ICRC7 Init args:
pub struct InitArg {
pub minting_account: Option<Account>,
pub icrc7_symbol: String,
pub icrc7_name: String,
pub icrc7_description: Option<String>,
pub icrc7_logo: Option<String>,
pub icrc7_supply_cap: Option<u128>,
pub icrc7_max_query_batch_size: Option<u16>,
pub icrc7_max_update_batch_size: Option<u16>,
pub icrc7_max_take_value: Option<u128>,
pub icrc7_default_take_value: Option<u128>,
pub icrc7_max_memo_size: Option<u32>,
pub icrc7_atomic_batch_transfers: Option<bool>,
pub tx_window: Option<u64>,
pub permitted_drift: Option<u64>,
pub approval_init: Option<InitApprovalsArg>, // ICRC37 Init args
pub archive_init: Option<InitArchiveArg>, // ICRC3 Init args
}ICRC37 Init args:
type InitApprovalsArg = record {
max_approvals : opt nat16;
max_approvals_per_token_or_collection : opt nat16;
settle_to_approvals : opt nat16;
max_revoke_approvals : opt nat16;
collection_approval_requires_token : opt bool;
}ICRC3 Init args:
type InitArchiveArg = record {
maxRecordsToArchive : nat; //Max number of archive items to archive in one round
archiveIndexType : IndexType; //Index type to use for the memory of the archive
maxArchivePages : nat; //Max number of pages allowed on the archivserver
settleToRecords : nat; //number of records to settle to during the clean up process
archiveCycles : nat; //number of cycles to sent to a new archive canister;
maxActiveRecords : nat; //allowed max active records on this canister
maxRecordsInArchiveInstance : nat; //specify the max number of archive items to put on an archive instance
archiveControllers : opt opt vec principal; //override the default controllers. The canister will always add itself to this group;
}ICRC-7 is the minimal standard for the implementation of Non-Fungible Tokens (NFTs) on the Internet Computer.
A token ledger implementation following this standard hosts an NFT collection (collection), which is a set of NFTs.
ICRC-7 does not handle approval-related operations such as approve and transfer_from itself. Those operations are specified by ICRC-37 which extends ICRC-7 with approval semantics.
dfx deploy icrc7 --argument '(record{
minting_account= opt record {
owner = principal "3yyxm-t5fpe-v32em-ac6lr-xyort-wuscb-dvl4x-3wnwi-hqkyj-xortw-oqe";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
};
icrc7_supply_cap= null;
icrc7_description= opt "ICP Flower Collection";
tx_window= null;
permitted_drift= null;
icrc7_max_take_value= opt 100;
icrc7_max_memo_size= opt 1000;
icrc7_symbol= "ICFL";
icrc7_max_update_batch_size= opt 100;
icrc7_max_query_batch_size= opt 100;
icrc7_atomic_batch_transfers= null;
icrc7_default_take_value= opt 100;
icrc7_logo= null;
icrc7_name= "ICP Flower";
approval_init= null;
archive_init= null
})'dfx deploy icrc7 --argument '(record{
minting_account= opt record {
owner = principal "3yyxm-t5fpe-v32em-ac6lr-xyort-wuscb-dvl4x-3wnwi-hqkyj-xortw-oqe";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
};
icrc7_supply_cap= null;
icrc7_description= opt "ICP Flower Collection";
tx_window= null;
permitted_drift= null;
icrc7_max_take_value= null;
icrc7_max_memo_size= null;
icrc7_symbol= "ICFL";
icrc7_max_update_batch_size= null;
icrc7_max_query_batch_size= null;
icrc7_atomic_batch_transfers= null;
icrc7_default_take_value= null;
icrc7_logo= null;
icrc7_name= "ICP Flower";
approval_init= null;
archive_init= opt record {
maxRecordsToArchive= 2;
archiveIndexType= variant {Stable};
maxArchivePages= 3;
settleToRecords= 2;
archiveCycles= 1000000000000;
maxActiveRecords= 4;
maxRecordsInArchiveInstance= 4;
archiveControllers= null
}
})'dfx canister call icrc7 mint '(record{
to= record {
owner = principal "3yyxm-t5fpe-v32em-ac6lr-xyort-wuscb-dvl4x-3wnwi-hqkyj-xortw-oqe";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
};
token_id=1;
memo= null;
from_subaccount= null;
token_description= opt "Token Number 1";
token_logo= null;
token_name= null
})'dfx canister call icrc7 icrc7_transfer '(vec{
record{
to=record {
owner = principal "t4egw-clf4w-qbpli-svryg-7yqq6-jt2yj-7v755-mabir-zmx6i-vp4fr-fqe";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
};
token_id= 1;
from_subaccount= null;
memo= null;
created_at_time= null
}
})'dfx canister call icrc7 icrc37_approve_tokens '(vec{
record{
token_id= 2;
approval_info= record {
memo= null;
from_subaccount= null;
created_at_time= null;
expires_at= null;
spender= record {
owner = principal "o2zom-piy75-ifbnk-nhhlq-362su-4vsx5-ptl2s-ec4jw-osbv4-nygtw-dae";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
}
}
}
})'
dfx canister call icrc7 icrc37_approve_collection '(vec{
record{
token_id= 2;
approval_info= record {
memo= null;
from_subaccount= null;
created_at_time= null;
expires_at= null;
spender= record {
owner = principal "o2zom-piy75-ifbnk-nhhlq-362su-4vsx5-ptl2s-ec4jw-osbv4-nygtw-dae";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
}
}
}
})'dfx canister call icrc7 icrc37_transfer_from '(vec{
record{
from= record {
owner = principal "3yyxm-t5fpe-v32em-ac6lr-xyort-wuscb-dvl4x-3wnwi-hqkyj-xortw-oqe";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
};
to= record {
owner = principal "t4egw-clf4w-qbpli-svryg-7yqq6-jt2yj-7v755-mabir-zmx6i-vp4fr-fqe";
subaccount = opt blob "\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00";
};
spender_subaccount= null;
token_id= 2;
memo= opt blob "123";
created_at_time= null
}
})'The implementation of the burn method does not delete the token; rather, it transfers the token to a burn_address (akin to a zero address).
dfx canister call icrc7 burn '(vec {
record {
token_id = 1 : nat;
memo = opt blob "Burning token 1";
from_subaccount = null
}
})'