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chore: prune out-dated / redundant Board docs
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# The Agoric Board | ||
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## Introduction | ||
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The Board is a shared, on-chain location that is where users post an object as a value and make | ||
it accessible to others. When a user posts a value, they receive a unique ID | ||
for that value. Others can get the value just by knowing the ID. You can make | ||
an ID known by any communication method; private email, a DM or other private | ||
message, an email blast to a mailing list or many individuals, listing it on a website, etc. | ||
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In particular, the Board is frequently used to give others access to deposit | ||
facets. After you post a deposit facet object to the Board, you distribute its | ||
Board ID string as widely as you'd like. Anyone who has that ID can use it to | ||
get access to its value, the deposit facet object. They can then safely deposit | ||
assets into the facet's associated purse without being able to withdraw assets | ||
from the purse or check its balance. | ||
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The `ids()` method returns all of the Board's currently used IDs. | ||
This means anyone can access any Board-stored value. The Board is public, | ||
not private. | ||
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Note that when calling from the REPL's `home` object, you must use | ||
the [`E` syntax](/guides/js-programming/eventual-send) | ||
as shown below. | ||
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## `E(home.board).getId(value)` | ||
- `value` `{ any }` | ||
- Returns: `{ string }` | ||
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If the `value` is present in the Board, this method returns its Board-associated ID value. | ||
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If the `value` is **not** present in the Board, this method adds it to the Board and assigns it | ||
an associated ID value. It returns the new ID value. | ||
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```js | ||
// Create an ID for an object that you want to make public | ||
command[1] E(home.board).getId(auctionInvitation) | ||
history[1] "1403739213" | ||
// The value auctionInvitation (an Invitation object) now has the ID "1403739213" | ||
command[2] E(home.board).getId(auctionInvitation) | ||
history[2] "1403739213" | ||
``` | ||
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## `E(home.board).getValue(id)` | ||
- `id` `{ string }` | ||
- Returns: `{ any }` | ||
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Looks up the `id` value in the Board and returns the Board-associated value for that ID. | ||
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With respect to the `CRC` used in an error message below, an ID has two parts, the raw id | ||
and a [CRC](https://en.wikipedia.org/wiki/Cyclic_redundancy_check). The CRC error | ||
happens when the passed-in id's CRC value is checked. The alleged ID is split into its | ||
two parts, and if the CRC in the alleged ID doesn't match the CRC produced at this time | ||
from the raw ID value, it throws the error. | ||
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Errors: | ||
- If the `id` value is not a string, errors with the message "id must be string" and a log of the failing `id` that was passed in. | ||
- If the `id` value has too few digits, errors with the message "id must consist of at least 3 digits". | ||
- If the `id` value has a different CRC value than the stored one, errors with the message "id is probably a typo, cannot verify CRC". | ||
- If the `id` value is not in the Board, errors with the message "board does not have id: [id]". | ||
```js | ||
// Continuing from the example above in getValue(), the id returns its associated value | ||
command[3] E(home.board).getValue("1403739213") | ||
// Returns the "abc" value | ||
history[3] [Alleged: presence o-102]{} | ||
``` | ||
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## `E(home.board).has(value)` | ||
- `value` `{ any }` | ||
- Returns `{ boolean }` | ||
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Returns `true` if the specified value has an associated Board ID. | ||
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```js | ||
// Pass an id, not a value, so returns false | ||
command[4] E(home.board).has("1403739213") | ||
history[4] false | ||
// Pass a value that does have an id in the Board, so returns true | ||
command[5] E(home.board).has(auctionInvitation) | ||
history[5] true | ||
``` | ||
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## `E(home.board).ids()` | ||
- Returns: `{ Array of strings }` | ||
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Returns an array of all IDs in the Board. Remember, the Board is public, so | ||
anyone can access anything in it. | ||
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```js | ||
command[6] E(home.board).ids() | ||
history[6] ["604346717","381205908","1667979430","1576549616","1532665031", | ||
"727995140","371571443","1456154132","500716545","815824725", | ||
"262188032","1265655452","1202180815","813441138","605437304", | ||
"1403739213"] | ||
``` | ||
see [Board Name Service](../../guides/integration/name-services#the-board-publishing-under-arbitrary-names) |