chore: add sign_multiple_transfers example (3x)

Cargo.toml

@@ -18,6 +18,10 @@ name = "get_public_key"
 name = "sign_transfer"
 path = "examples/sign_transaction/transfer.rs"
 
+[[example]]
+name = "sign_multiple_transfers"
+path = "examples/sign_transaction/multiple_transfers.rs"
+
 [[example]]
 name = "blind_sign_transaction"
 

README.md

@@ -92,6 +92,12 @@ RUST_LOG=get_public_key,near_ledger=info cargo run --example get_public_key
 RUST_LOG=sign_transfer,near_ledger=info cargo run --example sign_transfer
 ```
 
+#### Multiple transfers
+
+```bash
+RUST_LOG=sign_multiple_transfers,near_ledger=info cargo run --example sign_multiple_transfers
+```
+
 ### Blind sign a transaction
 
 ```bash

examples/blind_sign_transaction.rs

@@ -16,7 +16,7 @@ fn long_tx(ledger_pub_key: ed25519_dalek::PublicKey) -> near_primitives::transac
         .map(|_el| {
             near_primitives::transaction::Action::Transfer(
                 near_primitives::transaction::TransferAction {
-                    deposit: 150000000000000000000000 * _el as u128,
+                    deposit: 150000000000000000000000 * _el as u128, // 0.15 NEAR
                 },
             )
         })

examples/sign_transaction/multiple_transfers.rs

@@ -0,0 +1,26 @@
+use near_ledger::NEARLedgerError;
+
+
+#[path = "../common/lib.rs"]
+mod common;
+
+fn tx(ledger_pub_key: ed25519_dalek::PublicKey) -> near_primitives::transaction::Transaction {
+    let mut tx = common::tx_template(ledger_pub_key);
+
+    const SIZE: usize = 3;
+    let transfers = (0..SIZE)
+        .map(|_el| {
+            near_primitives::transaction::Action::Transfer(
+                near_primitives::transaction::TransferAction {
+                    deposit: 150000000000000000000000 * _el as u128, // 0.15 NEAR
+                },
+            )
+        })
+        .collect::<Vec<_>>();
+    tx.actions = transfers;
+    tx
+}
+
+fn main() -> Result<(), NEARLedgerError> {
+    common::get_key_sign_and_verify_flow(tx)
+}

examples/sign_transaction/transfer.rs

@@ -8,7 +8,7 @@ fn tx(ledger_pub_key: ed25519_dalek::PublicKey) -> near_primitives::transaction:
     let mut tx = common::tx_template(ledger_pub_key);
     tx.actions = vec![near_primitives::transaction::Action::Transfer(
         near_primitives::transaction::TransferAction {
-            deposit: 150000000000000000000000,
+            deposit: 150000000000000000000000, // 0.15 NEAR
         },
     )];
     tx