Subgraph interactions
SDK functions to read from the Toucan subgraph
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SDK functions to read from the Toucan subgraph
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Toucan SDK offers a lot of pre-defined queries. Try them out! If you don't find what you are looking for, you can also .
The fetchTokenPriceOnDex
function fetches the price of a token on a DEX (decentralized exchange).
pool
PoolSymbol
e.g. NCT
The pool token to fetch the price for
The fetchUserBatches
function fetches up to 100 batches owned by user. It returns an array of objects with different properties of the each batch.
walletAddress
string
The address of the user to fetch batches for
The query returns an array of objects, each with a batch's id
, tx
, serialNumber
, quantity
, confirmationStatus
, comments
and creator
.
The fetchTCO2TokenById
function fetches the TCO2 token by its ID. It returns a TCO2 Detail object with properties of the TCO2 (name, address, etc).
id
string
ID of the TCO2 to query for; the id happens to be the same as the address e.g.: "0x004090eef602e024b2a6cb7f0c1edda992382994"
The fetchTCO2TokenByFullSymbol
function fetches properties of a TCO2 token contract by its full symbol. It returns a TCO2Detail
object with properties of the TCO2, including id
, name
, symbol
, address
, and projectVintage
details.
fullSymbol
string
Full symbol of the TCO2 token to be fetched, e.g.: "TCO2-VCS-1718-2013"
The fetchAllTCO2Tokens
function fetches TCO2 details of all TCO2 tokens. It returns array of TCO2 Detail objects with properties of the TCO2s, including id
, name
, symbol
, address
, and projectVintage
details.
The fetchBridgedBatchTokens
function fetches data about BatchTokens that have been bridged. It returns an array of BatchTokens containing different properties like id, serialNumber or quantity. The BatchToken
objects returned include id
, serialNumber
, quantity
, creator
, timestamp
and tx
.
The fetchUserRetirements
function fetches all retirements made by a user. It returns an array of objects containing retirement properties like id
, creationTx
, amount
, token
details, certificate
details and more.
walletAddress
string
The address of the user to fetch retirements
first
number
How many retirements you want fetched; defaults to 100
skip
number
How many (if any) retirements you want skipped; defaults to 0
Fetches redemptions from a given pool. It returns an array of objects with properties of the redeems like id
, amount
, timestamp
and more.
pool
PoolSymbol
e.g. NCT
The pool token to fetch the price for
first
number
How many redeems you want fetched; defaults to 100
skip
number
How many (if any) redeems you want skipped; defaults to 0
The fetchUserRedeems
function fetches all redeems from a given pool by a specific user. It returns an array of objects with properties of the redeems like id
, amount
, timestamp
and more.
walletAddress
string
The address of the user to query for
pool
PoolSymbol
e.g. NCT
The pool token to fetch the user redeems for
first
number
How many redeems you want fetched; defaults to 100
skip
number
How many (if any) redeems you want skipped; defaults to 0
Promise<RedeemEvent[]>
: An array of all redeem events for the specified user.
The fetchPoolContents
function fetches TCO2 tokens that are part of the given pool. It returns an array of objects representing TCO2 tokens and containing properties like name
, amount
, methodology
and more.
pool
PoolSymbol
e.g. NCT
The pool to fetch the contents of
first
number
How many TCO2 tokens you want fetched; defaults to 1000 (i.e. all of them)
skip
number
How many (if any) TCO2 tokens you want skipped; defaults to 0
The fetchProjectById
function fetches the project by its Toucan ID (not projectId
!). The query returns an object with properties of the Project like projectId
, region
, standard and more.
id
string
Toucan ID of the project to be fetched, e.g.: "10"
The fetchAggregations
function fetches all protocol-wide aggregations, including, for example, tco2TotalRetired
, totalProjectsTokenized
, or totalCarbonBridged
. It returns an array of Aggregation objects containing properties like id
, key
, value
.
RegistryContract
: The registry contract instance.
In case you don't find what you are looking for in the pre-build queries, you can create your own with the fetchCustomQuery
method.
region
stands for the country
The Toucan ID refers to the token ID in .
This allows you to fetch with your own queries and can be very powerful if you know GraphQL. You can also check out various example queries in our subgraph .