feat(ag-trade): place bid by discount

[dckc]

Setup: endo, network, account

As before, `make reserve-add` does account set-up, using some secrets:

$ cat .envrc 
PATH_add /Users/connolly/projects/endo/packages/cli/bin

# user1:  agoric1p2aqakv3ulz4qfy2nut86j9gx0dx0yw09h96md
export ALICE_SECRET="orbit bench..."

then:

$ make reserve-add
++ install cosmos fetch plugin
endo make --UNCONFINED src/cosmosFetch.js -n cosmos-fetch
Object [Alleged: CosmosFetch] {}
endo make src/net-local.js -n local -p cosmos-fetch
{ lcd: Object [Alleged: LCD] {}, rpc: Object [Alleged: RpcClient] {} }
++ start smart wallet caplet -- TODO: should not need UNSAFE
endo make --UNCONFINED src/smartWallet.js -n client-maker
Object [Alleged: SmartWalletFactory] {}
endo eval "E(wf).makeWalletKit('orbit bench...', local.rpc, local.lcd)" \
                local wf:client-maker -n alice-wk
{
  query: Object [Alleged: QueryTool] {},
  smartWallet: Object [Alleged: SmartWallet] {},
  tx: Object [Alleged: SigningClient] {}
}
endo make src/fresh-id.js -n fresh
Object [Alleged: FreshMaker] {}
endo make --UNCONFINED src/clock.js -n clock
Object [Alleged: Clock] {}
endo eval "E(fresh).start(clock, 'trade-')" fresh -n fresh-trade-id clock
Object [Alleged: Fresh] {}
endo mkguest alice
Object [Alleged: EndoGuest] {}
endo send alice @wallet:alice-wk
endo send alice @fresh:fresh-trade-id
endo inbox --as alice
# these 0/1 message numbers are fragile
endo adopt 0 wallet --as alice
endo adopt 1 fresh --as alice

and finally, it does...

endo run src/reserve-add.js 1 IST -p alice
{
  status: {
    error: 'Error: cannot grab 1000000uist coins: 40000uist is smaller than 1000000uist: insufficient funds',
    id: 'trade-0311.0',
    invitationSpec: {
      callPipe: [Array],
      instancePath: [Array],
      source: 'agoricContract'
    },
    proposal: { give: [Object] },
    result: [ [Object] ]
  },
  tx: {
    height: 9941,
    transactionHash: '069876AA2180BAD75FB847D4F6DF0313AF02F3F0ACA6131FBBB6AAB6A8F0E14D'
  }
}

Place a bid by discount

$ endo run src/auction-bid.js -p alice -- --give '0.01 IST' --maxBuy '1000 ATOM' --discount 0.05
vbankAssets [  'USDC_axl', 'USDT_grv', ... ]
{
  status: {
    id: 'trade-0255.3',
    invitationSpec: {
      callPipe: [Array],
      instancePath: [Array],
      source: 'agoricContract'
    },
    offerArgs: { maxBuy: [Object], offerBidScaling: [Object] },
    proposal: { give: [Object] },
    result: 'Your bid has been accepted'
  },
  tx: {
    height: 8991,
    transactionHash: 'BBFBA3C886428E95F101165073CE928F5E089A75A32825FCDDBD253603D45CF2'
  }
}

List Bids

$ endo run src/auction-bid.js -p alice -- --list
{"id":"trade-0255.3","invitationSpec":{"callPipe":[["makeBidInvitation",["[Alleged: ATOM brand#board05557]"]]],"instancePath":["auctioneer"],"source":"agoricContract"},"offerArgs":{"maxBuy":{"brand":"[Seen]","value":"[1000000000n]"},"offerBidScaling":{"denominator":{"brand":"[Alleged: IST brand#board0257]","value":"[100n]"},"numerator":{"brand":"[Seen]","value":"[95n]"}}},"proposal":{"give":{"Bid":{"brand":"[Seen]","value":"[10000n]"}}}}

With jq, i.e. endo run src/auction-bid.js -p alice -- --list|jq:

{
  "id": "trade-0255.3",
  "invitationSpec": {
    "callPipe": [
      [
        "makeBidInvitation",
        [
          "[Alleged: ATOM brand#board05557]"
        ]
      ]
    ],
    "instancePath": [
      "auctioneer"
    ],
    "source": "agoricContract"
  },
  "offerArgs": {
    "maxBuy": {
      "brand": "[Seen]",
      "value": "[1000000000n]"
    },
    "offerBidScaling": {
      "denominator": {
        "brand": "[Alleged: IST brand#board0257]",
        "value": "[100n]"
      },
      "numerator": {
        "brand": "[Seen]",
        "value": "[95n]"
      }
    }
  },
  "proposal": {
    "give": {
      "Bid": {
        "brand": "[Seen]",
        "value": "[10000n]"
      }
    }
  }
}

cc @dtribble @ivanlei @kriskowal