# Funding and cross-chain Source: https://www.scanner.net/docs/api/reference/funding > Trace a wallet's funding chain hop by hop, and look up its bridge transfers to and from other chains. Two ways to follow money into and out of a wallet: back up its funding chain, and across bridges to other chains. 3 routes. Every path below is served under `https://api.scanner.net`, and every request carries the key header, so those two are not repeated per route. Shared errors, limits and streaming are in [Requests and errors](/docs/api/reference/conventions). Funding chain stream [#funding-chain-stream] ```http GET /funding-chain/stream ``` Walks a wallet's funding back one hop at a time: who funded it, who funded that wallet, and so on, until it reaches a labelled entity, a KOL wallet, a wallet with no funder, a loop, or the depth limit. Answers with [server-sent events](/docs/api/reference/conventions#streaming-routes). Works on Solana and Robinhood Chain; the chain is taken from the address. | Parameter | In | Type | Required | Notes | | ---------- | ----- | ------- | -------- | ------------------------------------------------------------------------------------------------------------------------------- | | `address` | query | string | yes | A Solana address, or a `0x` address for Robinhood Chain. | | `maxDepth` | query | integer | no | Hops to walk. Up to 50 on Solana and 8 on Robinhood Chain, which are also the defaults. Larger values are lowered to the limit. | ```bash curl -N "https://api.scanner.net/funding-chain/stream?address=WALLET_ADDRESS&maxDepth=20" \ -H "x-api-key: $SCANNER_API_KEY" ``` **Events:** * `start`: `{ address, maxDepth, cached }`. * `layer`: `{ node }`, once per hop. Depth 0 is the wallet you asked about. Each node has `address`, `depth`, `fundedAmount`, `fundedAsset`, `fundedDate`, `signature`, `isBundled`, `bundleGroupIds` and `entity` when labelled. On Robinhood Chain all layers arrive together when the trace finishes. * `terminal`: `{ reason, terminalDepth, node }`. `reason` is `labeled`, `kol`, `depth`, `loop` or `no_funder`. Robinhood Chain traces end with `labeled`, `no_funder` or `depth`. * `complete`: `{ chain: { holderAddress, chain: [...] }, tracedAt }`, with `tracedAt` in unix milliseconds. * `error`: `{ error, code }`, with code `TIMEOUT` or `INTERNAL_ERROR`. **Cost:** 1 scan for a live trace, charged before it starts. A trace of the same address with the same `maxDepth` from the last 24 hours is replayed free, with `cached: true`. A different `maxDepth` is a separate trace. A failed trace is refunded, unless the connection was closed after layers had arrived. | Status | Code | When | | ------ | ---------------------- | ----------------------------- | | 400 | `MISSING_ADDRESS` | No `address`. | | 400 | `INVALID_ADDRESS` | Not a Solana or `0x` address. | | 402 | `INSUFFICIENT_CREDITS` | Not enough scans left. | The two `400` bodies are `{ "success": false, "error", "code" }`, without `requestId`. Cross-chain lookup [#cross-chain-lookup] ```http GET /cross-chain/{address} ``` Bridge transfers to and from a wallet, gathered from bridge providers. Works for Solana and `0x` addresses. | Parameter | In | Type | Required | Notes | | --------- | ----- | ------ | -------- | ------------------------------------------------------------------------------------- | | `address` | path | string | yes | A Solana address or a `0x` address. | | `stored` | query | string | no | `1` returns only what Scanner has already stored, without asking the providers. Free. | ```bash curl "https://api.scanner.net/cross-chain/WALLET_ADDRESS" \ -H "x-api-key: $SCANNER_API_KEY" ``` **Response:** `{ "success": true, "address", "transfers", "complete", "providers", "checkedAt", "missing", "cached" }`. * `transfers`: newest first, at most 500. Each has `id`, `source` (the bridge), `status` (`pending`, `success`, `failed`, `refunded` or `unknown`), `createdAtMs`, `sender`, `receivers`, `src` and `dst` legs (`chain`, `chainName`, `tokenSymbol`, `amount`, `txHash`), `amountUsd` and `direction` (`in`, `out` or `self`). * `complete`: `false` when some providers didn't answer. `providers` gives `answered` and `total`, and `missing` how many failed. Use [Retry](#cross-chain-retry) to ask the missing ones again. * `cached`: `true` when the answer came from a recent lookup. A provider failure gives an incomplete result, not an error. **Cost:** 1 scan for a live search, charged up front. It is refunded when no provider answered. `stored=1` and cached answers are free. | Status | Code | When | | ------ | ---------------------- | ----------------------------- | | 400 | `MISSING_ADDRESS` | Empty address. | | 400 | `INVALID_ADDRESS` | Not a Solana or `0x` address. | | 402 | `INSUFFICIENT_CREDITS` | Not enough scans left. | Cross-chain retry [#cross-chain-retry] ```http POST /cross-chain/{address}/retry ``` Asks again only the providers that failed in the wallet's latest live lookup, and returns the merged result. Free. No body. | Parameter | In | Type | Required | Notes | | --------- | ---- | ------ | -------- | ----------------------------------- | | `address` | path | string | yes | A Solana address or a `0x` address. | ```bash curl -X POST "https://api.scanner.net/cross-chain/WALLET_ADDRESS/retry" \ -H "x-api-key: $SCANNER_API_KEY" ``` **Response:** the same shape as the [lookup](#cross-chain-lookup), with `cached: false`. Each wallet can be retried once every 30 seconds. The limit is per wallet, shared by every caller. | Status | Code | When | | ------ | ----------------- | -------------------------------------------------------------------------------------------------------------- | | 400 | `INVALID_ADDRESS` | Not a Solana or `0x` address. | | 409 | `CONFLICT` | There is no live lookup to retry, or retrying isn't available right now. The body includes `retryable: false`. | | 429 | `RATE_LIMITED` | The wallet was retried less than 30 seconds ago. The body includes `retryAfterSeconds`. | | 503 | `UPSTREAM_ERROR` | The bridge index didn't answer. |