Add rb interpreter (#220)

Author: anastasiarods

.changeset/odd-crews-breathe.md

@@ -0,0 +1,5 @@
+---
+'@3loop/transaction-interpreter': patch
+---
+
+Add rb interpreter

packages/transaction-interpreter/interpreters/rainbow.ts

@@ -0,0 +1,28 @@
+import { displayAsset, getNetTransfers, defaultEvent } from './std.js'
+import type { InterpretedTransaction } from '@/types.js'
+import type { DecodedTransaction } from '@3loop/transaction-decoder'
+
+export function transformEvent(event: DecodedTransaction): InterpretedTransaction {
+  const newEvent = defaultEvent(event)
+
+  const netSent = getNetTransfers({
+    transfers: event.transfers,
+    fromAddresses: [event.fromAddress],
+  })
+
+  const netReceived = getNetTransfers({
+    transfers: event.transfers,
+    toAddresses: [event.fromAddress],
+  })
+
+  if (netSent.length === 1 && netReceived.length === 1) {
+    return {
+      ...newEvent,
+      type: 'swap',
+      action: 'Swapped ' + displayAsset(netSent[0]) + ' for ' + displayAsset(netReceived[0]),
+    }
+  }
+  return newEvent
+}
+
+export const contracts = ['8453:0x00000000009726632680FB29d3F7A9734E3010E2']