tx(tx, to_self_delay, revocation_pubkey,
 					  local_delayedkey);
 	bitcoin_tx_add_output(tx, scriptpubkey_p2wsh(tx, wscript), amount);
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 
 	tal_free(wscript);
 

common/initial_commit_tx.c

@@ -237,7 +237,7 @@ struct bitcoin_tx *initial_commit_tx(const tal_t *ctx,
 	sequence = (0x80000000 | ((obscured_commitment_number>>24) & 0xFFFFFF));
 	bitcoin_tx_add_input(tx, funding_txid, funding_txout, sequence, funding, NULL);
 
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 	assert(bitcoin_tx_check(tx));
 
 	return tx;

common/withdraw_tx.c

@@ -38,7 +38,7 @@ struct bitcoin_tx *withdraw_tx(const tal_t *ctx,
 	} else if (change_outnum)
 		*change_outnum = -1;
 	permute_inputs(tx, (const void **)utxos);
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 	assert(bitcoin_tx_check(tx));
 	return tx;
 }

onchaind/onchaind.c

@@ -147,7 +147,7 @@ static bool grind_htlc_tx_fee(struct amount_sat *fee,
 			break;
 
 		bitcoin_tx_output_set_amount(tx, 0, out);
-		bitcoin_tx_add_fee_output(tx);
+		elements_tx_add_fee_output(tx);
 		if (!check_tx_sig(tx, 0, NULL, wscript,
 				  &keyset->other_htlc_key, remotesig))
 			continue;
@@ -192,7 +192,7 @@ static bool set_htlc_timeout_fee(struct bitcoin_tx *tx,
 			      type_to_string(tmpctx, struct bitcoin_tx, tx));
 
 	bitcoin_tx_output_set_amount(tx, 0, amount);
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 	return check_tx_sig(tx, 0, NULL, wscript,
 			    &keyset->other_htlc_key, remotesig);
 }
@@ -232,7 +232,7 @@ static void set_htlc_success_fee(struct bitcoin_tx *tx,
 			      type_to_string(tmpctx, struct amount_sat, &fee),
 			      type_to_string(tmpctx, struct bitcoin_tx, tx));
 	bitcoin_tx_output_set_amount(tx, 0, amt);
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 
 	if (check_tx_sig(tx, 0, NULL, wscript,
 			 &keyset->other_htlc_key, remotesig))
@@ -365,7 +365,7 @@ static struct bitcoin_tx *tx_to_us(const tal_t *ctx,
 					     &amt));
 	}
 	bitcoin_tx_output_set_amount(tx, 0, amt);
-	bitcoin_tx_add_fee_output(tx);
+	elements_tx_add_fee_output(tx);
 
 	if (!wire_sync_write(HSM_FD, take(hsm_sign_msg(NULL, tx, wscript))))
 		status_failed(STATUS_FAIL_HSM_IO, "Writing sign request to hsm");